Norway
Trondheim in May: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Trondheim in May is climatically mixed. The average daily high is around 11 °C, and the sea is about 8 °C. With about 18 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
26/100 · #4
Warmth
#5
Dryness
#4
Sun
#2
Sea warmth
#7
Published best categories: none
Trondheim · MayPhoto: David Stanley from Nanaimo, Canada · CC BY 4.0Climate facts
- Average high
- 11 °C
- Average low
- 3 °C
- Sea
- 8 °C
- Rainy days (est.)
- 18 rainy days (est.)
- Sun (est.)
- 6 h/day
- Humidity
- 80 %
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 |
|---|---|---|---|---|---|---|---|---|---|
| April | 6 | -1 | 16 | 93 | 4.5 | 86 | 1.2 | 6 | 21 |
| May (selected) | 11 | 3 | 18 | 96 | 5.7 | 80 | 0.8 | 8 | 26 |
| June | 15 | 7 | 20 | 141 | 6.1 | 81 | 0.6 | 11 | 32 |
How do the previous and next months compare?
Baseline: May (26/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| April | -5 | -5.2 °C | -4 °C | -1.4 | -2.2 mm | -1.2 h | +5.6 % | +0.4 m/s | -1.8 °C |
| June | +6 | +3.7 °C | +3.9 °C | +1.9 | +45.9 mm | +0.4 h | +0.6 % | -0.3 m/s | +2.5 °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 May?
The average daily high is around 11 °C, with an average daily low of about 3 °C.
Can you swim in Trondheim in May?
The sea is about 8 °C (cold).
Does it rain a lot in Trondheim in May?
The curated estimate is about 18 rainy days per month, not a directly measured long-term average. Total precipitation averages around 96 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.