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Ketchikan water levels in 2021
Annual rank33 / 105
vs. average1.4 cm
Highest monthly peak3.71 mNovember 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 21.3 | 11.8 | 9.5 | 3.37 |
| Feb | -3.4 | -5.5 | 2.1 | 2.84 |
| Mar | -4.7 | -10.7 | 6.0 | 3.01 |
| Apr | -16.6 | -18.2 | 1.6 | 3.38 |
| May | -12.6 | -5.6 | -7.0 | 3.35 |
| Jun | -3.1 | -5.5 | 2.4 | 3.08 |
| Jul | -11.1 | -6.3 | -4.8 | 2.97 |
| Aug | -8.1 | 1.1 | -9.2 | 2.77 |
| Sep | 6.8 | -1.7 | 8.5 | 2.93 |
| Oct | 17.7 | -5.9 | 23.6 | 3.34 |
| Nov | 19.7 | 9.4 | 10.3 | 3.71 |
| Dec | 6.9 | 16.4 | -9.5 | 3.34 |
Nearby years (cm vs. average)
-1.9
-4.1
-8.0
-5.7
-1.4
+1.4
-2.9
+0.2
-1.5
-1.5
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 33 of 105 years (1.4 cm vs. the period average).