Historical Weather in Oslo, Norway
See 55+ years of weather history for any date in Oslo going back to 1970.
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Monthly Climate Averages
Historical temperature and precipitation averages for Oslo, Norway, based on 55+ years of weather data.
Temperatures shown in Celsius with Fahrenheit in parentheses. Rainfall in millimetres, snowfall in centimetres.
Oslo Weather by Month
The January heat record, 13°C (55°F) on January 5, 1973, has stood for 53 years.
February in Oslo has become 2.5°C (4.6°F) warmer on average: the 2012–2026 average against 1970–1989.
March in Oslo has become 2.6°C (4.7°F) warmer on average: the 2012–2026 average against 1970–1989.
April in Oslo has become 1.9°C (3.5°F) warmer on average: the 2012–2026 average against 1970–1989.
The coldest May reading, -3°C (27°F) on May 1, 1971, has not been matched in 55 years.
6 of the 10 warmest Junes on record in Oslo have come since 2012.
The coldest July reading, 5°C (41°F) on July 2, 1979, has not been matched in 47 years.
The August heat record, 34°C (94°F) on August 3, 1982, has stood for 44 years.
Oslo's hottest September day on record is a recent one: 27°C (81°F) on September 6, 2024.
The October heat record, 19°C (67°F) on October 2, 1973, has stood for 53 years.
November in Oslo has become 1.8°C (3.3°F) warmer on average: the 2011–2025 average against 1970–1989.
December 2025 was the 2nd warmest December in 55 years of records, 4.2°C (7.6°F) above the long-run average.
Source: NOAA GHCN-Daily, Oslo Blindern (1971–2026). Records through 2026.