May could be a good time to visit Trondheim, as the weather is generally fine. The average high temperature is around +55°F, and there are typically 2 sunny days in May. However, expect about 20 rainy days, and total monthly rainfall of approximately 83 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Good to know:
May is usually the driest month of the year in Trondheim
Average weather
☀️
+55°F
Avg. max. temperature
+23°F
Min.
+82°F
Max.
83 mm
Total precipitation
70%
Avg. humidity
1 m/s
Avg. wind
2 ☀️
Sunny Days
7 ⛅️
Cloudy
20 🌦
Rainy
Our opinion: Trondheim has OK weather in May.
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Average temperature in Trondheim in May
Here are the expected maximum, average and minimum temperatures in Trondheim for May based on the historical data.
Last Year
Historical Data
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:
The warmest water temperatures in Trondheim are reached in August, when the average sea temperature rises to +58°F. The coldest water temperatures are in March, with an average of +41°F.
Can you swim in Trondheim in May?
We would not recommend swimming in Trondheim in May, the water is very cold (+48°F on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +61°F
🏄♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in Trondheim in May
Trondheim weather looks like this, on average, in May and the surrounding months.
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 speed in Trondheim in May based on historical data.
Last Year
Historical Data
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
Amount of rainfall in mm during May in Trondheim based on historical data.
Last Year
Historical Data
Total precipitation in May is about 110 mm, with a 58% chance of rain on a typical day. The maximum amount of rainfall per day is around 19 mm, which is considered light rain.May is a pretty wet month with over 18 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
Here’s how May is compared with other months in the amount of precipitation, total mm:
Trondheim wettest month is August, where a typical day has a 74% chance of precipitation and 124 mm of rainfall per day. February, on the other hand, is the driest month with a mere 14% chance of precipitation and 38 mm of rainfall per day.
Snow
Amount of snow in mm during May in Trondheim based on historical data.
Last Year
Historical Data
The total snow in May is about 3 mm, with a 0% chance of snow on a typical day.
Here’s how May is compared with other months in the amount of snow, total mm:
How was the weather last May in Trondheim?
This is the weather in Trondheim in May 2023:
1 May
🌧️
+40°F
2 May
🌧️
+44°F
3 May
☁️
+43°F
4 May
☁️
+44°F
5 May
☀️
+52°F
6 May
☁️
+55°F
7 May
☁️
+58°F
8 May
☁️
+62°F
9 May
☁️
+63°F
10 May
☁️
+64°F
11 May
☁️
+63°F
12 May
☁️
+56°F
13 May
☁️
+63°F
14 May
☀️
+70°F
15 May
☁️
+59°F
16 May
🌧️
+53°F
17 May
🌧️
+43°F
18 May
☁️
+56°F
19 May
☁️
+64°F
20 May
☁️
+65°F
21 May
☁️
+63°F
22 May
☀️
+72°F
23 May
🌧️
+49°F
24 May
🌧️
+54°F
25 May
🌧️
+47°F
26 May
🌧️
+49°F
27 May
🌧️
+53°F
28 May
🌧️
+44°F
29 May
🌧️
+48°F
30 May
☁️
+53°F
31 May
🌧️
+47°F
In May 2023 Trondheim had 3 sunny days, 16 cloudy days, and 12 rainy days. The average maximum temperature was +55°F, with an absolute maximum of +72°F and a minimum of +41°F. The average humidity was 69%, with a maximum of 100% and a minimum of 21%. The average wind speed was 1 m/s, with a maximum of 6 m/s and a minimum of 0 m/s.
Are you planning a trip in May?
Climate Change Over the Years
This is how Trondheim climate has changed over the last 43 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
Frequently asked questions about the weather in Trondheim in May:
Is May a good time to visit Trondheim?
It’s always a good time to visit Trondheim, but the weather is changeable in May, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Trondheim in May?
May has mild temperatures in Trondheim. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Can you swim in Trondheim in May?
Swimming in Trondheim in May is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is Trondheim rainy in May?
Trondheim is often rainy in May. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Trondheim in May?
Usually, it’s not very sunny in Trondheim in May, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
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.
