Trondheim, Norway skyline

Trondheim Weather in May

Typical May weather in Trondheim, Norway, based on 2006–2025 climate averages.

In May, Trondheim averages a high of 13°C (55.4°F) and a low of 4.7°C (40.5°F), with about 15 rainy days (73 mm of rain) and 11.7 hours of sunshine a day.

Avg high

13°C (55.4°F)

Avg low

4.7°C (40.5°F)

Rainfall

73 mm (2.9 in)

Rainy days

15 days

Sunshine

11.7 h / day

Humidity

74%

May vs the rest of the year

Here is how every month in Trondheim stacks up against May — the 2nd driest month for rain.

MonthAvg highvs MayRainRainy days
January-0.6°C (30.9°F)−13.6°C (−24.5°F)96 mm16
February0.4°C (32.7°F)−12.6°C (−22.7°F)84 mm14
March3.5°C (38.3°F)−9.5°C (−17.1°F)104 mm16
April7.8°C (46°F)−5.2°C (−9.4°F)73 mm15
May13°C (55.4°F)—73 mm15
June16.3°C (61.3°F)+3.3°C (+5.9°F)96 mm16
July19°C (66.2°F)+6°C (+10.8°F)98 mm16
August17.9°C (64.2°F)+4.9°C (+8.8°F)111 mm16
September14.4°C (57.9°F)+1.4°C (+2.5°F)125 mm16
October8.5°C (47.3°F)−4.5°C (−8.1°F)116 mm18
November3.1°C (37.6°F)−9.9°C (−17.8°F)93 mm15
December0.3°C (32.5°F)−12.7°C (−22.9°F)101 mm16

What May feels like in Trondheim

May is late spring in Trondheim. Daytime feels cool and fresh rather than cold. Evenings bring a clear drop in temperature, and nights are cold. Damp air makes the cold feel rawer than the numbers alone suggest.

Rain in Trondheim in May

May is persistently wet here: some rain falls on about every other day. A rainy day brings about 4.9 mm (0.2 in) on average — steady rain rather than a passing shower. That is lighter than the city's yearly norm of about 6.2 mm per rainy day. It is among the three driest months of the year.

Daylight and sunshine in May

On 15 May the sun rises at about 4:14 am and sets around 10:15 pm local time, giving 18 h 2 min of daylight. Days are getting longer: 3 h 10 min more daylight than in mid-April. The sun is out for roughly 65% of those daylight hours, so there are plenty of bright spells.

How May compares to the rest of the year

May is the 5th warmest month of the year in Trondheim. Afternoons run 5.2°C (9.4°F) warmer than in April, with about the same rain. June continues the upward trend. The next month's average high: 16.3°C (61.3°F).

Who May suits

  • Sightseeing: a good fit — daytime temperatures are fine for walking around.
  • Parks & outdoor: less ideal — too cool to sit outside for long.
  • Beach: less ideal — the sea air is too cool.

Tips for visiting Trondheim in May

Versatile Layers

Days are noticeably warmer than nights — layers you can add or remove.

Rain Protection

A compact umbrella and a light waterproof jacket.

Warm Layers

Insulated layers and warm shoes for the cold hours.

Sunglasses

Bright days make sunglasses worth packing.

Quick questions

How warm is Trondheim in May?

It feels cool: typical highs are 13°C (55.4°F), with lows near 4.7°C (40.5°F).

Does it rain a lot in Trondheim in May?

It does: about 15 rainy days bring roughly 73 mm, so plan some indoor options.

What should I wear in Trondheim in May?

Based on the averages: versatile layers, rain protection, warm layers and sunglasses. Add a layer for after dark.

Is May or June better for visiting Trondheim?

May, narrowly: it ranks #1 of 12 among Trondheim's months, against #3 for the other. June is warmer and has more rainy days.

Is May a good time to visit Trondheim?

Good

Good — mild but cool days, frequent rain (about 15 rainy days), plenty of sunshine (11.7 h a day). Within Trondheim's own year, May ranks #1 of 12 — one of the 3 best months to visit.

May in other Norway cities

Warmer or drier places in May

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Monthly averages from 20 years of Open-Meteo history (2006–2025), not a forecast — see all 12 months in Trondheim weather by month.