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Apra Harbor, Guam water levels in 1990
Annual rank70 / 73
vs. average-12.2 cm
Highest monthly peak0.41 mSeptember 1990
Monthly mean vs. previous year
| Month | 1990 (cm) | 1989 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -22.2 | 12.8 | -35.0 | 0.30 |
| Feb | -12.2 | 10.7 | -22.9 | 0.25 |
| Mar | -5.8 | 10.7 | -16.5 | 0.34 |
| Apr | -8.2 | 9.4 | -17.6 | 0.34 |
| May | -6.1 | 2.4 | -8.5 | 0.34 |
| Jun | -3.7 | -0.3 | -3.4 | 0.36 |
| Jul | -5.8 | 2.1 | -7.9 | 0.35 |
| Aug | -3.0 | 2.4 | -5.4 | 0.32 |
| Sep | -5.8 | -3.4 | -2.4 | 0.41 |
| Oct | -11.9 | -7.6 | -4.3 | 0.32 |
| Nov | -7.3 | -15.5 | 8.2 | 0.33 |
| Dec | -15.5 | -8.5 | -7.0 | 0.30 |
Nearby years (cm vs. average)
-1.2
-7.6
-11.7
+0.1
-2.0
-12.2
-12.1
-12.0
-4.0
-0.1
-3.5
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1990 annual mean water level ranked 70 of 73 years (-12.2 cm vs. the period average).