Uusimaa, Finland · population 558,457 · 168 weather stations within 200 km · records 1750 to 2025
Helsinki has an average annual daytime high of 7.7°C, based on the 1951 to 1980 baseline. Its warmest month is July, when highs typically reach 19.8°C, and its coldest is February, with overnight lows near -8.8°C.
These figures reflect annual averages, not single-day records. Daily observations are outside this dataset's precision.
Since 1900, Helsinki's average temperature has risen by +2.9°C. Compared to the earliest station records that begin in 1750, warming totals +2.7°C.
20-year smoothed annual temperature reconstructed from station anomalies. Dashed line: 1951–1980 baseline.
Daytime highs sit within a comfortable 15°C to 26°C range.
Helsinki's average annual daytime high is 7.7°C, based on the 1951 to 1980 baseline period. The warmest month is July, with highs averaging 19.8°C, and the coldest is February, with lows averaging -8.8°C.
July is the warmest month in Helsinki, with typical daytime highs of 19.8°C.
2024 is the hottest year on record for Helsinki, running +2.9°C above the 1951 to 1980 baseline.
Yes. Since 1900, Helsinki has warmed by roughly +2.9°C.
June to August typically offers the most comfortable daytime highs, in the 15°C to 26°C range.
Baseline period 1951 to 1980. Monthly averages are the mean of station observations weighted by proximity. Warming trend is the 20-year smoothed anomaly against that baseline.