Priest Rapids Lake water level history

Daily records since 1990 · Level today: 485.19 ft

Highest on record

490.24 ft

Jun 7, 1991

Lowest on record

406.47 ft

Oct 5, 2007

Today

485.19 ft

Oct 21, 2026

Years of data

since 1990

In short

Across 36 complete years, 2018 had the lowest average level (484.80 ft) and 1991 the highest (487.10 ft).

On average the lake is lowest in November (485.57 ft) and highest in June (486.64 ft).

Loading chart…

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

Years ranked by their lowest daily level.

Year	Average	Low	Low date	High	High date
2026 (290 days)	485.82	483.34	Apr 23	487.55	Feb 25
2025	485.60	483.07	Feb 4	487.54	Dec 19
2024	485.38	482.70	Feb 25	487.54	Feb 15
2023	485.43	482.79	Jan 1	487.53	Apr 21
2022	486.02	483.13	Oct 25	487.66	Jan 21
2021	485.87	482.82	Apr 11	487.70	Jan 29
2020	486.04	482.66	Apr 13	487.72	Jun 7
2019	485.48	482.96	Apr 6	487.35	Feb 24
2018	484.80	482.66	Mar 31	487.82	Feb 14
2017	486.39	482.83	Nov 7	487.77	May 28
2016	486.38	483.15	May 2	487.80	Dec 27
2015	486.25	482.72	Dec 14	487.75	Feb 17
2014	485.94	482.78	Oct 18	487.80	Jul 26
2013	486.43	482.23	Oct 13	487.75	Jan 23
2012	485.99	483.24	May 6	487.79	Aug 17
2011	486.35	483.60	May 11	489.90	Jul 7
2010	486.11	483.63	May 11	487.81	Jun 24
2009	486.06	483.29	Apr 6	487.34	Sep 23
2008	485.99	466.84	Jun 15	487.62	Jun 21
2007	485.82	406.47	Oct 5	487.87	Mar 25
2006	486.15	483.48	May 16	487.63	Apr 23
2005	486.22	483.35	Nov 10	487.49	May 15
2004	486.43	483.10	Oct 24	487.82	Apr 3
2003	486.30	475.71	Nov 6	487.89	Apr 11
2002	486.57	483.84	Jul 10	487.97	Apr 16
2001	486.51	484.01	Mar 27	487.44	Mar 21
2000	486.73	484.02	Oct 22	487.93	Feb 10
1999	486.72	483.67	Nov 8	488.01	Jun 30
1998	486.73	483.70	Apr 25	487.88	Dec 23
1997	487.07	484.52	Sep 8	488.16	Jan 15
1996	487.07	483.29	Dec 14	488.23	May 30
1995	486.90	483.35	Oct 15	488.16	Dec 23
1994	486.63	483.56	Oct 24	488.10	Jun 4
1993	486.57	483.39	Oct 11	488.14	Jun 4
1992	486.71	483.34	Oct 13	488.11	Jun 30
1991	487.10	483.52	Oct 15	490.24	Jun 7
1990	486.62	483.18	Oct 15	489.67	Jun 9

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

Month	Average	Lowest	Highest
January	486.48	482.79	488.18
February	486.40	482.58	488.12
March	486.18	482.66	488.14
April	486.10	482.66	488.09
May	486.34	482.74	488.23
June	486.64	466.84	490.24
July	486.49	482.71	489.90
August	486.38	483.25	487.93
September	486.32	482.90	488.04
October	485.67	406.47	487.93
November	485.57	475.71	487.94
December	486.43	482.72	488.16

Daily levels as CSV (13,426 rows; credit the original agencies listed below)