Climate averages 1991–2020
Mariehamn weather
in October.
A cool, moderately wet month: the 6th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Mariehamn: daytime highs average 9.1°C and nights cool to about 7.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 62 mm of rain on roughly 12 days, which makes October a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 12 min on an average October day.
The nearest other city in this atlas is Uppsala (130 km away). In October its highs average 9.0°C, about as warm as Mariehamn, with 48 mm of rain.
From October to November, average highs fall by 3.8°C to 5.3°C, and monthly rainfall falls from 62 mm to 60 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Uppsala in OctoberSweden · 130 kmHigh 9.0°C · Low 4.2°C · 48 mm rain
- Sollentuna in OctoberSweden · 134 kmHigh 9.3°C · Low 5.0°C · 48 mm rain
- Turku in OctoberFinland · 135 kmHigh 8.3°C · Low 3.7°C · 59 mm rain
- Stockholm in OctoberSweden · 135 kmHigh 9.4°C · Low 5.6°C · 48 mm rain
- Haninge in OctoberSweden · 144 kmHigh 9.2°C · Low 5.6°C · 54 mm rain
- Huddinge in OctoberSweden · 146 kmHigh 9.4°C · Low 5.6°C · 48 mm rain
- Södertälje in OctoberSweden · 164 kmHigh 9.5°C · Low 4.9°C · 49 mm rain
- Gävle in OctoberSweden · 166 kmHigh 8.7°C · Low 4.2°C · 55 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.