Climate averages 1991–2020
Mariehamn weather
in March.
A cold month with light precipitation: the 10th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a cold month in Mariehamn: daytime highs average 1.5°C and nights cool to about -1.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 27 mm of precipitation on roughly 7 days, which makes March a month with light precipitation (the driest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 45 min on an average March day.
The nearest other city in this atlas is Uppsala (130 km away). In March its highs average 3.9°C, 2.5°C warmer than Mariehamn, with 29 mm of rain.
From March to April, average highs rise by 3.7°C to 5.2°C, and monthly precipitation rises from 27 mm to 29 mm.
The annual picture
March in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Mariehamn climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.0°C-1.6°C | -1.6°C | 43 | 10.5 | 6.87 h |
| February | -0.2°C-2.9°C | -2.9°C | 29 | 7.8 | 9.19 h |
| March, selected | 1.5°C-1.5°C | -1.5°C | 27 | 7.1 | 11.712 h |
| April | 5.2°C1.8°C | 1.8°C | 29 | 6.9 | 14.515 h |
| May | 9.7°C6.1°C | 6.1°C | 33 | 6.6 | 17.117 h |
| June | 14.5°C10.9°C | 10.9°C | 49 | 7.5 | 18.719 h |
| July | 18.4°C15.1°C | 15.1°C | 48 | 7.6 | 18.018 h |
| August | 18.3°C15.4°C | 15.4°C | 55 | 10.2 | 15.716 h |
| September | 14.3°C11.8°C | 11.8°C | 54 | 9.2 | 13.013 h |
| October | 9.1°C7.0°C | 7.0°C | 62 | 11.8 | 10.210 h |
| November | 5.3°C3.2°C | 3.2°C | 60 | 13.0 | 7.68 h |
| December | 2.8°C0.4°C | 0.4°C | 56 | 13.0 | 6.06 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
March in nearby cities
- Uppsala in MarchSweden · 130 kmHigh 3.9°C · Low -3.1°C · 29 mm rain
- Sollentuna in MarchSweden · 134 kmHigh 3.8°C · Low -2.4°C · 29 mm rain
- Turku in MarchFinland · 135 kmHigh 1.7°C · Low -4.7°C · 35 mm precipitation
- Stockholm in MarchSweden · 135 kmHigh 3.7°C · Low -1.8°C · 30 mm rain
- Haninge in MarchSweden · 144 kmHigh 3.3°C · Low -1.8°C · 30 mm rain
- Huddinge in MarchSweden · 146 kmHigh 3.7°C · Low -1.8°C · 30 mm rain
- Södertälje in MarchSweden · 164 kmHigh 4.2°C · Low -2.4°C · 30 mm rain
- Gävle in MarchSweden · 166 kmHigh 3.5°C · Low -3.3°C · 28 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Mariehamn) is explained once on the Mariehamn year overview and on the Sources, method and limits page.