Weather in Sundsvall: August
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Average day temperature: | 65.4°F |
| Average night temperature: | 53.6°F | |
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Sea water temperature: | 62.1°F |
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Number of sunny days: | 10 days |
| Day length: | 14.5 - 17.4 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 1.9 in. | |
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forecast
| Sundsvall |
temperature
| Sundsvall |
Air temperature in August, °F
The highest day temperature during August of 2025 was 79°F. At the same time the lowest night temperature was 42°F. Daily and nightly averages during August were 63.3°F and 53.0°F.
Sea water temperature in Sundsvall in August, °F
The average sea water temperature in August of 2025 was 61.8°F. The highest and lowest sea temperatures during the month were 70.3°F and 55.2°F.
Mostly all days in August are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Sundsvall in August is 2.0 in. Other months of the year show relatively similar values.
The average wind speed value in August is 6.7 mph The wind's strength is relatively same during the whole year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 7.6.
Best time for vacation in Sundsvall
Sundsvall on a weather map
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