Weather in Mariehamn in september
Climate normals based on 10 years of historical data for Mariehamn, Åland.
Average high
14°C
Average low
13°C
Rainfall
51 mm
10 rainy days
Sunshine
3.5h/day
Luftfuktighet
78%
How Hot Is Mariehamn in september?
Mariehamn in September clocks an average daytime peak of 14°C with overnight lows around 13°C. That's about 3°C warmer than August and similar to what Mariehamn sees in October.
Sunshine Hours in september
September sees about 3.5h of sunshine in Mariehamn — neither very bright nor very grey.
Does It Rain In Mariehamn In september?
Expect spells of rain in Mariehamn: 51mm total, with 10 wet days in September.
Is Mariehamn Humid In september?
Expect heavy, oppressive air in Mariehamn — humidity peaks at 78% on average.
Wind In Mariehamn In september
Sea breeze or thermal winds keep Mariehamn moving at 29 kph in September.
Cloud Cover In Mariehamn In september
Cloudy skies dominate Mariehamn in September — averaging 64% cloud cover.
Cities With Similar Weather In september
Weather in Mariehamn, month by month
| Month | High / Low | Regn | |
|---|---|---|---|
| Vær i januar | 2°C / -1°C | 57mm | Details → |
| Vær i februar | 1°C / -1°C | 40mm | Details → |
| Vær i mars | 2°C / 0°C | 37mm | Details → |
| Vær i april | 5°C / 2°C | 29mm | Details → |
| Vær i mai | 9°C / 6°C | 36mm | Details → |
| Vær i juni | 15°C / 12°C | 34mm | Details → |
| Vær i juli | 18°C / 15°C | 54mm | Details → |
| Vær i august | 18°C / 16°C | 59mm | Details → |
| Vær i september | 14°C / 13°C | 51mm | |
| Vær i oktober | 10°C / 8°C | 69mm | Details → |
| Vær i november | 6°C / 4°C | 61mm | Details → |
| Vær i desember | 4°C / 1°C | 56mm | Details → |