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Portland water levels in 2021
Annual rank8 / 114
vs. average11.3 cm
Highest monthly peak2.24 mApril 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 11.5 | 8.4 | 3.1 | 2.22 |
| Feb | 3.7 | 4.0 | -0.3 | 2.12 |
| Mar | -4.5 | 6.7 | -11.2 | 2.06 |
| Apr | 10.9 | 17.2 | -6.3 | 2.24 |
| May | 3.7 | 4.4 | -0.7 | 2.09 |
| Jun | 6.9 | 10.8 | -3.9 | 2.02 |
| Jul | 11.9 | 13.4 | -1.5 | 2.05 |
| Aug | 10.9 | 11.0 | -0.1 | 2.03 |
| Sep | 11.5 | 6.7 | 4.8 | 1.84 |
| Oct | 19.5 | 5.5 | 14.0 | 1.97 |
| Nov | 10.2 | 2.4 | 7.8 | 2.06 |
| Dec | 4.3 | 7.3 | -3.0 | 2.18 |
Nearby years (cm vs. average)
+7.1
+10.3
+10.2
+11.5
+11.0
+11.3
+10.3
+18.3
+16.8
+11.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 8 of 114 years (11.3 cm vs. the period average).