Weather in Trondheim in May 2025
- May is usually the driest month of the year in Trondheim
Average weather
Average temperature in Trondheim in May
The expected average maximum temperature in May is +55°F with a maximum of +72°F and a minimum of +28°F.
The average maximum temperature goes up 17% by the end of the month, compared with the beginning of the month, from +41°F to +48°F.
Is Trondheim warm or cold in May?
Trondheim is typically mild in May.
Maximum temperatures go up compared to the previous month from +46°F to +55°F. The minimum temperature also goes up from +34°F to +41°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how May is compared to other months in Trondheim:
Water temperature in Trondheim in May
Water in Trondheim in May is Cold. It varies from +43°F to +52°F, with an average of +48°F. This is almost similar to the air temperature, which averages +55°F.
In May, water temperatures are average relative to the rest of the year:
Can you swim in Trondheim in May?
Climate in Trondheim in May
| April | May | June | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +46°F | +55°F | +61°F | ||||
| Min. temperature | ||||||
| +10°F | +23°F | +36°F | ||||
| Max. temperature | ||||||
| +72°F | +82°F | +90°F | ||||
| Rainfall | ||||||
| 59 mm | 83 mm | 106 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Avg. water temperature | ||||||
| +43°F | +48°F | +54°F | ||||
| Humidity | ||||||
| 71% | 70% | 73% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1012 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 1 | ||||
| Cloudy days | ||||||
| 8 | 7 | 7 | ||||
| Rainy days | ||||||
| 12 | 20 | 22 | ||||
| Snowy days | ||||||
| 8 | 2 | 0 | ||||
May weather is still as ok as in April. It’s getting warmer as May arrives. The average maximum temperature goes up from +46°F to +55°F during the day. Prepare for more rain. Average rainfall goes from 59 mm to 83 mm. It feels drier, as humidity decreases from 71% to 70%. The average wind speed doesn’t change much during May, staying around 1 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
But maybe it is worth considering traveling in June as the weather gets better.
Wind
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Trondheim is gradually increasing during May, going from 1 m/s to 1 m/s over the course of the month.
Rain
Snow
Here’s how May is compared with other months in the amount of snow, total mm:
How was the weather last May in Trondheim?
Climate Change Over the Years
The climate in Trondheim in May has not changed that much over the last 43 years.
The average temperature was the lowest in 1981 (+45°F) and the highest in 2014 (+52°F). The driest year was 2002 with only 617 mm of rainfall, and the wettest year was 2007 with 1311 mm.
FAQ
Is May a good time to visit Trondheim?
Can you sunbathe in Trondheim in May?
Can you swim in Trondheim in May?
Is Trondheim rainy in May?
Is it sunny in Trondheim in May?
Other cities in Norway
Monthly weather in Trondheim
Source of the data
For this page, we’ve looked at the typical weather in Trondheim, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.