Helsinki Weather in October
In October, Helsinki averages a high of 9°C (48°F) and a low of 4°C (40°F), from 55 years of daily records (1971–2026).
9°C
Average high
48°F
4°C
Average low
40°F
18°C
Record high
64°F · October 5, 2005
-12°C
Record low
11°F · October 31, 1992
What October Is Like in Helsinki
- 5 of the 10 warmest Octobers on record in Helsinki have come since 2011.
- October in Helsinki has become 1.5°C (2.6°F) warmer on average: the 2011–2025 average against 1970–1989.
- The coldest October reading, -12°C (11°F) on October 31, 1992, has not been matched in 34 years.
- On average, 5 nights in October drop below freezing.
At least 1 mm of rain falls on 33% of October days, and the month averages 73 mm in total.
Warmest: 2024 (11.7°C)Latest: 2025 (10.4°C)10-year averageLong-run average (9.0°C)
Look Up a Day in October
See the weather in Helsinki on any October date, year by year.
Source: NOAA GHCN-Daily, Helsinki Kaisaniemi Aws (1971–2026); Helsinki Rautatientori (2009–2015). Averages cover 1971–2026. How we compute this