Country: Canada
United StatesCanadaUnited Kingdom

Cowichan Lake water level history

Daily records since 1913 · Level today: 0.489 m

Highest on record
4.444 m
Jan 21, 1968
Lowest on record
0.085 m
Sep 30, 1915
Today
0.489 m
Oct 23, 2026
Years of data
114
since 1913

In short

Across 54 complete years, 1915 had the lowest average level (0.939 m) and 1997 the highest (1.781 m).

On average the lake is lowest in September (0.772 m) and highest in January (1.918 m).

Cowichan Lake level, all years

Loading chart…

Measured Normal range for the date (middle 50% of past years)

Each year's lowest and highest level

-012351913192719411955196919831997201120261913: lowest 0.34 m (1913-08-30), highest 2.77 m (1913-11-29), average 1.04 m, 306 days measured1914: lowest 0.17 m (1914-09-06), highest 3.05 m (1914-01-07), average 1.16 m, 363 days measured1915: lowest 0.09 m (1915-09-30), highest 2.34 m (1915-12-09), average 0.94 m, 364 days measured1916: lowest 0.17 m (1916-10-25), highest 2.28 m (1916-03-13), average 1.10 m, 366 days measured1917: lowest 0.27 m (1917-09-21), highest 3.00 m (1917-12-31), average 1.02 m, 365 days measured1918: lowest 0.18 m (1918-10-01), highest 3.50 m (1918-01-04), average 1.18 m, 365 days measured1919: lowest 0.14 m (1919-10-28), highest 2.86 m (1919-12-27), average 1.10 m, 365 days measured1920: lowest 0.26 m (1920-08-25), highest 2.57 m (1920-12-05), average 1.15 m, 366 days measured1921: lowest 0.40 m (1921-08-31), highest 2.43 m (1921-01-15), average 1.20 m, 273 days measured1952: lowest 1.53 m (1952-12-27), highest 2.02 m (1952-12-17), average 1.75 m, 15 days measured1953: lowest 0.27 m (1953-09-25), highest 3.55 m (1953-01-13), average 1.50 m, 169 days measured1954: lowest 0.46 m (1954-09-08), highest 3.35 m (1954-11-22), average 1.47 m, 118 days measured1955: lowest 0.41 m (1955-09-30), highest 3.41 m (1955-11-05), average 1.21 m, 154 days measured1956: lowest 0.27 m (1956-09-16), highest 2.56 m (1956-12-18), average 1.32 m, 162 days measured1957: lowest 0.54 m (1957-07-08), highest 2.65 m (1957-12-30), average 1.12 m, 161 days measured1958: lowest 0.47 m (1958-09-10), highest 3.26 m (1958-01-24), average 1.50 m, 155 days measured1959: lowest 0.95 m (1959-08-30), highest 2.62 m (1959-05-02), average 1.54 m, 155 days measured1960: lowest 0.83 m (1960-10-05), highest 2.66 m (1960-02-15), average 1.52 m, 157 days measured1961: lowest 0.75 m (1961-10-02), highest 4.33 m (1961-01-16), average 1.66 m, 161 days measured1962: lowest 0.55 m (1962-09-27), highest 2.90 m (1962-11-28), average 1.30 m, 244 days measured1963: lowest 0.38 m (1963-10-11), highest 3.28 m (1963-12-25), average 1.50 m, 155 days measured1964: lowest 0.62 m (1964-09-14), highest 2.93 m (1964-01-05), average 1.40 m, 157 days measured1965: lowest 0.40 m (1965-10-02), highest 2.81 m (1965-12-06), average 1.44 m, 160 days measured1966: lowest 0.49 m (1966-10-18), highest 4.14 m (1966-12-19), average 1.61 m, 165 days measured1967: lowest 0.55 m (1967-09-30), highest 2.90 m (1967-02-04), average 1.56 m, 164 days measured1968: lowest 0.67 m (1968-09-10), highest 4.44 m (1968-01-21), average 1.68 m, 163 days measured1969: lowest 0.70 m (1969-09-13), highest 2.35 m (1969-12-24), average 1.39 m, 159 days measured1970: lowest 0.52 m (1970-10-15), highest 2.23 m (1970-12-17), average 1.30 m, 159 days measured1971: lowest 0.64 m (1971-10-02), highest 2.70 m (1971-11-11), average 1.41 m, 295 days measured1972: lowest 0.37 m (1972-11-01), highest 3.64 m (1972-12-27), average 1.41 m, 366 days measured1973: lowest 0.42 m (1973-10-11), highest 3.11 m (1973-01-17), average 1.29 m, 327 days measured1974: lowest 0.37 m (1974-11-04), highest 3.47 m (1974-01-18), average 1.47 m, 345 days measured1975: lowest 0.56 m (1975-10-03), highest 3.68 m (1975-11-15), average 1.52 m, 365 days measured1976: lowest 0.51 m (1976-10-23), highest 2.31 m (1976-01-01), average 1.31 m, 366 days measured1977: lowest 0.57 m (1977-10-21), highest 2.84 m (1977-12-15), average 1.44 m, 365 days measured1978: lowest 0.59 m (1978-08-27), highest 1.70 m (1978-03-06), average 1.26 m, 365 days measured1979: lowest 0.60 m (1979-10-21), highest 3.49 m (1979-12-20), average 1.35 m, 365 days measured1980: lowest 0.56 m (1980-10-28), highest 4.07 m (1980-12-28), average 1.50 m, 366 days measured1981: lowest 0.72 m (1981-09-20), highest 3.35 m (1981-01-01), average 1.56 m, 365 days measured1982: lowest 0.49 m (1982-10-21), highest 2.94 m (1982-02-20), average 1.47 m, 341 days measured1983: lowest 0.45 m (1983-10-18), highest 3.77 m (1983-11-17), average 1.57 m, 365 days measured1984: lowest 0.64 m (1984-10-06), highest 2.60 m (1984-01-05), average 1.52 m, 366 days measured1985: lowest 0.53 m (1985-10-10), highest 1.87 m (1985-11-03), average 1.14 m, 365 days measured1986: lowest 0.41 m (1986-10-25), highest 2.86 m (1986-01-20), average 1.40 m, 365 days measured1987: lowest 0.36 m (1987-11-08), highest 2.78 m (1987-01-13), average 1.39 m, 365 days measured1988: lowest 0.60 m (1988-10-12), highest 2.20 m (1988-11-24), average 1.41 m, 366 days measured1989: lowest 0.49 m (1989-10-11), highest 2.28 m (1989-12-08), average 1.29 m, 365 days measured1990: lowest 0.74 m (1990-10-02), highest 3.71 m (1990-12-05), average 1.63 m, 365 days measured1991: lowest 0.63 m (1991-11-03), highest 3.44 m (1991-02-05), average 1.52 m, 365 days measured1992: lowest 0.58 m (1992-10-17), highest 4.12 m (1992-02-01), average 1.38 m, 366 days measured1993: lowest 0.57 m (1993-10-22), highest 2.80 m (1993-12-15), average 1.32 m, 365 days measured1994: lowest 0.66 m (1994-10-18), highest 3.44 m (1994-03-04), average 1.52 m, 365 days measured1995: lowest 0.53 m (1995-10-05), highest 3.44 m (1995-12-15), average 1.65 m, 365 days measured1996: lowest 0.56 m (1996-10-01), highest 2.91 m (1996-01-15), average 1.41 m, 366 days measured1997: lowest 1.12 m (1997-08-24), highest 3.44 m (1997-03-20), average 1.78 m, 335 days measured1998: lowest 0.32 m (1998-10-02), highest 3.23 m (1998-12-13), average 1.29 m, 322 days measured1999: lowest 0.66 m (1999-10-25), highest 2.80 m (1999-12-18), average 1.67 m, 308 days measured2000: lowest 0.81 m (2000-10-16), highest 1.85 m (2000-05-06), average 1.41 m, 332 days measured2001: lowest 0.89 m (2001-08-01), highest 2.83 m (2001-12-19), average 1.39 m, 365 days measured2002: lowest 0.41 m (2002-11-04), highest 3.37 m (2002-01-09), average 1.49 m, 333 days measured2003: lowest 0.52 m (2003-10-05), highest 3.55 m (2003-10-21), average 1.55 m, 359 days measured2004: lowest 0.87 m (2004-08-20), highest 2.54 m (2004-12-11), average 1.44 m, 349 days measured2005: lowest 0.83 m (2005-12-20), highest 3.36 m (2005-01-23), average 1.52 m, 327 days measured2006: lowest 0.65 m (2006-10-25), highest 3.09 m (2006-01-17), average 1.46 m, 307 days measured2007: lowest 0.98 m (2007-09-28), highest 3.08 m (2007-01-08), average 1.56 m, 286 days measured2008: lowest 0.91 m (2008-12-29), highest 2.07 m (2008-01-15), average 1.35 m, 366 days measured2009: lowest 0.71 m (2009-10-13), highest 3.64 m (2009-11-21), average 1.48 m, 330 days measured2010: lowest 0.84 m (2010-09-17), highest 3.38 m (2010-01-16), average 1.58 m, 365 days measured2011: lowest 0.89 m (2011-09-21), highest 2.66 m (2011-01-18), average 1.54 m, 365 days measured2012: lowest 0.63 m (2012-10-12), highest 2.71 m (2012-12-05), average 1.54 m, 366 days measured2013: lowest 0.77 m (2013-12-22), highest 2.21 m (2013-03-03), average 1.33 m, 365 days measured2014: lowest 0.59 m (2014-10-10), highest 3.12 m (2014-12-12), average 1.38 m, 365 days measured2015: lowest 0.51 m (2015-08-28), highest 3.37 m (2015-12-11), average 1.38 m, 365 days measured2016: lowest 0.43 m (2016-10-01), highest 2.94 m (2016-01-29), average 1.41 m, 366 days measured2017: lowest 0.49 m (2017-10-15), highest 3.54 m (2017-11-26), average 1.48 m, 365 days measured2018: lowest 0.53 m (2018-09-08), highest 3.42 m (2018-12-21), average 1.38 m, 365 days measured2019: lowest 0.28 m (2019-09-11), highest 3.34 m (2019-01-05), average 1.00 m, 365 days measured2020: lowest 0.81 m (2020-09-22), highest 3.93 m (2020-02-02), average 1.52 m, 366 days measured2021: lowest 0.41 m (2021-09-16), highest 3.74 m (2021-11-16), average 1.44 m, 365 days measured2022: lowest 0.47 m (2022-10-23), highest 2.41 m (2022-01-14), average 1.27 m, 365 days measured2023: lowest 0.20 m (2023-09-24), highest 2.76 m (2023-01-14), average 1.16 m, 365 days measured2024: lowest 0.58 m (2024-10-13), highest 2.55 m (2024-02-01), average 1.43 m, 366 days measured2026: lowest 0.50 m (2026-10-21), highest 0.58 m (2026-09-29), average 0.55 m, 30 days measured
-01235191319411969199720261913: lowest 0.34 m (1913-08-30), highest 2.77 m (1913-11-29), average 1.04 m, 306 days measured1914: lowest 0.17 m (1914-09-06), highest 3.05 m (1914-01-07), average 1.16 m, 363 days measured1915: lowest 0.09 m (1915-09-30), highest 2.34 m (1915-12-09), average 0.94 m, 364 days measured1916: lowest 0.17 m (1916-10-25), highest 2.28 m (1916-03-13), average 1.10 m, 366 days measured1917: lowest 0.27 m (1917-09-21), highest 3.00 m (1917-12-31), average 1.02 m, 365 days measured1918: lowest 0.18 m (1918-10-01), highest 3.50 m (1918-01-04), average 1.18 m, 365 days measured1919: lowest 0.14 m (1919-10-28), highest 2.86 m (1919-12-27), average 1.10 m, 365 days measured1920: lowest 0.26 m (1920-08-25), highest 2.57 m (1920-12-05), average 1.15 m, 366 days measured1921: lowest 0.40 m (1921-08-31), highest 2.43 m (1921-01-15), average 1.20 m, 273 days measured1952: lowest 1.53 m (1952-12-27), highest 2.02 m (1952-12-17), average 1.75 m, 15 days measured1953: lowest 0.27 m (1953-09-25), highest 3.55 m (1953-01-13), average 1.50 m, 169 days measured1954: lowest 0.46 m (1954-09-08), highest 3.35 m (1954-11-22), average 1.47 m, 118 days measured1955: lowest 0.41 m (1955-09-30), highest 3.41 m (1955-11-05), average 1.21 m, 154 days measured1956: lowest 0.27 m (1956-09-16), highest 2.56 m (1956-12-18), average 1.32 m, 162 days measured1957: lowest 0.54 m (1957-07-08), highest 2.65 m (1957-12-30), average 1.12 m, 161 days measured1958: lowest 0.47 m (1958-09-10), highest 3.26 m (1958-01-24), average 1.50 m, 155 days measured1959: lowest 0.95 m (1959-08-30), highest 2.62 m (1959-05-02), average 1.54 m, 155 days measured1960: lowest 0.83 m (1960-10-05), highest 2.66 m (1960-02-15), average 1.52 m, 157 days measured1961: lowest 0.75 m (1961-10-02), highest 4.33 m (1961-01-16), average 1.66 m, 161 days measured1962: lowest 0.55 m (1962-09-27), highest 2.90 m (1962-11-28), average 1.30 m, 244 days measured1963: lowest 0.38 m (1963-10-11), highest 3.28 m (1963-12-25), average 1.50 m, 155 days measured1964: lowest 0.62 m (1964-09-14), highest 2.93 m (1964-01-05), average 1.40 m, 157 days measured1965: lowest 0.40 m (1965-10-02), highest 2.81 m (1965-12-06), average 1.44 m, 160 days measured1966: lowest 0.49 m (1966-10-18), highest 4.14 m (1966-12-19), average 1.61 m, 165 days measured1967: lowest 0.55 m (1967-09-30), highest 2.90 m (1967-02-04), average 1.56 m, 164 days measured1968: lowest 0.67 m (1968-09-10), highest 4.44 m (1968-01-21), average 1.68 m, 163 days measured1969: lowest 0.70 m (1969-09-13), highest 2.35 m (1969-12-24), average 1.39 m, 159 days measured1970: lowest 0.52 m (1970-10-15), highest 2.23 m (1970-12-17), average 1.30 m, 159 days measured1971: lowest 0.64 m (1971-10-02), highest 2.70 m (1971-11-11), average 1.41 m, 295 days measured1972: lowest 0.37 m (1972-11-01), highest 3.64 m (1972-12-27), average 1.41 m, 366 days measured1973: lowest 0.42 m (1973-10-11), highest 3.11 m (1973-01-17), average 1.29 m, 327 days measured1974: lowest 0.37 m (1974-11-04), highest 3.47 m (1974-01-18), average 1.47 m, 345 days measured1975: lowest 0.56 m (1975-10-03), highest 3.68 m (1975-11-15), average 1.52 m, 365 days measured1976: lowest 0.51 m (1976-10-23), highest 2.31 m (1976-01-01), average 1.31 m, 366 days measured1977: lowest 0.57 m (1977-10-21), highest 2.84 m (1977-12-15), average 1.44 m, 365 days measured1978: lowest 0.59 m (1978-08-27), highest 1.70 m (1978-03-06), average 1.26 m, 365 days measured1979: lowest 0.60 m (1979-10-21), highest 3.49 m (1979-12-20), average 1.35 m, 365 days measured1980: lowest 0.56 m (1980-10-28), highest 4.07 m (1980-12-28), average 1.50 m, 366 days measured1981: lowest 0.72 m (1981-09-20), highest 3.35 m (1981-01-01), average 1.56 m, 365 days measured1982: lowest 0.49 m (1982-10-21), highest 2.94 m (1982-02-20), average 1.47 m, 341 days measured1983: lowest 0.45 m (1983-10-18), highest 3.77 m (1983-11-17), average 1.57 m, 365 days measured1984: lowest 0.64 m (1984-10-06), highest 2.60 m (1984-01-05), average 1.52 m, 366 days measured1985: lowest 0.53 m (1985-10-10), highest 1.87 m (1985-11-03), average 1.14 m, 365 days measured1986: lowest 0.41 m (1986-10-25), highest 2.86 m (1986-01-20), average 1.40 m, 365 days measured1987: lowest 0.36 m (1987-11-08), highest 2.78 m (1987-01-13), average 1.39 m, 365 days measured1988: lowest 0.60 m (1988-10-12), highest 2.20 m (1988-11-24), average 1.41 m, 366 days measured1989: lowest 0.49 m (1989-10-11), highest 2.28 m (1989-12-08), average 1.29 m, 365 days measured1990: lowest 0.74 m (1990-10-02), highest 3.71 m (1990-12-05), average 1.63 m, 365 days measured1991: lowest 0.63 m (1991-11-03), highest 3.44 m (1991-02-05), average 1.52 m, 365 days measured1992: lowest 0.58 m (1992-10-17), highest 4.12 m (1992-02-01), average 1.38 m, 366 days measured1993: lowest 0.57 m (1993-10-22), highest 2.80 m (1993-12-15), average 1.32 m, 365 days measured1994: lowest 0.66 m (1994-10-18), highest 3.44 m (1994-03-04), average 1.52 m, 365 days measured1995: lowest 0.53 m (1995-10-05), highest 3.44 m (1995-12-15), average 1.65 m, 365 days measured1996: lowest 0.56 m (1996-10-01), highest 2.91 m (1996-01-15), average 1.41 m, 366 days measured1997: lowest 1.12 m (1997-08-24), highest 3.44 m (1997-03-20), average 1.78 m, 335 days measured1998: lowest 0.32 m (1998-10-02), highest 3.23 m (1998-12-13), average 1.29 m, 322 days measured1999: lowest 0.66 m (1999-10-25), highest 2.80 m (1999-12-18), average 1.67 m, 308 days measured2000: lowest 0.81 m (2000-10-16), highest 1.85 m (2000-05-06), average 1.41 m, 332 days measured2001: lowest 0.89 m (2001-08-01), highest 2.83 m (2001-12-19), average 1.39 m, 365 days measured2002: lowest 0.41 m (2002-11-04), highest 3.37 m (2002-01-09), average 1.49 m, 333 days measured2003: lowest 0.52 m (2003-10-05), highest 3.55 m (2003-10-21), average 1.55 m, 359 days measured2004: lowest 0.87 m (2004-08-20), highest 2.54 m (2004-12-11), average 1.44 m, 349 days measured2005: lowest 0.83 m (2005-12-20), highest 3.36 m (2005-01-23), average 1.52 m, 327 days measured2006: lowest 0.65 m (2006-10-25), highest 3.09 m (2006-01-17), average 1.46 m, 307 days measured2007: lowest 0.98 m (2007-09-28), highest 3.08 m (2007-01-08), average 1.56 m, 286 days measured2008: lowest 0.91 m (2008-12-29), highest 2.07 m (2008-01-15), average 1.35 m, 366 days measured2009: lowest 0.71 m (2009-10-13), highest 3.64 m (2009-11-21), average 1.48 m, 330 days measured2010: lowest 0.84 m (2010-09-17), highest 3.38 m (2010-01-16), average 1.58 m, 365 days measured2011: lowest 0.89 m (2011-09-21), highest 2.66 m (2011-01-18), average 1.54 m, 365 days measured2012: lowest 0.63 m (2012-10-12), highest 2.71 m (2012-12-05), average 1.54 m, 366 days measured2013: lowest 0.77 m (2013-12-22), highest 2.21 m (2013-03-03), average 1.33 m, 365 days measured2014: lowest 0.59 m (2014-10-10), highest 3.12 m (2014-12-12), average 1.38 m, 365 days measured2015: lowest 0.51 m (2015-08-28), highest 3.37 m (2015-12-11), average 1.38 m, 365 days measured2016: lowest 0.43 m (2016-10-01), highest 2.94 m (2016-01-29), average 1.41 m, 366 days measured2017: lowest 0.49 m (2017-10-15), highest 3.54 m (2017-11-26), average 1.48 m, 365 days measured2018: lowest 0.53 m (2018-09-08), highest 3.42 m (2018-12-21), average 1.38 m, 365 days measured2019: lowest 0.28 m (2019-09-11), highest 3.34 m (2019-01-05), average 1.00 m, 365 days measured2020: lowest 0.81 m (2020-09-22), highest 3.93 m (2020-02-02), average 1.52 m, 366 days measured2021: lowest 0.41 m (2021-09-16), highest 3.74 m (2021-11-16), average 1.44 m, 365 days measured2022: lowest 0.47 m (2022-10-23), highest 2.41 m (2022-01-14), average 1.27 m, 365 days measured2023: lowest 0.20 m (2023-09-24), highest 2.76 m (2023-01-14), average 1.16 m, 365 days measured2024: lowest 0.58 m (2024-10-13), highest 2.55 m (2024-02-01), average 1.43 m, 366 days measured2026: lowest 0.50 m (2026-10-21), highest 0.58 m (2026-09-29), average 0.55 m, 30 days measured
Lowest to highest that yearYear average2026 so far

One bar per year from the lowest to the highest daily level, with the year's average. Years with no bar have no daily record in the agency archive.

Lowest years

Years ranked by their lowest daily level.

  • 19150.085 m on Sep 30
  • 19190.137 m on Oct 28
  • 19160.168 m on Oct 25
  • 19140.168 m on Sep 6
  • 19180.183 m on Oct 1

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)0.5500.499Oct 210.580Sep 29
20241.4270.575Oct 132.548Feb 1
20231.1570.202Sep 242.759Jan 14
20221.2690.466Oct 232.415Jan 14
20211.4440.407Sep 163.740Nov 16
20201.5170.812Sep 223.931Feb 2
20191.0030.279Sep 113.336Jan 5
20181.3810.533Sep 83.422Dec 21
20171.4820.490Oct 153.535Nov 26
20161.4080.433Oct 12.942Jan 29
20151.3810.513Aug 283.368Dec 11
20141.3810.589Oct 103.116Dec 12
20131.3340.767Dec 222.214Mar 3
20121.5360.635Oct 122.708Dec 5
20111.5410.894Sep 212.663Jan 18
20101.5800.841Sep 173.381Jan 16
20091.4810.707Oct 133.641Nov 21
20081.3500.914Dec 292.069Jan 15
2007 (286 days)1.5620.984Sep 283.076Jan 8
2006 (307 days)1.4630.647Oct 253.086Jan 17
2005 (327 days)1.5220.835Dec 203.359Jan 23
20041.4380.866Aug 202.538Dec 11
20031.5460.521Oct 53.551Oct 21
20021.4890.413Nov 43.375Jan 9
20011.3950.887Aug 12.827Dec 19
20001.4110.810Oct 161.848May 6
1999 (308 days)1.6750.663Oct 252.799Dec 18
1998 (322 days)1.2860.315Oct 23.234Dec 13
19971.7811.118Aug 243.438Mar 20
19961.4110.564Oct 12.908Jan 15
19951.6460.530Oct 53.438Dec 15
19941.5160.660Oct 183.436Mar 4
19931.3170.568Oct 222.796Dec 15
19921.3780.584Oct 174.123Feb 1
19911.5160.630Nov 33.438Feb 5
19901.6280.738Oct 23.708Dec 5
19891.2900.492Oct 112.278Dec 8
19881.4070.596Oct 122.198Nov 24
19871.3940.364Nov 82.780Jan 13
19861.4040.414Oct 252.860Jan 20
19851.1400.532Oct 101.866Nov 3
19841.5170.638Oct 62.602Jan 5
19831.5670.447Oct 183.768Nov 17
19821.4730.494Oct 212.938Feb 20
19811.5590.722Sep 203.348Jan 1
19801.4990.562Oct 284.068Dec 28
19791.3510.596Oct 213.486Dec 20
19781.2640.594Aug 271.698Mar 6
19771.4420.573Oct 212.841Dec 15
19761.3150.509Oct 232.307Jan 1
19751.5160.564Oct 33.676Nov 15
19741.4660.366Nov 43.472Jan 18
1973 (327 days)1.2900.418Oct 113.109Jan 17
19721.4080.366Nov 13.642Dec 27
1971 (295 days)1.4090.643Oct 22.704Nov 11
1970 (159 days)1.2970.524Oct 152.228Dec 17
1969 (159 days)1.3860.704Sep 132.350Dec 24
1968 (163 days)1.6760.671Sep 104.444Jan 21
1967 (164 days)1.5560.546Sep 302.896Feb 4
1966 (165 days)1.6120.494Oct 184.139Dec 19
1965 (160 days)1.4370.405Oct 22.810Dec 6
1964 (157 days)1.4000.619Sep 142.932Jan 5
1963 (155 days)1.5040.381Oct 113.277Dec 25
1962 (244 days)1.3020.546Sep 272.896Nov 28
1961 (161 days)1.6600.747Oct 24.328Jan 16
1960 (157 days)1.5210.829Oct 52.664Feb 15
1959 (155 days)1.5370.945Aug 302.621May 2
1958 (155 days)1.4970.469Sep 103.261Jan 24
1957 (161 days)1.1210.543Jul 82.652Dec 30
1956 (162 days)1.3240.274Sep 162.560Dec 18
1955 (154 days)1.2100.411Sep 303.414Nov 5
1954 (118 days)1.4750.457Sep 83.353Nov 22
1953 (169 days)1.4960.271Sep 253.551Jan 13
1952 (15 days)1.7511.527Dec 272.021Dec 17
1921 (273 days)1.2000.405Aug 312.429Jan 15
19201.1480.259Aug 252.566Dec 5
19191.1000.137Oct 282.865Dec 27
19181.1840.183Oct 13.505Jan 4
19171.0160.274Sep 213.002Dec 31
19161.1000.168Oct 252.280Mar 13
19150.9390.085Sep 302.341Dec 9
19141.1550.168Sep 63.048Jan 7
1913 (306 days)1.0370.335Aug 302.774Nov 29

Levels in metres. Partial years show the number of days with data.

Monthly averages

MonthAverageLowestHighest
January1.9180.7924.444
February1.7490.7824.123
March1.5770.6853.438
April1.5200.7332.557
May1.4120.6642.621
June1.3010.4271.920
July1.1370.2681.825
August0.9050.1772.034
September0.7720.0852.048
October0.9430.0853.551
November1.6420.1623.768
December1.9100.7354.139

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Daily levels as CSV (25,239 rows; credit the original agencies listed below)