Weather in Trondheim in July

Shoulder season. July is shoulder season in Trondheim — cheaper, quieter, and a genuine gamble. You should expect rain on 20 days of the month, which is more days wet than dry.

July is the highest-scoring month of the twelve. The nearest rival is August, and the month at the other end of the year is January.

Rain on 20 of the month's 31 days, 4 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average July reaches 30 °C. Across the twenty years measured, the hottest July day reached 31.9 °C and the coldest night fell to 5.6 °C, and the wettest single day dropped 50 mm — roughly 38% of the month's rain in one day.

July is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest July on record still delivered 266 mm against 54 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 133 mm average is a reasonable planning figure, not a promise.

Wind is light at 1.8 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How July sits in the year

This is a turning point in the year — June and August sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in July

19.5 hours of daylight, losing 2.4 hours across the month. That is between Trondheim's extremes of 20.5 and 4.6 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 13.1 °C in July — too cold to swim without a wetsuit. This is the warmest the water gets all year.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

July in Trondheim versus nearby

If Trondheim is one option among several, the nearby comparison is worth making. Oslo is close enough to be a coin toss — 2.4 °C warmer, 2 days less rain. Bergen is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: July is the answer for Trondheim. If it is booked out or priced out, August is the next best thing at 3 points behind, and January is the month to keep off the shortlist.

Every month in Trondheim

See all twelve months in Trondheim, or where else to go in July.