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Nantucket water levels in 1991
Annual rank34 / 60
vs. average-2.0 cm
Highest monthly peak1.86 mOctober 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -4.6 | -11.3 | 6.7 | 0.78 |
| Feb | -6.7 | -10.4 | 3.7 | 0.84 |
| Mar | 4.6 | -15.9 | 20.5 | 0.90 |
| Apr | -4.9 | -12.8 | 7.9 | 0.81 |
| May | -1.8 | -1.5 | -0.3 | 0.84 |
| Jun | 5.2 | -1.5 | 6.7 | 0.95 |
| Jul | 3.3 | -1.2 | 4.5 | 0.85 |
| Aug | 0.0 | 1.2 | -1.2 | 0.77 |
| Sep | -0.3 | 2.1 | -2.4 | 0.72 |
| Oct | 6.7 | 3.0 | 3.7 | 1.86 |
| Nov | 2.4 | 2.4 | 0.0 | 1.00 |
| Dec | 0.3 | -7.9 | 8.2 | 0.99 |
Nearby years (cm vs. average)
-4.2
-1.7
-5.5
-7.2
-6.8
-2.0
-1.8
-0.4
-6.9
-3.0
+1.4
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 34 of 60 years (-2.0 cm vs. the period average).