Climate in Oslo

Oslo, Norway has a oceanic climate. The annual average temperature is about 3.9°C and the city receives roughly 1001 mm of precipitation across 167 rainy days a year, with around 880 hours of sunshine. The warmest month is Jul (highs near 13.6°C) and the coldest is Jan (lows near -5.7°C). These are deterministic, latitude- and region-based planning estimates — not a forecast or measured station data; check current conditions with an official meteorological service before travel.

Data year 2025; last updated 2026-05-16.

Oslo is classified as Oceanic. This reflects its annual temperature range and the seasonal pattern of its rainfall.

Oslo receives about 1001 mm of precipitation a year over roughly 167 rainy days. The wettest month is Dec and the driest is Jun.

Oslo sees an estimated 880 hours of sunshine a year, concentrated in the warmer months around Jul.

By temperature and rainfall, the most comfortable months in Oslo are Jul, Jun, Aug. Conditions vary year to year — verify with a current forecast before booking.

Oslo has a climate comfort score of 48/100, a moderate year-round climate by this measure. The score weights mild temperatures most, then rainfall balance, sunshine, low seasonality, and the absence of extreme winter cold or summer heat.

• Climate in Stockholm — Subarctic, comfort 56/100
• Climate in Copenhagen — Oceanic, comfort 59/100
• Climate in Helsinki — Subarctic, comfort 48/100