Country: Canada
United StatesCanadaUnited Kingdom

Nonacho Lake water level history

Daily records since 1962 · Level today: 6.360 m

Highest on record
7.038 m
Jul 16, 2021
Lowest on record
3.066 m
May 10, 1966
Today
6.360 m
Oct 23, 2026
Years of data
64
since 1962

In short

Across 52 complete years, 1965 had the lowest average level (3.592 m) and 2021 the highest (6.589 m).

On average the lake is lowest in April (5.606 m) and highest in July (6.190 m).

Nonacho Lake level, all years

Loading chart…

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

Each year's lowest and highest level

345671962197019781986199420022010201820261962: lowest 3.93 m (1962-12-31), highest 4.55 m (1962-08-03), average 4.09 m, 19 days measured1963: lowest 3.36 m (1963-05-02), highest 4.37 m (1963-10-21), average 3.89 m, 232 days measured1964: lowest 3.44 m (1964-04-27), highest 4.51 m (1964-06-20), average 3.84 m, 330 days measured1965: lowest 3.09 m (1965-04-25), highest 4.29 m (1965-07-22), average 3.59 m, 339 days measured1966: lowest 3.07 m (1966-05-10), highest 4.11 m (1966-09-09), average 3.73 m, 280 days measured1967: lowest 3.16 m (1967-05-05), highest 4.23 m (1967-08-24), average 3.69 m, 291 days measured1968: lowest 3.43 m (1968-03-21), highest 6.41 m (1968-10-10), average 4.83 m, 226 days measured1969: lowest 5.48 m (1969-12-31), highest 6.23 m (1969-01-01), average 5.78 m, 141 days measured1970: lowest 4.97 m (1970-04-23), highest 6.18 m (1970-11-25), average 5.63 m, 304 days measured1971: lowest 5.74 m (1971-12-31), highest 6.12 m (1971-01-01), average 5.93 m, 365 days measured1972: lowest 5.40 m (1972-04-12), highest 6.38 m (1972-08-10), average 6.14 m, 179 days measured1973: lowest 5.66 m (1973-04-30), highest 6.30 m (1973-09-29), average 6.06 m, 365 days measured1974: lowest 5.62 m (1974-05-04), highest 6.48 m (1974-10-09), average 6.09 m, 335 days measured1975: lowest 5.81 m (1975-04-20), highest 6.75 m (1975-06-27), average 6.29 m, 301 days measured1976: lowest 5.61 m (1976-04-23), highest 6.54 m (1976-07-02), average 6.03 m, 366 days measured1977: lowest 5.36 m (1977-04-29), highest 6.04 m (1977-10-15), average 5.78 m, 365 days measured1978: lowest 5.42 m (1978-05-04), highest 6.08 m (1978-08-10), average 5.82 m, 365 days measured1979: lowest 5.36 m (1979-05-13), highest 6.22 m (1979-07-22), average 5.82 m, 365 days measured1980: lowest 5.33 m (1980-04-23), highest 5.80 m (1980-11-28), average 5.64 m, 366 days measured1981: lowest 5.51 m (1981-04-30), highest 6.49 m (1981-09-19), average 5.97 m, 303 days measured1982: lowest 5.83 m (1982-05-10), highest 6.88 m (1982-07-04), average 6.27 m, 365 days measured1983: lowest 5.69 m (1983-05-23), highest 6.37 m (1983-09-15), average 6.08 m, 365 days measured1984: lowest 5.79 m (1984-04-18), highest 6.35 m (1984-11-22), average 6.13 m, 366 days measured1985: lowest 5.88 m (1985-05-04), highest 6.73 m (1985-06-23), average 6.20 m, 365 days measured1986: lowest 5.36 m (1986-05-07), highest 6.28 m (1986-09-25), average 5.94 m, 365 days measured1987: lowest 5.86 m (1987-04-27), highest 6.40 m (1987-07-16), average 6.19 m, 365 days measured1988: lowest 5.90 m (1988-05-16), highest 6.97 m (1988-07-31), average 6.41 m, 366 days measured1989: lowest 5.93 m (1989-05-01), highest 6.41 m (1989-06-20), average 6.22 m, 365 days measured1990: lowest 5.88 m (1990-05-10), highest 6.34 m (1990-10-10), average 6.12 m, 283 days measured1991: lowest 6.03 m (1991-05-06), highest 6.92 m (1991-06-17), average 6.41 m, 337 days measured1992: lowest 6.08 m (1992-05-02), highest 6.79 m (1992-07-06), average 6.35 m, 366 days measured1993: lowest 5.88 m (1993-04-24), highest 6.40 m (1993-06-18), average 6.19 m, 365 days measured1994: lowest 5.90 m (1994-05-04), highest 6.53 m (1994-07-03), average 6.12 m, 365 days measured1995: lowest 5.76 m (1995-05-03), highest 6.52 m (1995-10-20), average 6.11 m, 365 days measured1996: lowest 5.98 m (1996-12-31), highest 6.55 m (1996-07-05), average 6.18 m, 366 days measured1997: lowest 5.73 m (1997-05-03), highest 6.33 m (1997-07-25), average 6.06 m, 365 days measured1998: lowest 5.93 m (1998-04-20), highest 6.43 m (1998-06-14), average 6.16 m, 365 days measured1999: lowest 5.91 m (1999-04-29), highest 6.55 m (1999-07-29), average 6.26 m, 365 days measured2000: lowest 5.91 m (2000-04-23), highest 6.57 m (2000-10-29), average 6.27 m, 366 days measured2001: lowest 5.94 m (2001-05-02), highest 6.76 m (2001-06-22), average 6.31 m, 365 days measured2002: lowest 5.83 m (2002-05-15), highest 6.46 m (2002-10-24), average 6.22 m, 365 days measured2003: lowest 5.92 m (2003-04-21), highest 6.87 m (2003-06-22), average 6.29 m, 365 days measured2004: lowest 5.82 m (2004-05-23), highest 6.50 m (2004-07-18), average 6.14 m, 366 days measured2005: lowest 5.88 m (2005-05-05), highest 6.58 m (2005-11-10), average 6.25 m, 365 days measured2006: lowest 6.09 m (2006-04-20), highest 6.91 m (2006-06-16), average 6.41 m, 365 days measured2007: lowest 6.04 m (2007-04-26), highest 6.78 m (2007-06-13), average 6.38 m, 365 days measured2008: lowest 6.04 m (2008-05-02), highest 6.46 m (2008-01-02), average 6.23 m, 366 days measured2009: lowest 5.86 m (2009-05-02), highest 6.25 m (2009-08-12), average 6.05 m, 365 days measured2010: lowest 5.91 m (2010-04-15), highest 6.29 m (2010-07-23), average 6.06 m, 365 days measured2011: lowest 5.77 m (2011-05-07), highest 6.03 m (2011-07-20), average 5.93 m, 353 days measured2012: lowest 5.92 m (2012-04-29), highest 6.52 m (2012-07-31), average 6.25 m, 366 days measured2013: lowest 5.99 m (2013-05-10), highest 6.70 m (2013-06-26), average 6.30 m, 365 days measured2014: lowest 5.91 m (2014-05-11), highest 6.51 m (2014-06-30), average 6.21 m, 365 days measured2015: lowest 5.97 m (2015-04-28), highest 6.34 m (2015-12-10), average 6.18 m, 365 days measured2016: lowest 6.05 m (2016-04-27), highest 6.72 m (2016-06-23), average 6.43 m, 366 days measured2017: lowest 6.04 m (2017-12-31), highest 6.69 m (2017-07-05), average 6.31 m, 365 days measured2018: lowest 5.84 m (2018-04-23), highest 6.52 m (2018-08-08), average 6.15 m, 365 days measured2019: lowest 5.92 m (2019-04-11), highest 6.22 m (2019-07-18), average 6.08 m, 365 days measured2020: lowest 5.95 m (2020-05-03), highest 6.95 m (2020-11-03), average 6.46 m, 366 days measured2021: lowest 6.16 m (2021-05-09), highest 7.04 m (2021-07-16), average 6.59 m, 365 days measured2022: lowest 5.82 m (2022-05-05), highest 6.40 m (2022-01-01), average 6.15 m, 365 days measured2023: lowest 5.98 m (2023-04-26), highest 6.46 m (2023-07-02), average 6.17 m, 365 days measured2024: lowest 5.86 m (2024-05-04), highest 6.24 m (2024-12-06), average 6.08 m, 366 days measured2026: lowest 6.27 m (2026-09-24), highest 6.35 m (2026-10-21), average 6.32 m, 30 days measured
34567196219781994201020261962: lowest 3.93 m (1962-12-31), highest 4.55 m (1962-08-03), average 4.09 m, 19 days measured1963: lowest 3.36 m (1963-05-02), highest 4.37 m (1963-10-21), average 3.89 m, 232 days measured1964: lowest 3.44 m (1964-04-27), highest 4.51 m (1964-06-20), average 3.84 m, 330 days measured1965: lowest 3.09 m (1965-04-25), highest 4.29 m (1965-07-22), average 3.59 m, 339 days measured1966: lowest 3.07 m (1966-05-10), highest 4.11 m (1966-09-09), average 3.73 m, 280 days measured1967: lowest 3.16 m (1967-05-05), highest 4.23 m (1967-08-24), average 3.69 m, 291 days measured1968: lowest 3.43 m (1968-03-21), highest 6.41 m (1968-10-10), average 4.83 m, 226 days measured1969: lowest 5.48 m (1969-12-31), highest 6.23 m (1969-01-01), average 5.78 m, 141 days measured1970: lowest 4.97 m (1970-04-23), highest 6.18 m (1970-11-25), average 5.63 m, 304 days measured1971: lowest 5.74 m (1971-12-31), highest 6.12 m (1971-01-01), average 5.93 m, 365 days measured1972: lowest 5.40 m (1972-04-12), highest 6.38 m (1972-08-10), average 6.14 m, 179 days measured1973: lowest 5.66 m (1973-04-30), highest 6.30 m (1973-09-29), average 6.06 m, 365 days measured1974: lowest 5.62 m (1974-05-04), highest 6.48 m (1974-10-09), average 6.09 m, 335 days measured1975: lowest 5.81 m (1975-04-20), highest 6.75 m (1975-06-27), average 6.29 m, 301 days measured1976: lowest 5.61 m (1976-04-23), highest 6.54 m (1976-07-02), average 6.03 m, 366 days measured1977: lowest 5.36 m (1977-04-29), highest 6.04 m (1977-10-15), average 5.78 m, 365 days measured1978: lowest 5.42 m (1978-05-04), highest 6.08 m (1978-08-10), average 5.82 m, 365 days measured1979: lowest 5.36 m (1979-05-13), highest 6.22 m (1979-07-22), average 5.82 m, 365 days measured1980: lowest 5.33 m (1980-04-23), highest 5.80 m (1980-11-28), average 5.64 m, 366 days measured1981: lowest 5.51 m (1981-04-30), highest 6.49 m (1981-09-19), average 5.97 m, 303 days measured1982: lowest 5.83 m (1982-05-10), highest 6.88 m (1982-07-04), average 6.27 m, 365 days measured1983: lowest 5.69 m (1983-05-23), highest 6.37 m (1983-09-15), average 6.08 m, 365 days measured1984: lowest 5.79 m (1984-04-18), highest 6.35 m (1984-11-22), average 6.13 m, 366 days measured1985: lowest 5.88 m (1985-05-04), highest 6.73 m (1985-06-23), average 6.20 m, 365 days measured1986: lowest 5.36 m (1986-05-07), highest 6.28 m (1986-09-25), average 5.94 m, 365 days measured1987: lowest 5.86 m (1987-04-27), highest 6.40 m (1987-07-16), average 6.19 m, 365 days measured1988: lowest 5.90 m (1988-05-16), highest 6.97 m (1988-07-31), average 6.41 m, 366 days measured1989: lowest 5.93 m (1989-05-01), highest 6.41 m (1989-06-20), average 6.22 m, 365 days measured1990: lowest 5.88 m (1990-05-10), highest 6.34 m (1990-10-10), average 6.12 m, 283 days measured1991: lowest 6.03 m (1991-05-06), highest 6.92 m (1991-06-17), average 6.41 m, 337 days measured1992: lowest 6.08 m (1992-05-02), highest 6.79 m (1992-07-06), average 6.35 m, 366 days measured1993: lowest 5.88 m (1993-04-24), highest 6.40 m (1993-06-18), average 6.19 m, 365 days measured1994: lowest 5.90 m (1994-05-04), highest 6.53 m (1994-07-03), average 6.12 m, 365 days measured1995: lowest 5.76 m (1995-05-03), highest 6.52 m (1995-10-20), average 6.11 m, 365 days measured1996: lowest 5.98 m (1996-12-31), highest 6.55 m (1996-07-05), average 6.18 m, 366 days measured1997: lowest 5.73 m (1997-05-03), highest 6.33 m (1997-07-25), average 6.06 m, 365 days measured1998: lowest 5.93 m (1998-04-20), highest 6.43 m (1998-06-14), average 6.16 m, 365 days measured1999: lowest 5.91 m (1999-04-29), highest 6.55 m (1999-07-29), average 6.26 m, 365 days measured2000: lowest 5.91 m (2000-04-23), highest 6.57 m (2000-10-29), average 6.27 m, 366 days measured2001: lowest 5.94 m (2001-05-02), highest 6.76 m (2001-06-22), average 6.31 m, 365 days measured2002: lowest 5.83 m (2002-05-15), highest 6.46 m (2002-10-24), average 6.22 m, 365 days measured2003: lowest 5.92 m (2003-04-21), highest 6.87 m (2003-06-22), average 6.29 m, 365 days measured2004: lowest 5.82 m (2004-05-23), highest 6.50 m (2004-07-18), average 6.14 m, 366 days measured2005: lowest 5.88 m (2005-05-05), highest 6.58 m (2005-11-10), average 6.25 m, 365 days measured2006: lowest 6.09 m (2006-04-20), highest 6.91 m (2006-06-16), average 6.41 m, 365 days measured2007: lowest 6.04 m (2007-04-26), highest 6.78 m (2007-06-13), average 6.38 m, 365 days measured2008: lowest 6.04 m (2008-05-02), highest 6.46 m (2008-01-02), average 6.23 m, 366 days measured2009: lowest 5.86 m (2009-05-02), highest 6.25 m (2009-08-12), average 6.05 m, 365 days measured2010: lowest 5.91 m (2010-04-15), highest 6.29 m (2010-07-23), average 6.06 m, 365 days measured2011: lowest 5.77 m (2011-05-07), highest 6.03 m (2011-07-20), average 5.93 m, 353 days measured2012: lowest 5.92 m (2012-04-29), highest 6.52 m (2012-07-31), average 6.25 m, 366 days measured2013: lowest 5.99 m (2013-05-10), highest 6.70 m (2013-06-26), average 6.30 m, 365 days measured2014: lowest 5.91 m (2014-05-11), highest 6.51 m (2014-06-30), average 6.21 m, 365 days measured2015: lowest 5.97 m (2015-04-28), highest 6.34 m (2015-12-10), average 6.18 m, 365 days measured2016: lowest 6.05 m (2016-04-27), highest 6.72 m (2016-06-23), average 6.43 m, 366 days measured2017: lowest 6.04 m (2017-12-31), highest 6.69 m (2017-07-05), average 6.31 m, 365 days measured2018: lowest 5.84 m (2018-04-23), highest 6.52 m (2018-08-08), average 6.15 m, 365 days measured2019: lowest 5.92 m (2019-04-11), highest 6.22 m (2019-07-18), average 6.08 m, 365 days measured2020: lowest 5.95 m (2020-05-03), highest 6.95 m (2020-11-03), average 6.46 m, 366 days measured2021: lowest 6.16 m (2021-05-09), highest 7.04 m (2021-07-16), average 6.59 m, 365 days measured2022: lowest 5.82 m (2022-05-05), highest 6.40 m (2022-01-01), average 6.15 m, 365 days measured2023: lowest 5.98 m (2023-04-26), highest 6.46 m (2023-07-02), average 6.17 m, 365 days measured2024: lowest 5.86 m (2024-05-04), highest 6.24 m (2024-12-06), average 6.08 m, 366 days measured2026: lowest 6.27 m (2026-09-24), highest 6.35 m (2026-10-21), average 6.32 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.

  • 19653.088 m on Apr 25
  • 19643.435 m on Apr 27
  • 19805.332 m on Apr 23
  • 19795.356 m on May 13
  • 19775.361 m on Apr 29

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (30 days)6.3176.269Sep 246.352Oct 21
20246.0795.857May 46.242Dec 6
20236.1695.983Apr 266.462Jul 2
20226.1515.823May 56.399Jan 1
20216.5896.155May 97.038Jul 16
20206.4585.950May 36.947Nov 3
20196.0835.919Apr 116.218Jul 18
20186.1495.843Apr 236.516Aug 8
20176.3146.043Dec 316.691Jul 5
20166.4336.047Apr 276.716Jun 23
20156.1815.973Apr 286.342Dec 10
20146.2085.908May 116.510Jun 30
20136.3035.986May 106.702Jun 26
20126.2515.917Apr 296.523Jul 31
20115.9315.774May 76.030Jul 20
20106.0555.906Apr 156.285Jul 23
20096.0495.865May 26.254Aug 12
20086.2266.042May 26.458Jan 2
20076.3776.035Apr 266.778Jun 13
20066.4106.086Apr 206.906Jun 16
20056.2535.879May 56.579Nov 10
20046.1405.817May 236.498Jul 18
20036.2955.919Apr 216.866Jun 22
20026.2155.827May 156.465Oct 24
20016.3115.937May 26.759Jun 22
20006.2735.909Apr 236.573Oct 29
19996.2565.910Apr 296.550Jul 29
19986.1645.927Apr 206.431Jun 14
19976.0645.735May 36.329Jul 25
19966.1795.976Dec 316.546Jul 5
19956.1125.757May 36.523Oct 20
19946.1165.902May 46.533Jul 3
19936.1905.883Apr 246.398Jun 18
19926.3506.080May 26.790Jul 6
19916.4146.027May 66.922Jun 17
1990 (283 days)6.1195.883May 106.345Oct 10
19896.2175.925May 16.412Jun 20
19886.4115.904May 166.968Jul 31
19876.1885.856Apr 276.404Jul 16
19865.9395.364May 76.283Sep 25
19856.1975.881May 46.732Jun 23
19846.1335.787Apr 186.350Nov 22
19836.0765.689May 236.370Sep 15
19826.2675.830May 106.878Jul 4
1981 (303 days)5.9715.513Apr 306.490Sep 19
19805.6415.332Apr 235.802Nov 28
19795.8215.356May 136.218Jul 22
19785.8225.419May 46.078Aug 10
19775.7805.361Apr 296.035Oct 15
19766.0325.611Apr 236.538Jul 2
1975 (301 days)6.2865.809Apr 206.751Jun 27
19746.0895.624May 46.477Oct 9
19736.0565.657Apr 306.297Sep 29
1972 (179 days)6.1455.401Apr 126.376Aug 10
19715.9295.736Dec 316.123Jan 1
1970 (304 days)5.6354.968Apr 236.181Nov 25
1969 (141 days)5.7765.477Dec 316.233Jan 1
1968 (226 days)4.8333.426Mar 216.413Oct 10
1967 (291 days)3.6903.158May 54.228Aug 24
1966 (280 days)3.7253.066May 104.106Sep 9
19653.5923.088Apr 254.285Jul 22
19643.8423.435Apr 274.514Jun 20
1963 (232 days)3.8883.362May 24.371Oct 21
1962 (19 days)4.0903.935Dec 314.551Aug 3

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

Monthly averages

MonthAverageLowestHighest
January5.9823.3716.698
February5.8773.2466.539
March5.7053.1336.403
April5.6063.0856.282
May5.7013.0666.834
June6.1273.3506.974
July6.1903.8987.038
August6.1303.9176.968
September6.1093.7006.843
October6.0913.5816.942
November6.1133.5426.947
December6.0253.4566.878

Download

Daily levels as CSV (21,451 rows; credit the original agencies listed below)