Country: USA
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Monticello Reservoir water level history

Daily records since 2000 · Level today: 334.49 ft

Highest on record
342.72 ft
Dec 28, 2015
Lowest on record
334.53 ft
Oct 21, 2026
Today
334.49 ft
Oct 23, 2026
Years of data
26
since 2000

In short

Across 25 complete years, 2022 had the lowest average level (336.23 ft) and 2015 the highest (340.45 ft).

On average the lake is lowest in October (338.61 ft) and highest in May (339.23 ft).

Monticello Reservoir level, all years

Loading chart…

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

Each year's lowest and highest level

33433633934134320002003200620092012201520182021202420262000: lowest 339.57 ft (2000-11-01), highest 340.58 ft (2000-11-08), average 339.93 ft, 92 days measured2001: lowest 338.70 ft (2001-11-27), highest 341.08 ft (2001-02-16), average 339.97 ft, 365 days measured2002: lowest 338.58 ft (2002-11-27), highest 340.72 ft (2002-08-24), average 339.79 ft, 365 days measured2003: lowest 338.90 ft (2003-05-19), highest 340.75 ft (2003-09-12), average 339.81 ft, 365 days measured2004: lowest 338.62 ft (2004-12-21), highest 341.23 ft (2004-06-06), average 339.97 ft, 359 days measured2005: lowest 338.67 ft (2005-03-18), highest 340.84 ft (2005-08-27), average 339.86 ft, 361 days measured2006: lowest 338.84 ft (2006-11-12), highest 340.77 ft (2006-09-18), average 339.83 ft, 362 days measured2007: lowest 338.72 ft (2007-03-30), highest 341.15 ft (2007-06-03), average 339.94 ft, 351 days measured2008: lowest 338.73 ft (2008-01-14), highest 341.20 ft (2008-05-15), average 339.89 ft, 366 days measured2009: lowest 338.79 ft (2009-02-26), highest 341.44 ft (2009-05-03), average 340.21 ft, 365 days measured2010: lowest 339.30 ft (2010-12-10), highest 341.04 ft (2010-02-04), average 340.21 ft, 365 days measured2011: lowest 338.61 ft (2011-03-28), highest 341.10 ft (2011-08-27), average 339.78 ft, 352 days measured2012: lowest 338.63 ft (2012-10-31), highest 340.88 ft (2012-03-16), average 340.04 ft, 366 days measured2013: lowest 339.75 ft (2013-09-19), highest 341.26 ft (2013-12-07), average 340.39 ft, 361 days measured2014: lowest 338.87 ft (2014-08-04), highest 341.04 ft (2014-03-19), average 340.09 ft, 365 days measured2015: lowest 339.48 ft (2015-10-07), highest 342.72 ft (2015-12-28), average 340.45 ft, 365 days measured2016: lowest 339.56 ft (2016-10-01), highest 341.73 ft (2016-04-30), average 340.24 ft, 366 days measured2017: lowest 339.40 ft (2017-12-16), highest 341.47 ft (2017-04-11), average 340.15 ft, 364 days measured2018: lowest 335.94 ft (2018-09-02), highest 340.18 ft (2018-02-25), average 337.42 ft, 365 days measured2019: lowest 336.27 ft (2019-10-10), highest 339.61 ft (2019-05-09), average 337.30 ft, 362 days measured2020: lowest 336.43 ft (2020-12-01), highest 338.86 ft (2020-02-13), average 337.27 ft, 366 days measured2021: lowest 335.61 ft (2021-12-06), highest 339.12 ft (2021-05-20), average 337.06 ft, 361 days measured2022: lowest 335.38 ft (2022-10-22), highest 337.18 ft (2022-05-07), average 336.23 ft, 363 days measured2023: lowest 335.68 ft (2023-10-25), highest 338.26 ft (2023-06-14), average 336.80 ft, 365 days measured2024: lowest 336.12 ft (2024-10-30), highest 339.62 ft (2024-06-05), average 337.18 ft, 366 days measured2025: lowest 335.87 ft (2025-11-14), highest 338.70 ft (2025-05-07), average 337.07 ft, 365 days measured2026: lowest 334.53 ft (2026-10-21), highest 336.75 ft (2026-06-23), average 336.01 ft, 294 days measured
334336339341343200020072014202120262000: lowest 339.57 ft (2000-11-01), highest 340.58 ft (2000-11-08), average 339.93 ft, 92 days measured2001: lowest 338.70 ft (2001-11-27), highest 341.08 ft (2001-02-16), average 339.97 ft, 365 days measured2002: lowest 338.58 ft (2002-11-27), highest 340.72 ft (2002-08-24), average 339.79 ft, 365 days measured2003: lowest 338.90 ft (2003-05-19), highest 340.75 ft (2003-09-12), average 339.81 ft, 365 days measured2004: lowest 338.62 ft (2004-12-21), highest 341.23 ft (2004-06-06), average 339.97 ft, 359 days measured2005: lowest 338.67 ft (2005-03-18), highest 340.84 ft (2005-08-27), average 339.86 ft, 361 days measured2006: lowest 338.84 ft (2006-11-12), highest 340.77 ft (2006-09-18), average 339.83 ft, 362 days measured2007: lowest 338.72 ft (2007-03-30), highest 341.15 ft (2007-06-03), average 339.94 ft, 351 days measured2008: lowest 338.73 ft (2008-01-14), highest 341.20 ft (2008-05-15), average 339.89 ft, 366 days measured2009: lowest 338.79 ft (2009-02-26), highest 341.44 ft (2009-05-03), average 340.21 ft, 365 days measured2010: lowest 339.30 ft (2010-12-10), highest 341.04 ft (2010-02-04), average 340.21 ft, 365 days measured2011: lowest 338.61 ft (2011-03-28), highest 341.10 ft (2011-08-27), average 339.78 ft, 352 days measured2012: lowest 338.63 ft (2012-10-31), highest 340.88 ft (2012-03-16), average 340.04 ft, 366 days measured2013: lowest 339.75 ft (2013-09-19), highest 341.26 ft (2013-12-07), average 340.39 ft, 361 days measured2014: lowest 338.87 ft (2014-08-04), highest 341.04 ft (2014-03-19), average 340.09 ft, 365 days measured2015: lowest 339.48 ft (2015-10-07), highest 342.72 ft (2015-12-28), average 340.45 ft, 365 days measured2016: lowest 339.56 ft (2016-10-01), highest 341.73 ft (2016-04-30), average 340.24 ft, 366 days measured2017: lowest 339.40 ft (2017-12-16), highest 341.47 ft (2017-04-11), average 340.15 ft, 364 days measured2018: lowest 335.94 ft (2018-09-02), highest 340.18 ft (2018-02-25), average 337.42 ft, 365 days measured2019: lowest 336.27 ft (2019-10-10), highest 339.61 ft (2019-05-09), average 337.30 ft, 362 days measured2020: lowest 336.43 ft (2020-12-01), highest 338.86 ft (2020-02-13), average 337.27 ft, 366 days measured2021: lowest 335.61 ft (2021-12-06), highest 339.12 ft (2021-05-20), average 337.06 ft, 361 days measured2022: lowest 335.38 ft (2022-10-22), highest 337.18 ft (2022-05-07), average 336.23 ft, 363 days measured2023: lowest 335.68 ft (2023-10-25), highest 338.26 ft (2023-06-14), average 336.80 ft, 365 days measured2024: lowest 336.12 ft (2024-10-30), highest 339.62 ft (2024-06-05), average 337.18 ft, 366 days measured2025: lowest 335.87 ft (2025-11-14), highest 338.70 ft (2025-05-07), average 337.07 ft, 365 days measured2026: lowest 334.53 ft (2026-10-21), highest 336.75 ft (2026-06-23), average 336.01 ft, 294 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.

  • 2022335.38 ft on Oct 22
  • 2021335.61 ft on Dec 6
  • 2023335.68 ft on Oct 25
  • 2025335.87 ft on Nov 14
  • 2018335.94 ft on Sep 2

Yearly highs and lows

YearAverageLowLow dateHighHigh date
2026 (294 days)336.01334.53Oct 21336.75Jun 23
2025337.07335.87Nov 14338.70May 7
2024337.18336.12Oct 30339.62Jun 5
2023336.80335.68Oct 25338.26Jun 14
2022336.23335.38Oct 22337.18May 7
2021337.06335.61Dec 6339.12May 20
2020337.27336.43Dec 1338.86Feb 13
2019337.30336.27Oct 10339.61May 9
2018337.42335.94Sep 2340.18Feb 25
2017340.15339.40Dec 16341.47Apr 11
2016340.24339.56Oct 1341.73Apr 30
2015340.45339.48Oct 7342.72Dec 28
2014340.09338.87Aug 4341.04Mar 19
2013340.39339.75Sep 19341.26Dec 7
2012340.04338.63Oct 31340.88Mar 16
2011339.78338.61Mar 28341.10Aug 27
2010340.21339.30Dec 10341.04Feb 4
2009340.21338.79Feb 26341.44May 3
2008339.89338.73Jan 14341.20May 15
2007339.94338.72Mar 30341.15Jun 3
2006339.83338.84Nov 12340.77Sep 18
2005339.86338.67Mar 18340.84Aug 27
2004339.97338.62Dec 21341.23Jun 6
2003339.81338.90May 19340.75Sep 12
2002339.79338.58Nov 27340.72Aug 24
2001339.97338.70Nov 27341.08Feb 16
2000 (92 days)339.93339.57Nov 1340.58Nov 8

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

Monthly averages

MonthAverageLowestHighest
January338.91335.77340.92
February339.12335.78341.20
March339.14335.98341.48
April339.17336.00341.73
May339.23336.45341.44
June339.21336.58341.23
July339.13335.88341.04
August339.05335.47341.40
September338.88334.79341.10
October338.61334.53341.27
November338.71335.59341.59
December338.72335.61342.72

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Daily levels as CSV (9,462 rows; credit the original agencies listed below)