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Baltimore, Fort McHenry water levels in 2021
Annual rank5 / 123
vs. average21.2 cm
Highest monthly peak1.24 mOctober 2021
Monthly mean vs. previous year
| Month | 2021 (cm) | 2020 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | 4.7 | 2.5 | 2.2 | 0.57 |
| Feb | 3.6 | 4.0 | -0.4 | 0.58 |
| Mar | 1.3 | 12.1 | -10.8 | 0.60 |
| Apr | 9.3 | 17.3 | -8.0 | 0.70 |
| May | 6.0 | 13.9 | -7.9 | 0.58 |
| Jun | 19.1 | 21.7 | -2.6 | 0.70 |
| Jul | 18.4 | 23.4 | -5.0 | 0.74 |
| Aug | 23.1 | 22.9 | 0.2 | 0.73 |
| Sep | 26.8 | 25.4 | 1.4 | 0.95 |
| Oct | 30.5 | 18.9 | 11.6 | 1.24 |
| Nov | 9.3 | 8.8 | 0.5 | 0.68 |
| Dec | 4.4 | 5.7 | -1.3 | 0.63 |
Nearby years (cm vs. average)
+16.9
+19.0
+20.7
+24.2
+22.8
+21.2
+19.5
+27.0
+30.0
+20.6
Monthly means are relative to the station's mean sea level (MSL) datum.
About this page
The 2021 annual mean water level ranked 5 of 123 years (21.2 cm vs. the period average).