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Baltimore, Fort McHenry water levels in 2025
Annual rank8 / 123
vs. average20.6 cm
Highest monthly peak1.11 mOctober 2025
Monthly mean vs. previous year
| Month | 2025 (cm) | 2024 (cm) | Diff | Peak (m) |
|---|---|---|---|---|
| Jan | -14.8 | 16.4 | -31.2 | 0.42 |
| Feb | -4.7 | 25.7 | -30.4 | 0.46 |
| Mar | 7.7 | 16.6 | -8.9 | 0.62 |
| Apr | 8.3 | 30.5 | -22.2 | 0.60 |
| May | 20.1 | 34.7 | -14.6 | 0.77 |
| Jun | 22.0 | 22.3 | -0.3 | 0.66 |
| Jul | 23.9 | 21.7 | 2.2 | 0.67 |
| Aug | 30.9 | 24.7 | 6.2 | 0.94 |
| Sep | 30.8 | 38.1 | -7.3 | 0.74 |
| Oct | 29.4 | 20.9 | 8.5 | 1.11 |
| Nov | -1.5 | 12.1 | -13.6 | 0.53 |
| Dec | -2.5 | -1.0 | -1.5 | 0.57 |
Nearby years (cm vs. average)
+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 2025 annual mean water level ranked 8 of 123 years (20.6 cm vs. the period average).