Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Trosa, Sweden

  • Average sea temperature in September: 14.8°C

The best month for swimming (with the highest average sea temperature) is August (18.7°C).
The coldest month (with the lowest average sea temperature) is February (1°C).

  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 18.3h).
The month with shortest days is December (Average daylight: 6.4h).