Dewey Lake water level history
Daily records since 2020 · Level today: 650.38 ft
Highest on record
670.58 ft
Mar 4, 2021
Lowest on record
640.02 ft
Feb 24, 2026
Today
650.38 ft
Oct 21, 2026
Years of data
6
since 2020
In short
Across 5 complete years, 2024 had the lowest average level (648.44 ft) and 2021 the highest (649.47 ft).
On average the lake is lowest in January (645.35 ft) and highest in August (650.87 ft).
Dewey Lake 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.
- 2025
- 2024
- 2022
- 2021
- 2023
Yearly highs and lows
| Year | Average | Low | Low date | High | High date |
|---|---|---|---|---|---|
| 2026 (292 days) | 647.26 | 640.02 | Feb 24 | 651.48 | Jul 13 |
| 2025 | 648.95 | 643.05 | Jan 18 | 668.44 | Feb 19 |
| 2024 | 648.44 | 643.06 | Mar 6 | 651.91 | Apr 13 |
| 2023 | 649.00 | 645.36 | Jan 23 | 662.77 | Feb 19 |
| 2022 | 649.45 | 645.27 | Feb 14 | 665.64 | Aug 3 |
| 2021 | 649.47 | 645.28 | Dec 27 | 670.58 | Mar 4 |
| 2020 (138 days) | 649.14 | 645.50 | Dec 21 | 651.07 | Sep 1 |
Levels in feet. Partial years show the number of days with data.
Monthly averages
| Month | Average | Lowest | Highest |
|---|---|---|---|
| January | 645.35 | 643.01 | 657.13 |
| February | 646.71 | 640.02 | 668.44 |
| March | 645.70 | 640.07 | 670.58 |
| April | 649.30 | 640.67 | 653.68 |
| May | 650.38 | 648.28 | 654.69 |
| June | 650.56 | 650.26 | 651.85 |
| July | 650.70 | 650.14 | 658.75 |
| August | 650.87 | 650.29 | 665.64 |
| September | 650.52 | 650.28 | 652.14 |
| October | 650.49 | 650.18 | 650.77 |
| November | 648.69 | 645.49 | 651.34 |
| December | 645.94 | 643.12 | 650.61 |
Download
Daily levels as CSV (2,256 rows; credit the original agencies listed below)