Climate averages 1991–2020
Mariehamn weather
in July.
A mild, moderately wet month: the warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Mariehamn: daytime highs average 18.4°C and nights cool to about 15.1°C. By daytime temperature it is the warmest month of the year.
Expect about 48 mm of rain on roughly 8 days, which makes July a moderately wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 18 h 02 min on an average July day.
The nearest other city in this atlas is Uppsala (130 km away). In July its highs average 21.7°C, 3.4°C warmer than Mariehamn, with 70 mm of rain.
From July to August, average highs fall by 0.1°C to 18.3°C, and monthly rainfall rises from 48 mm to 55 mm.
The annual picture
July 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, selected | 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
July in nearby cities
- Uppsala in JulySweden · 130 kmHigh 21.7°C · Low 13.7°C · 70 mm rain
- Sollentuna in JulySweden · 134 kmHigh 21.5°C · Low 14.3°C · 70 mm rain
- Turku in JulyFinland · 135 kmHigh 21.4°C · Low 13.6°C · 85 mm rain
- Stockholm in JulySweden · 135 kmHigh 20.9°C · Low 14.6°C · 65 mm rain
- Haninge in JulySweden · 144 kmHigh 20.3°C · Low 14.4°C · 61 mm rain
- Huddinge in JulySweden · 146 kmHigh 20.9°C · Low 14.6°C · 65 mm rain
- Södertälje in JulySweden · 164 kmHigh 22.0°C · Low 14.2°C · 71 mm rain
- Gävle in JulySweden · 166 kmHigh 21.8°C · Low 13.8°C · 68 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.