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Duck Pier water levels in 1991
Annual rank30 / 46
vs. average-2.3 cm
Highest monthly peak1.34 mOctober 1991
Monthly mean vs. previous year
| Month | 1991 (cm) | 1990 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 0.7 | -21.3 | 22.0 | 0.88 |
| Feb | -7.2 | -15.5 | 8.3 | 0.85 |
| Mar | 4.9 | -13.6 | 18.5 | 0.90 |
| Apr | -1.5 | -12.4 | 10.9 | 1.05 |
| May | -2.7 | -2.4 | -0.3 | 0.94 |
| Jun | 6.8 | -5.4 | 12.2 | 1.11 |
| Jul | 4.9 | -3.9 | 8.8 | 0.90 |
| Aug | 1.9 | 4.6 | -2.7 | 0.83 |
| Sep | 5.6 | 8.0 | -2.4 | 0.98 |
| Oct | 13.8 | 3.1 | 10.7 | 1.34 |
| Nov | 6.8 | -0.5 | 7.3 | 1.25 |
| Dec | -9.4 | -9.4 | 0.0 | 0.99 |
Nearby years (cm vs. average)
-7.7
-2.4
-12.3
-8.8
-10.1
-2.3
-3.5
-2.0
-8.6
-5.6
-1.8
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 1991 annual mean water level ranked 30 of 46 years (-2.3 cm vs. the period average).