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Charleston (Customhouse Wharf) water levels in 1991
Annual rank23 / 107
vs. average8.9 cm
Highest monthly peak1.44 mJuly 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 1.7 | -24.6 | 26.3 | – |
| Feb | -13.9 | -17.5 | 3.6 | – |
| Mar | -3.8 | -4.1 | 0.3 | 1.13 |
| Apr | -4.7 | -9.6 | 4.9 | 1.14 |
| May | 5.3 | -6.3 | 11.6 | 1.27 |
| Jun | 10.2 | -0.2 | 10.4 | 1.22 |
| Jul | 2.9 | -3.2 | 6.1 | 1.44 |
| Aug | 5.3 | 2.6 | 2.7 | 1.27 |
| Sep | 18.4 | 11.7 | 6.7 | 1.28 |
| Oct | 19.0 | 11.1 | 7.9 | 1.26 |
| Nov | 7.4 | 5.0 | 2.4 | 1.34 |
| Dec | -14.5 | -4.7 | -9.8 | 1.13 |
Nearby years (cm vs. average)
+5.5
+3.5
+0.0
+0.5
+2.8
+8.9
+7.8
+7.2
+6.1
+11.3
+2.9
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 23 of 107 years (8.9 cm vs. the period average).