Trondheim weather
At 3:45 AM local time it was drizzle and 9°C (48°F). Mostly light, on-and-off rain; heavier around 5 AM, 6 AM, 7 AM (6.7 mm total). Best months for weather: Jun–Aug. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Trondheim, Trøndelag, Norway.
Current conditions
- Clouds
- 100%
- Chance of rain
- 99%
- Rain
- 0.4 mm/h
Hourly Forecast
Mostly light, on-and-off rain; heavier around 5 AM, 6 AM, 7 AM (6.7 mm total)
Daily Forecast
Best Time to Visit
Peak season Jun–AugOff season Oct–Apr
About Trondheim weather
Is it raining in Trondheim right now?
Yes. It’s drizzle and 9° right now. Mostly light, on-and-off rain; heavier around 5 AM, 6 AM, 7 AM (6.7 mm total).
What’s the weather like in Trondheim this week?
Over the next 7 days, expect highs of 7–10° and lows of 4–9°. Rain is likely on 5 of 7 days (Sunday, Tuesday, Wednesday, Thursday, Saturday). The driest day looks like Friday.
Has it been raining in Trondheim lately?
In the past 7 days, Trondheim had 2 rainy days and 9.0 mm of rain in total.
What should I pack for Trondheim?
For the coming week, bring an umbrella or rain jacket and a warm layer for the evenings.
Trondheim weather by month
When is the best time to visit Trondheim?
Based on weather alone, the best time to visit Trondheim is Jun–Aug, according to NASA's 2001–2025 climate averages. Oct–Apr tends to be the least pleasant. Average highs run from -2°C (29°F) in January to 18°C (64°F) in July.
What is the rainiest month in Trondheim?
September is the wettest month, with about 149 mm (5.9 in) of rain on average. May is the driest, with about 94 mm (3.7 in).
What is the hottest month in Trondheim?
July is the warmest, with average highs of 18°C (64°F) and lows of 10°C (50°F). January is the coolest, with highs of -2°C (29°F) and lows of -6°C (22°F).
Does Trondheim have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is September at about 149 mm (5.9 in).
How warm is the sea in Trondheim?
The sea is warmest in July at about 17°C (62°F) and coolest in February at about 3°C (38°F). It stays cool all year.
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine, forecast and current conditions from Open-Meteo. Page updated . How we rate months