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Portland water levels in 2009
Annual rank15 / 114
vs. average9.3 cm
Highest monthly peak2.30 mDecember 2009
Monthly mean vs. previous year
| Month | 2009 (cm) | 2008 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -1.8 | -5.9 | 4.1 | 2.21 |
| Feb | 2.5 | -7.1 | 9.6 | 2.05 |
| Mar | -2.1 | -6.0 | 3.9 | 1.98 |
| Apr | 3.6 | -4.5 | 8.1 | 1.96 |
| May | 2.6 | 9.2 | -6.6 | 1.96 |
| Jun | 14.2 | 4.5 | 9.7 | 2.27 |
| Jul | 13.9 | 1.5 | 12.4 | 2.15 |
| Aug | 6.6 | 6.2 | 0.4 | 2.08 |
| Sep | 6.8 | 3.9 | 2.9 | 1.92 |
| Oct | 12.8 | 8.4 | 4.4 | 2.08 |
| Nov | 8.9 | 5.5 | 3.4 | 1.94 |
| Dec | 8.9 | -3.8 | 12.7 | 2.30 |
Nearby years (cm vs. average)
+4.3
+9.9
+7.4
+1.9
+3.9
+9.3
+16.7
+12.0
+11.4
+9.6
+8.8
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2009 annual mean water level ranked 15 of 114 years (9.3 cm vs. the period average).