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Sundsvall Monthly Climate Averages
Sundsvall is located in subarctic climate zone that typically has substantial seasonal variance in temperatures short summer and prolonged and sometimes very cold winter.
To help you choose the best time to travel, you can find climate data below on the weather in Sundsvall .
Month | t°C day |
t°C night |
mm rain |
daylight |
January | -2.5 | -10.6 | 38 | 7.2h |
February | -1.4 | -10.2 | 28 | 9.7h |
March | +3.2 | -6.3 | 30 | 12.6h |
April | +8.5 | -1.5 | 32 | 15.9h |
May | +13.9 | +3.3 | 35 | 19.7h |
June | +18.3 | +7.4 | 41 | 22.3h |
July | +21.5 | +11.8 | 58 | 20.4h |
August | +20 | +10.8 | 64 | 16.9h |
September | +15.4 | +6 | 64 | 13.7h |
October | +8.2 | +0.4 | 52 | 10.6h |
November | +2.5 | -3.4 | 53 | 7.8h |
December | -0.8 | -8.1 | 46 | 6.2h |
Best time with the soft weather for the sightseeing and long walks in Sundsvall are June, July, August.
Temperature in Sundsvall
The table shows that the hottest months in Sundsvall are July and August, during which the average daytime temperature reaches +21.5°C and the nighttime temperature falls to +11.8°C.
The coldest months are January and February, when the daily average temperature falls to -2.5°C, and drops to -10.6°C during the night.
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Sea temperature
The month with the highest average monthly temperature in the Gulf of Bothnia on the beaches of Sundsvall is August with 17 degrees.
The coldest water can be found in February — 0.2degrees C.
Precipitation
The largest amount of precipitation falls on average in September and August, up to 64mm, and the least in February and March — up to 28mm.