Trondheim Weather by Month
Twelve months of Trondheim, Norway weather — averages from 2006–2025.
Trondheim's warmest month is July (average high 19°C (66.2°F)) and the coolest is January (-0.6°C (30.9°F)). The most rain falls in September (about 125 mm), and April is the driest (about 73 mm). May is the sunniest, with about 11.7 hours of sunshine a day.
Best months to visit Trondheim
Ranked within Trondheim's own year by temperature comfort, rainy days and sunshine — historical averages, not a forecast.
Trondheim month by month
January
PoorHigh -0.6°C (30.9°F)
Low -5.5°C (22.1°F)
- Rainfall
- 96 mm (3.8 in)
- Rainy days
- 16 rainy days
- Sunshine
- 1.9 h sunshine / day
February
PoorHigh 0.4°C (32.7°F)
Low -5.1°C (22.8°F)
- Rainfall
- 84 mm (3.3 in)
- Rainy days
- 14 rainy days
- Sunshine
- 4.2 h sunshine / day
March
PoorHigh 3.5°C (38.3°F)
Low -3°C (26.6°F)
- Rainfall
- 104 mm (4.1 in)
- Rainy days
- 16 rainy days
- Sunshine
- 6.8 h sunshine / day
April
FairHigh 7.8°C (46°F)
Low 0.2°C (32.4°F)
- Rainfall
- 73 mm (2.9 in)
- Rainy days
- 15 rainy days
- Sunshine
- 9.6 h sunshine / day
May
GoodHigh 13°C (55.4°F)
Low 4.7°C (40.5°F)
- Rainfall
- 73 mm (2.9 in)
- Rainy days
- 15 rainy days
- Sunshine
- 11.7 h sunshine / day
June
FairHigh 16.3°C (61.3°F)
Low 8.8°C (47.8°F)
- Rainfall
- 96 mm (3.8 in)
- Rainy days
- 16 rainy days
- Sunshine
- 11.7 h sunshine / day
July
GoodHigh 19°C (66.2°F)
Low 11.6°C (52.9°F)
- Rainfall
- 98 mm (3.9 in)
- Rainy days
- 16 rainy days
- Sunshine
- 11.7 h sunshine / day
August
FairHigh 17.9°C (64.2°F)
Low 10.9°C (51.6°F)
- Rainfall
- 111 mm (4.4 in)
- Rainy days
- 16 rainy days
- Sunshine
- 10 h sunshine / day
September
FairHigh 14.4°C (57.9°F)
Low 8.1°C (46.6°F)
- Rainfall
- 125 mm (4.9 in)
- Rainy days
- 16 rainy days
- Sunshine
- 7.5 h sunshine / day
October
PoorHigh 8.5°C (47.3°F)
Low 3.3°C (37.9°F)
- Rainfall
- 116 mm (4.6 in)
- Rainy days
- 18 rainy days
- Sunshine
- 4.8 h sunshine / day
November
PoorHigh 3.1°C (37.6°F)
Low -1.4°C (29.5°F)
- Rainfall
- 93 mm (3.7 in)
- Rainy days
- 15 rainy days
- Sunshine
- 2.6 h sunshine / day
December
PoorHigh 0.3°C (32.5°F)
Low -4.6°C (23.7°F)
- Rainfall
- 101 mm (4 in)
- Rainy days
- 16 rainy days
- Sunshine
- 1 h sunshine / day
More Norway cities by month
Based on 20 years of historical weather data (2006–2025) from Open-Meteo. Monthly averages, not a forecast.