Trondheim weather by month & the best time to visit
Norway · seaside town · oceanic / maritime climate
The best time to visit Trondheim is July — its sunniest month (Sunshine Score 62/100). Trondheim averages about 1,425 hours of sunshine a year. Daytime highs around 20°C / 68°F and roughly 133 mm of rain in July.
When is the best time to visit Trondheim?
For sunshine, the best time to visit Trondheim is July. The dullest month is January (0/100, 129 mm of rain). The full month-by-month picture is in the table below.
How sunny is Trondheim?
Trondheim isn't a sunny place by world standards: about 1,425 hours of sunshine a year. 62 Sunshine Score points separate July (62) from January (0), so the month you pick matters. It ranks #18 of 36 destinations in Norway for annual sunshine, above the national median of 1,417 hours. The year's 1,483 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 0° / 32°F | -4° / 25°F | 129 mm | 0 | 2° / 36°F |
| February | 0 | 0° / 32°F | -4° / 25°F | 112 mm | 0 | 2° / 36°F |
| March | 0 | 3° / 37°F | -3° / 27°F | 117 mm | 1 | 4° / 39°F |
| April | 0 | 8° / 46°F | 1° / 34°F | 94 mm | 2 | 6° / 43°F |
| May | 29 | 13° / 55°F | 5° / 41°F | 94 mm | 3 | 13° / 55°F |
| June | 47 | 17° / 63°F | 9° / 48°F | 134 mm | 4 | 15° / 59°F |
| July | 62 | 20° / 68°F | 12° / 54°F | 133 mm | 4 | 17° / 63°F |
| August | 51 | 18° / 64°F | 11° / 52°F | 136 mm | 3 | 16° / 61°F |
| September | 30 | 14° / 57°F | 8° / 46°F | 149 mm | 1 | 15° / 59°F |
| October | 0 | 8° / 46°F | 3° / 37°F | 123 mm | 0 | 10° / 50°F |
| November | 0 | 3° / 37°F | 0° / 32°F | 122 mm | 0 | 7° / 45°F |
| December | 0 | 1° / 34°F | -3° / 27°F | 140 mm | 0 | 4° / 39°F |
Sea temperature in Trondheim by month
The sea off Trondheim is warmest in July at around 17°C / 63°F, and coolest in January at 2°C / 36°F. It never reaches comfortable swimming temperatures (21°C+). Month-by-month sea-surface temperatures are in the Sea column of the table above.
Nearest destinations
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Head-to-head
How Trondheim compares month by month: Trondheim vs Oslo (Gardermoen) · Trondheim vs Ålesund · Trondheim vs Molde · all comparisons
Trondheim: questions and answers
What kind of destination is Trondheim?
Trondheim is a seaside town in Norway with a oceanic / maritime climate — the sea reaches 17°C at its warmest.
How many hours of sunshine does Trondheim get a year?
Trondheim gets about 1,425 hours of sunshine a year, at its best around July.
When is the best time to visit Trondheim?
The sunniest time to visit Trondheim is July, when the Sunshine Score peaks at 62/100. Expect daytime highs around 20°C / 68°F.
What is the least sunny month in Trondheim?
January is the least sunny month in Trondheim, scoring 0/100 with about 129 mm of rain.
What is the sea temperature in Trondheim?
The sea in Trondheim ranges from about 2°C (January) to 17°C (July). Month-by-month sea temperatures are on this page.
How strong is the sun in Trondheim?
The typical midday UV index in Trondheim peaks around 4 (moderate) in June, easing to about 0 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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