Weather World
Mariehamn Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 34°F Lo 30°F | Hi 33°F Lo 29°F | Hi 35°F Lo 31°F | Hi 40°F Lo 36°F | Hi 48°F Lo 44°F | Hi 57°F Lo 53°F | Hi 64°F Lo 60°F | Hi 64°F Lo 61°F | Hi 58°F Lo 55°F | Hi 50°F Lo 46°F | Hi 44°F Lo 40°F | Hi 38°F Lo 34°F |
| 17 mph | 15 mph | 15 mph | 13 mph | 12 mph | 12 mph | 12 mph | 13 mph | 14 mph | 16 mph | 16 mph | 17 mph |
| 1.7 in | 1.1 in | 1.1 in | 1.1 in | 1.5 in | 1.8 in | 2.3 in | 2.5 in | 2 in | 2 in | 1.9 in | 1.9 in |
| 82% | 84% | 83% | 81% | 81% | 81% | 80% | 79% | 79% | 79% | 81% | 81% |
| 71% | 65% | 56% | 48% | 39% | 36% | 38% | 40% | 44% | 57% | 66% | 71% |
| 29.8 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 29.9 in | 29.8 in | 29.9 in | 29.9 in | 29.9 in | 29.8 in | 29.8 in |
| 19 | 17 | 22 | 25 | 27 | 25 | 26 | 24 | 25 | 25 | 23 | 20 |
| 8 | 7 | 6 | 4 | 4 | 5 | 5 | 7 | 5 | 5 | 6 | 8 |
| 5 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
| 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 2 | 3 | 4 | 4 | 4 | 3 | 2 | 1 | 1 |
| 79 | 88 | 130 | 160 | 199 | 199 | 198 | 199 | 169 | 118 | 88 | 78 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 1°C Lo -1°C | Hi 0°C Lo -2°C | Hi 2°C Lo -0°C | Hi 4°C Lo 2°C | Hi 9°C Lo 7°C | Hi 14°C Lo 12°C | Hi 18°C Lo 16°C | Hi 18°C Lo 16°C | Hi 15°C Lo 13°C | Hi 10°C Lo 8°C | Hi 7°C Lo 5°C | Hi 3°C Lo 1°C |
| 27 km/h | 24 km/h | 24 km/h | 21 km/h | 20 km/h | 19 km/h | 19 km/h | 21 km/h | 23 km/h | 26 km/h | 26 km/h | 27 km/h |
| 44 mm | 29 mm | 28 mm | 27 mm | 38 mm | 45 mm | 58 mm | 64 mm | 51 mm | 52 mm | 48 mm | 49 mm |
| 82% | 84% | 83% | 81% | 81% | 81% | 80% | 79% | 79% | 79% | 81% | 81% |
| 71% | 65% | 56% | 48% | 39% | 36% | 38% | 40% | 44% | 57% | 66% | 71% |
| 1010 mb | 1012 mb | 1012 mb | 1014 mb | 1015 mb | 1013 mb | 1011 mb | 1012 mb | 1014 mb | 1013 mb | 1011 mb | 1009 mb |
| 19 | 17 | 22 | 25 | 27 | 25 | 26 | 24 | 25 | 25 | 23 | 20 |
| 8 | 7 | 6 | 4 | 4 | 5 | 5 | 7 | 5 | 5 | 6 | 8 |
| 5 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
| 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 2 | 3 | 4 | 4 | 4 | 3 | 2 | 1 | 1 |
| 79 | 88 | 130 | 160 | 199 | 199 | 198 | 199 | 169 | 118 | 88 | 78 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.