Lake Koocanusa water level history

Daily records since 1989 · Level today: 2,443.98 ft

Highest on record

2,459.95 ft

Jul 16, 2012

Lowest on record

2,305.27 ft

Apr 4, 1991

Today

2,443.98 ft

Oct 21, 2026

Years of data

since 1989

In short

Across 36 complete years, 1993 had the lowest average level (2,389.64 ft) and 2024 the highest (2,433.95 ft).

On average the lake is lowest in April (2,381.69 ft) and highest in August (2,448.40 ft).

Lake Koocanusa level, all years

Loading chart…

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

Lowest years

Years ranked by their lowest daily level.

19912,305.27 ft on Apr 4
19992,321.34 ft on Mar 22
19932,322.99 ft on Mar 24
19902,325.45 ft on Mar 30
19972,333.88 ft on Mar 19

Yearly highs and lows

Year	Average	Low	Low date	High	High date
2026 (290 days)	2,413.56	2,369.39	Apr 22	2,448.93	Jul 31
2025	2,429.06	2,405.41	Mar 27	2,449.57	Aug 12
2024	2,433.95	2,414.54	Dec 31	2,456.14	Jul 21
2023	2,429.48	2,401.52	Apr 10	2,452.35	Jul 14
2022	2,412.53	2,363.52	Mar 1	2,454.28	Aug 5
2021	2,429.07	2,401.02	Apr 6	2,453.91	Jul 25
2020	2,429.81	2,403.14	Apr 17	2,451.67	Aug 9
2019	2,426.05	2,405.72	Mar 26	2,443.18	Oct 26
2018	2,417.49	2,357.54	Apr 9	2,448.08	Jul 25
2017	2,417.13	2,359.32	May 5	2,448.62	Aug 1
2016	2,427.92	2,397.42	Apr 20	2,455.05	Nov 8
2015	2,429.21	2,409.70	Feb 5	2,444.01	Jul 15
2014	2,430.27	2,385.96	May 3	2,453.68	Aug 7
2013	2,427.36	2,393.46	Mar 13	2,457.73	Jul 5
2012	2,428.55	2,380.91	Apr 23	2,459.95	Jul 16
2011	2,412.27	2,337.69	May 12	2,453.37	Aug 4
2010	2,424.00	2,402.39	Apr 18	2,442.92	Aug 17
2009	2,423.70	2,402.78	Apr 9	2,443.30	Aug 25
2008	2,422.91	2,395.06	Apr 14	2,444.82	Jul 16
2007	2,419.72	2,386.09	Apr 30	2,454.22	Jul 21
2006	2,430.48	2,403.57	Apr 7	2,459.11	Jun 18
2005	2,431.20	2,408.28	Jan 19	2,458.34	Jul 10
2004	2,426.75	2,398.42	Mar 23	2,450.31	Jul 22
2003	2,427.11	2,404.25	Mar 31	2,458.10	Jul 3
2002	2,417.06	2,370.41	Apr 6	2,458.60	Jul 16
2001	2,414.44	2,385.46	Apr 25	2,436.57	Aug 3
2000	2,398.56	2,336.68	Mar 23	2,436.33	Aug 15
1999	2,402.36	2,321.34	Mar 22	2,458.98	Aug 10
1998	2,424.91	2,390.92	Mar 22	2,458.32	Jul 17
1997	2,405.37	2,333.88	Mar 19	2,454.57	Aug 12
1996	2,412.78	2,362.36	Apr 24	2,458.97	Aug 1
1995	2,421.59	2,380.78	Feb 19	2,456.93	Oct 26
1994	2,410.03	2,364.91	Mar 16	2,447.26	Sep 6
1993	2,389.64	2,322.99	Mar 24	2,448.22	Sep 7
1992	2,395.35	2,359.61	Dec 31	2,439.92	Aug 10
1991	2,391.44	2,305.27	Apr 4	2,458.92	Aug 8
1990	2,406.81	2,325.45	Mar 30	2,458.99	Jul 27
1989 (1 days)	2,389.42	2,389.42	Dec 31	2,389.42	Dec 31

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

Monthly averages

Month	Average	Lowest	Highest
January	2,402.53	2,347.93	2,426.37
February	2,391.82	2,324.61	2,424.88
March	2,383.67	2,306.53	2,423.12
April	2,381.69	2,305.27	2,422.18
May	2,396.56	2,313.89	2,449.75
June	2,428.94	2,368.16	2,459.11
July	2,447.07	2,411.71	2,459.95
August	2,448.40	2,434.60	2,458.98
September	2,444.76	2,420.94	2,458.76
October	2,441.94	2,408.36	2,456.93
November	2,436.21	2,384.13	2,455.05
December	2,419.42	2,359.61	2,443.15

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Daily levels as CSV (13,440 rows; credit the original agencies listed below)