Oslo: Weather Guide & Climate
Complete month-by-month weather guide: Oslo. Best time to visit: May, June, July, August, September. Plan your trip with detailed climate data.
Climate Overview
Oslo has a cool climate with average yearly highs of 12°C, lows of 5°C, and approximately 13 rainy days per month.
The best time to visit Oslo is during May, June, July, August, September, when weather is pleasant and ideal for outdoor activities
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Air Quality
Best Time
May, Jun, Jul, Aug, Sep
Hottest
Coldest
Driest Month
Forecast for your trip dates
Up to 16 days ahead| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 4°C | 0°C | 12 | Good |
| February | 5°C | -1°C | 10 | Good |
| March | 6°C | -1°C | 8 | Good |
| April | 12°C | 2°C | 6 | Good |
| May | 15°C | 5°C | 7 | Excellent (best) |
| June | 23°C | 14°C | 12 | Excellent (best) |
| July | 18°C | 12°C | 16 | Excellent (best) |
| August | 21°C | 13°C | 9 | Excellent (best) |
| September | 17°C | 9°C | 12 | Excellent (best) |
| October | 11°C | 7°C | 21 | Wet |
| November | 7°C | 3°C | 14 | Wet |
| December | 3°C | 1°C | 26 | Wet |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
Weather by Season
Winter
Dec–Feb
High: 4°C
Low: 0°C
Rainy days: 16 days/month
Spring
Mar–May
High: 11°C
Low: 2°C
Rainy days: 7 days/month
Summer
Jun–Aug
High: 21°C
Low: 13°C
Rainy days: 12 days/month
Autumn
Sep–Nov
High: 12°C
Low: 6°C
Rainy days: 16 days/month
Month-by-Month Weather Table
January
February
March
April
May
BestJune
BestJuly
BestAugust
BestSeptember
BestOctober
November
December
| Month | High | Low | Rainy days | Condition | View Details |
|---|---|---|---|---|---|
| January | 4°C | 0°C | 12 | Good | View Details → |
| February | 5°C | -1°C | 10 | Good | View Details → |
| March | 6°C | -1°C | 8 | Good | View Details → |
| April | 12°C | 2°C | 6 | Good | View Details → |
| May (best) | 15°C | 5°C | 7 | Excellent | View Details → |
| June (best) | 23°C | 14°C | 12 | Excellent | View Details → |
| July (best) | 18°C | 12°C | 16 | Excellent | View Details → |
| August (best) | 21°C | 13°C | 9 | Excellent | View Details → |
| September (best) | 17°C | 9°C | 12 | Excellent | View Details → |
| October | 11°C | 7°C | 21 | Wet | View Details → |
| November | 7°C | 3°C | 14 | Wet | View Details → |
| December | 3°C | 1°C | 26 | Wet | View Details → |
Oslo
Viking heritage with Vigeland Sculpture Park and Fram polar ship museum, opera house, sculpture park, and fjord access.
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Common Questions
What type of climate does Oslo have?
Oslo has a Cool climate with average yearly temperatures of 12°C (highs) and 5°C (lows).
When is the best time to visit Oslo?
The best time to visit Oslo is during May, June, July, August, September, when temperatures average around 15°C and conditions are ideal for sightseeing.
What are the hottest and coldest months in Oslo?
The hottest month in Oslo is June with average highs of 23°C, while the coldest is February with average lows of -1°C.
When is the rainy season in Oslo?
Oslo sees the most rain in December (26 rainy days), while April is the driest month (6 rainy days).
More Oslo Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for Oslo: top things to do, itineraries, and typical costs.