Weather in Oulu in August 2025
Average weather
Average temperature in Oulu in August
The expected average maximum temperature in August is +21°C with a maximum of +29°C and a minimum of +8°C.
The average maximum temperature goes down 24% by the end of the month, compared with the beginning of the month, from +22°C to +17°C.
Is Oulu warm or cold in August?
Oulu is typically mild in August.
Maximum temperatures go down compared to the previous month from +19°C to +17°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 Oulu, here is the comparison with other months:
Water temperature in Oulu in August
Water in Oulu in August is Fresh. It varies from +14°C to +18°C, with an average of +16°C. This is almost similar to the air temperature, which averages +17°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Oulu in August?
Climate in Oulu in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +19°C | +17°C | +12°C | ||||
| Min. temperature | ||||||
| +6°C | +2°C | -3°C | ||||
| Max. temperature | ||||||
| +32°C | +29°C | +24°C | ||||
| Rainfall | ||||||
| 76 mm | 77 mm | 59 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +17°C | +16°C | +13°C | ||||
| Humidity | ||||||
| 75% | 78% | 82% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 6 | 4 | 3 | ||||
| Cloudy days | ||||||
| 8 | 9 | 10 | ||||
| Rainy days | ||||||
| 16 | 17 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as ok as in July. It’s getting colder in August. From +19°C in the day, the average maximum temperature lowers to +17°C. Prepare for more rain. Average rainfall goes from 76 mm to 77 mm. Humidity rises from 75% to 78%. The average wind speed doesn’t change much during August, staying around 3 m/s. The days becoming less sunny, going from 6 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 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Oulu is gradually increasing during August, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last August in Oulu?
Climate Change over Years
The climate in Oulu in August has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+3°C) and the highest in 2020 (+8°C). The driest year was 2002 with only 247 mm of rainfall, and the wettest year was 2021 with 603 mm.
FAQ
Is August a good time to visit Oulu?
Can you sunbathe in Oulu in August?
Can you swim in Oulu in August?
Is Oulu rainy in August?
Is it sunny in Oulu in August?
Other cities in Finland
Monthly weather in Oulu
Source of the data
For this page, we’ve looked at the typical weather in Oulu, 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.