Tallinn Weather in September
In September, Tallinn averages a high of 15°C (60°F) and a low of 8°C (46°F), from 54 years of daily records (1971–2026).
15°C
Average high
60°F
8°C
Average low
46°F
28°C
Record high
83°F · September 4, 2024
-5°C
Record low
24°F · September 24, 1973
What September Is Like in Tallinn
- Tallinn's hottest September day on record is a recent one: 28°C (83°F) on September 4, 2024.
- September in Tallinn has become 2.2°C (3.9°F) warmer on average: the 2011–2025 average against 1970–1989.
- 6 of the 10 warmest Septembers on record in Tallinn have come since 2011.
- September 2025 was the 3rd warmest September in 54 years of records, 3.1°C (5.5°F) above the long-run average.
At least 1 mm of rain falls on 36% of September days, and the month averages 70 mm in total.
Warmest: 2024 (20.1°C)Latest: 2025 (18.7°C)10-year averageLong-run average (15.4°C)
Look Up a Day in September
See the weather in Tallinn on any September date, year by year.
Source: NOAA GHCN-Daily, Tallinn (1971–2026). Averages cover 1971–2026. How we compute this