Norway
Trondheim in June: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Trondheim in June is climatically mixed. The average daily high is around 15 °C, and the sea is about 11 °C. With about 20 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
32/100 · #3
Warmth
#3
Dryness
#9
Sun
#1
Sea warmth
#5
Published best categories: none
Trondheim · JunePhoto: David Stanley from Nanaimo, Canada · CC BY 4.0Climate facts
- Average high
- 15 °C
- Average low
- 7 °C
- Sea
- 11 °C
- Rainy days (est.)
- 20 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 81 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| May | 11 | 3 | 18 | 96 | 5.7 | 80 | 0.8 | 8 | 26 |
| June (selected) | 15 | 7 | 20 | 141 | 6.1 | 81 | 0.6 | 11 | 32 |
| July | 18 | 10 | 20 | 135 | 5.7 | 83 | 0.5 | 13 | 39 |
How do the previous and next months compare?
Baseline: June (32/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| May | -6 | -3.7 °C | -3.9 °C | -1.9 | -45.9 mm | -0.4 h | -0.6 % | +0.3 m/s | -2.5 °C |
| July | +7 | +2.7 °C | +2.8 °C | +0.4 | -6.5 mm | -0.4 h | +2.1 % | -0.1 m/s | +2.4 °C |
All twelve months in context

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Where to stay in Trondheim
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Useful next decisions
Frequently asked questions
How warm is Trondheim in June?
The average daily high is around 15 °C, with an average daily low of about 7 °C.
Can you swim in Trondheim in June?
The sea is about 11 °C (cold).
Does it rain a lot in Trondheim in June?
The curated estimate is about 20 rainy days per month, not a directly measured long-term average. Total precipitation averages around 141 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Trondheim?
No month in Trondheim reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.