Copenhagen Weather in September
In September, Copenhagen averages a high of 18°C (64°F) and a low of 11°C (52°F), from 55 years of daily records (1971–2026).
18°C
Average high
64°F
11°C
Average low
52°F
29°C
Record high
85°F · September 4, 2024
2°C
Record low
36°F · September 24, 2025
What September Is Like in Copenhagen
- Copenhagen's hottest September day on record is a recent one: 29°C (85°F) on September 4, 2024.
- Copenhagen set its coldest September reading on record recently: 2°C (36°F) on September 24, 2025.
- 5 of the 10 warmest Septembers on record in Copenhagen have come since 2011.
- September in Copenhagen has become 1.5°C (2.7°F) warmer on average: the 2011–2025 average against 1970–1989.
At least 1 mm of rain falls on 30% of September days, and the month averages 60 mm in total.
Warmest: 2023 (21.9°C)Latest: 2025 (20.0°C)10-year averageLong-run average (17.8°C)
Look Up a Day in September
See the weather in Copenhagen on any September date, year by year.
Source: NOAA GHCN-Daily, Koebenhavn: Landbohojskolen-1 (1971–2000); Malmo A (1997–2026). Averages cover 1971–2026. How we compute this