Oslo Weather in August
August in Oslo averages 21°C (70°F) during the day and 11°C (52°F) at night. It is the wettest month of the year, with 112 mm (4.4 in) of rainfall on average, so waterproof gear is a must.
Rainfall in Oslo in August
With the most rainfall occurring this month, it's practical to keep an umbrella handy for sudden downpours. Based on our climate data of the past 30 years, about 16 days of rain are anticipated, with 112 mm (4.4 in) on average. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Oslo in August
Daytime temperatures in Oslo reach 21°C (70°F) in August, dropping to 11°C (52°F) at night. August is in the summer season. Conditions are often most pleasant around the middle of the day. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Oslo in August
Expect a lot of sunshine this month, with about 209 hours of sun. These sunny conditions add to the overall experience.
Wind Speed in Oslo in August
Average wind conditions reach 2 m/s (4 knots) in August. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.
Average water temperature in August
The water temperature is 16°C (61°F), chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Norway, check out our Oslo's climate page.
Oslo Temperature in August
Min Temperature
11°C (52°F)
Max Temperature
21°C (70°F)
Water Temperature
16°C (61°F)
Chance of Rain
55%
Precipitation
112 mm (4.4 in)
Rainy days
16 days
Humidity
70%
Windspeed
2 m/s (4 knots)
Sunshine
209 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Oslo typically drop from around 21°C (70°F) at the start of August to approximately 18°C (64°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Oslo in August
Browse day-by-day weather records for Oslo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Oslo historical weather extremes in August
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Oslo.
- On August 3, 1982, temperatures climbed to 32°C (90°F), marking the warmest August day on record.
- Oslo experienced its chilliest August day on August 28, 1986, reaching only 8°C (46°F).
- The coldest night in August in Oslo was on August 30, 1980, with a minimum of 1°C (34°F).
- The wettest August day on record brought 52 mm (2 in) of precipitation to Oslo (August 31, 2004).
Best Places in Norway in August
Find out more about the weather in Norway and which places have the best travel conditions in this month. See all of Norway in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Oslo in August
Comfortable temperatures call for an easy wardrobe in August. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 16°C (61°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Oslo in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Norway, check out our Oslo's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Oslo climate overview or explore weather in Norway.
