Best months
June, July, and August
Warmest month
July, 23°C
Wettest month
August, 120 mm
Oslo weather by month
Average daily high and low, total rainfall and days with at least 2.5 mm of rain.
| Month | High / low | Rain | Verdict |
|---|---|---|---|
| January | 0°C / -5°C | 60 mm · 7 days | Cold |
| February | 1°C / -4°C | 55 mm · 7 days | Cold |
| March | 6°C / -2°C | 41 mm · 5 days | Cold |
| April | 12°C / 2°C | 46 mm · 5 days | Cold |
| May | 17°C / 7°C | 62 mm · 7 days | Fair |
| June | 22°C / 11°C | 85 mm · 8 days | Great |
| July | 23°C / 14°C | 102 mm · 9 days | Great |
| August | 21°C / 13°C | 120 mm · 10 days | Good |
| September | 17°C / 9°C | 86 mm · 7 days | Fair |
| October | 10°C / 4°C | 95 mm · 9 days | Cold |
| November | 5°C / 0°C | 79 mm · 8 days | Cold |
| December | 1°C / -3°C | 60 mm · 8 days | Cold |
Oslo by season
Spring
Spring (April-May) sees the city awakening from winter. Days lengthen rapidly, trees blossom, and outdoor cafes begin to fill up, though the weather can be unpredictable with occasional rain and cool temperatures.
- + Fewer tourists
- + Lower prices for accommodation
- + Beautiful blooming flowers in parks like Frogner
- − Fjord water is still very cold for swimming
- − Unpredictable weather (rain/sun mix)
Summer
Summer (June-August) is peak season, with long, bright days (up to 19 hours of daylight in June), pleasant temperatures averaging around 22°C, and a lively, festive atmosphere. This is the time for fjord swimming, hiking, and outdoor festivals.
- + Best weather for outdoor activities
- + Midnight sun-like evenings
- + All attractions, ferries, and tours are fully operational
- − Highest prices for flights and hotels
- − Largest crowds at major sights
Autumn
Autumn (September-October) brings stunning fall foliage, especially in the surrounding forests. The air turns crisp, cultural season kicks into high gear, and the summer crowds dissipate.
- + Beautiful autumn colors in Nordmarka
- + Cultural events and new museum exhibitions start
- + Moderate crowds and prices
- − Days get noticeably shorter
- − Weather becomes cooler and rainier
Winter
Winter (November-March) is cold, dark, and magical. Snow blankets the city, creating perfect conditions for cross-country skiing in the forests right from the metro. It's the season for cozy 'koselig' moments, Christmas markets, and seeing the city illuminated.
- + Winter sports accessible from the city
- + Charming Christmas markets (Nov-Dec)
- + Few tourists and a unique, cozy atmosphere
- − Very short daylight hours (as little as 6 hours)
- − Temperatures often below freezing, can be -2°C or colder
Oslo month by month
Oslo in January
ColdIn January, Oslo averages highs of 0°C and lows of -5°C, with about 7 rainy days and 60 mm of rain. It is cold, so pack warm layers.
Oslo in February
ColdIn February, Oslo averages highs of 1°C and lows of -4°C, with about 7 rainy days and 55 mm of rain. It is cold, so pack warm layers.
Oslo in March
ColdIn March, Oslo averages highs of 6°C and lows of -2°C, with about 5 rainy days and 41 mm of rain. It is cold, so pack warm layers.
Oslo in April
ColdIn April, Oslo averages highs of 12°C and lows of 2°C, with about 5 rainy days and 46 mm of rain. It is cold, so pack warm layers.
Oslo in May
FairIn May, Oslo averages highs of 17°C and lows of 7°C, with about 7 rainy days and 62 mm of rain. Expect mixed weather, with comfortable spells.
Oslo in June
GreatIn June, Oslo averages highs of 22°C and lows of 11°C, with about 8 rainy days and 85 mm of rain. It is one of the most comfortable months for sightseeing.
Oslo in July
GreatIn July, Oslo averages highs of 23°C and lows of 14°C, with about 9 rainy days and 102 mm of rain. It is one of the most comfortable months for sightseeing.
Oslo in August
GoodIn August, Oslo averages highs of 21°C and lows of 13°C, with about 10 rainy days and 120 mm of rain. It is a good month to visit.
Oslo in September
FairIn September, Oslo averages highs of 17°C and lows of 9°C, with about 7 rainy days and 86 mm of rain. Expect mixed weather, with comfortable spells.
Oslo in October
ColdIn October, Oslo averages highs of 10°C and lows of 4°C, with about 9 rainy days and 95 mm of rain. It is cold, so pack warm layers.
Oslo in November
ColdIn November, Oslo averages highs of 5°C and lows of 0°C, with about 8 rainy days and 79 mm of rain. It is cold, so pack warm layers.
Oslo in December
ColdIn December, Oslo averages highs of 1°C and lows of -3°C, with about 8 rainy days and 60 mm of rain. It is cold, so pack warm layers.
Top tours and experiences in Oslo
The tours and tickets travellers book most, with ratings and reviews from Viator.
Guided Sightseeing Cruise on Oslofjord by Premium Silent Boat
4.7870 reviews2h
from €57
Check availability
All things to do in Oslo →
Tours and prices from Viator, a Tripadvisor company. Prices change with your dates. We may earn a commission if you book, at no extra cost to you.
Plan your Oslo trip
Best time to visit Oslo: FAQ
What is the best month to visit Oslo?+
June is the most comfortable month on average, with highs of 22°C. July and August are close behind.
What is the rainiest month in Oslo?+
August is the wettest month, with about 120 mm of rain.
How hot does Oslo get?+
July is the warmest month, with average highs of 23°C and lows of 14°C. The coldest nights come in January, averaging -5°C.
Averages for 2006–2025 from the OSLO BLINDERN weather station (4 km from the centre), NOAA Global Historical Climatology Network. Verdicts rate sightseeing comfort from daytime highs and rainy days.