Weather in Sundsvall in August 2025
Average weather
Average temperature in Sundsvall in August
The expected average maximum temperature in August is +19°C with a maximum of +23°C and a minimum of +9°C.
The average maximum temperature goes up 7% by the end of the month, compared with the beginning of the month, from +17°C to +18°C.
Is Sundsvall warm or cold in August?
Sundsvall is typically mild in August.
Maximum temperatures go down compared to the previous month from +21°C to +19°C. The minimum temperature also goes down from +12°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Sundsvall, here is the comparison with other months:
Climate in Sundsvall in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +21°C | +19°C | +14°C | ||||
| Min. temperature | ||||||
| +5°C | +3°C | -2°C | ||||
| Max. temperature | ||||||
| +32°C | +30°C | +25°C | ||||
| Rainfall | ||||||
| 72 mm | 80 mm | 59 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 72% | 77% | 81% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 5 | 4 | 4 | ||||
| Cloudy days | ||||||
| 8 | 9 | 10 | ||||
| Rainy days | ||||||
| 17 | 17 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August typically has worse weather conditions compared to July. It’s getting colder in August. From +21°C in the day, the average maximum temperature lowers to +19°C. Prepare for more rain. Average rainfall goes from 72 mm to 80 mm. Humidity rises from 72% to 77%. The average wind speed doesn’t change much during August, staying around 2 m/s. The days becoming less sunny, going from 5 sunny days in July to 4 in August.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Sundsvall is gradually increasing during August, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Sundsvall?
Climate Change over Years
The climate in Sundsvall in August has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+6°C) and the highest in 2020 (+10°C). The driest year was 1997 with only 281 mm of rainfall, and the wettest year was 2000 with 645 mm.
FAQ
Is August a good time to visit Sundsvall?
Can you sunbathe in Sundsvall in August?
Is Sundsvall rainy in August?
Is it sunny in Sundsvall in August?
Other cities in Sweden
Monthly weather in Sundsvall
Source of the data
For this page, we’ve looked at the typical weather in Sundsvall, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.