Weather in Oslo in August 2025
Average weather
Average temperature in Oslo in August
The temperature in August is +68°F on average, with a range between a maximum of +73°F during the day and a minimum of +50°F at night.
The average maximum temperature goes down 8% by the end of the month, compared with the beginning of the month, from +70°F to +68°F.
Is Oslo warm or cold in August?
Oslo is typically mild in August.
Maximum temperatures go down compared to the previous month from +72°F to +70°F. The minimum temperature also goes down from +55°F to +54°F.
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 Oslo, here is the comparison with other months:
Water temperature in Oslo in August
Water in Oslo in August is Fresh. It varies from +60°F to +69°F, with an average of +64°F. This is almost similar to the air temperature, which averages +70°F.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Oslo in August?
Climate in Oslo in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +72°F | +70°F | +61°F | ||||
| Min. temperature | ||||||
| +45°F | +41°F | +30°F | ||||
| Max. temperature | ||||||
| +93°F | +91°F | +79°F | ||||
| Rainfall | ||||||
| 100 mm | 108 mm | 94 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Avg. water temperature | ||||||
| +63°F | +64°F | +60°F | ||||
| Humidity | ||||||
| 68% | 72% | 75% | ||||
| Air pressure | ||||||
| 1009 HPa | 1010 HPa | 1011 HPa | ||||
| Sunny days | ||||||
| 3 | 2 | 3 | ||||
| Cloudy days | ||||||
| 11 | 11 | 11 | ||||
| Rainy days | ||||||
| 17 | 18 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August weather is still as good as in July. It’s getting colder in August. From +72°F in the day, the average maximum temperature lowers to +70°F. Prepare for more rain. Average rainfall goes from 100 mm to 108 mm. Humidity rises from 68% to 72%. The average wind speed doesn’t change much during August, staying around 2 m/s. The days becoming less sunny, going from 3 sunny days in July to 2 in August.
Next month (September) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Oslo is gradually increasing during August, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last August in Oslo?
Climate Change Over the Years
The climate in Oslo in August has not changed that much over the last 43 years.
The average temperature was the lowest in 1985 (+46°F) and the highest in 2020 (+54°F). The driest year was 1981 with only 527 mm of rainfall, and the wettest year was 2020 with 2467 mm.
FAQ
Is August a good time to visit Oslo?
Can you sunbathe in Oslo in August?
Can you swim in Oslo in August?
Is Oslo rainy in August?
Is it sunny in Oslo in August?
Other cities in Norway
Monthly weather in Oslo
Source of the data
For this page, we’ve looked at the typical weather in Oslo, 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.