NorwayAverage weather for Oslo in September
It's cool to moderate in September in Oslo with an average temperature of 16°C. Temperatures this month range from a low of 12°C to a high of 18°C. At night, you can expect temperatures between 6°C and 9°C.
Start of September
The month of September starts in Oslo with mild temps, averaging around 18°C during the day and nights around 9°C. You can expect regular precipitation, but there will also be some sunny days in the early part of the month.
Mid September
By mid-September, daytime temps drop to around 16°C, with nights around 8°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of September
By the end of September, the average daytime temperature in Oslo is around 14°C, while nighttime temps are about 7°C. There’s a significant chance of many days with precipitation.
Water temperature
The water temperature at Oslo is 19°C this month. Refreshing if you feel like a swim.
In September, there is an average of 140 mm of precipitation, spread over 12 days. The wind speed is around 4 Bft, mostly coming from the South.
Oslo in September |
New York | ||
|---|---|---|---|
 Average temperature |
16°C | 27°C | |
 Max. temperature |
18°C | 31°C | |
| Min. temperature |
12°C | -5°C | |
 Total precipitation |
140 mm | 57 mm | |
| Rainy days |
12 days | 9 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Oslo?
Looking for sun and warm weather? September isn’t a good month to be in Oslo. The temperatures are too low for a warm stay this month.
Temperature records
With 26°C in 2021, Oslo reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 6°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of -3°C to a highest value of 17°C.
Check out the climate of Oslo for all months and discover the best travel time
Curious about the weather in other parts of Norway? Check out the climate and weather for spots like Lofoten, Vesterålen, Bergen, or explore other destinations in Norway.
Daily Temperature in September in Oslo
This chart shows the average daily high and low temperatures in September for Oslo, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Oslo
The chart below shows the average daily precipitation in September for Oslo, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 12 days of precipitation in Oslo.
Daily UV index in September in Oslo
This chart shows the average daily UV index in September in Oslo, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Oslo over the years
This chart shows the average temperature in September in Oslo, measured in degrees Celsius, over the past few years.
Total precipitation in September in Oslo over the years
This chart shows the average precipitation in September in Oslo, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Oslo
Click on any day in September to get detailed info about the usual weather on that day in Oslo. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Oslo
Have you been to Oslo in September?
Share your weather experience in September in Oslo.
Average weather in Oslo by month
Click on a month below to see detailed weather info for Oslo. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
