The temperatures in Lillestrom in September are quite cold with temperatures between 8°C and 16°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Lillestrom during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Lillestrom in September 2026.
If you’re planning to visit Lillestrom in the near future, we highly recommend that you review the 14 day weather forecast for Lillestrom before you arrive.
Temperatures
16° / 8°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
69
mm
Sun Hours
8.7
Hrs
