December could be a good time to visit Trondheim, as the weather is generally fine. The average high temperature is around +34°F, and there are typically 2 sunny days in December. However, expect about 14 snowy days, and total monthly rainfall of approximately 59 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Good to know:
December is usually the wettest month of the year in Trondheim;
Average weather
☀️
+34°F
Avg. max. temperature
-8°F
Min.
+55°F
Max.
59 mm
Total precipitation
80%
Avg. humidity
2 m/s
Avg. wind
2 ☀️
Sunny Days
10 ⛅️
Cloudy
5 🌦
Rainy
Our opinion: Trondheim has OK weather in December.
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Average temperature in Trondheim in December
Here are the expected maximum, average and minimum temperatures in Trondheim for December based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in December is +27°F with a maximum of +46°F and a minimum of +1°F.
The average maximum temperature goes up 28% by the end of the month, compared with the beginning of the month, from +18°F to +30°F.
Is Trondheim warm or cold in December?
Trondheim is typically chill in December.
Maximum temperatures go down compared to the previous month from +39°F to +34°F. The minimum temperature also goes down from +30°F to +25°F.
Pack a jumper and a jacket as there will be cooler temperatures.
December is one of the coolest months in Trondheim, here is the comparison with other months:
Water temperature in Trondheim in December
Water in Trondheim in December is Cold. It varies from +42°F to +49°F, with an average of +45°F.Note that the air temperature is lower than the water temperature, averaging around +34°F.
In December, 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 December?
We would not recommend swimming in Trondheim in December, the water is very cold (+45°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 December
Trondheim weather looks like this, on average, in December and the surrounding months.
November
December
January
Avg. temperature
+39°F
+34°F
+32°F
Min. temperature
0°F
-8°F
-27°F
Max. temperature
+61°F
+55°F
+54°F
Rainfall
62 mm
59 mm
49 mm
Wind
2 m/s
2 m/s
2 m/s
Avg. water temperature
+48°F
+45°F
+43°F
Humidity
80%
80%
79%
Air pressure
1006 HPa
1005 HPa
1005 HPa
Sunny days
2
2
2
Cloudy days
9
10
9
Rainy days
9
5
4
Snowy days
10
14
16
December weather is still as ok as in November.It’s getting colder in December. From +39°F in the day, the average maximum temperature lowers to +34°F.As December arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 62 mm to 59 mm.Humidity levels don’t change as the month goes on, averaging around 80%.The average wind speed doesn’t change much during December, staying around 2 m/s.The amount of sunny days stay about the same, averaging 2 sunny days during the month.
January brings much the same weather, it remains ok.
Wind speed in Trondheim in December based on historical data.
Last Year
Historical Data
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Trondheim is gradually increasing during December, going from 1 m/s to 3 m/s over the course of the month.
Rain
Amount of rainfall in mm during December in Trondheim based on historical data.
Last Year
Historical Data
Total precipitation in December is about 42 mm, with a 13% chance of rain on a typical day. The maximum amount of rainfall per day is around 23 mm, which is considered light rain.Trondheim is amazing in December with as little as 4 rainy days on average, so plan adventures in the great outdoors.
Here’s how December 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 December in Trondheim based on historical data.
Last Year
Historical Data
The total snow in December is about 65 mm, with a 16% chance of snow on a typical day.
December is one of the snowiest months in Trondheim.
Here’s how December is compared with other months in the amount of snow, total mm:
How was the weather last December in Trondheim?
This is the weather in Trondheim in December 2023:
1 December
☁️
+18°F
2 December
☁️
+13°F
3 December
☁️
+11°F
4 December
☁️
+10°F
5 December
☁️
+12°F
6 December
☁️
+13°F
7 December
☁️
+12°F
8 December
☁️
+24°F
9 December
☁️
+32°F
10 December
☁️
+32°F
11 December
☀️
+27°F
12 December
☁️
+22°F
13 December
☀️
+17°F
14 December
☁️
+20°F
15 December
🌨️
+35°F
16 December
🌧️
+46°F
17 December
🌧️
+38°F
18 December
🌧️
+42°F
19 December
🌨️
+38°F
20 December
☁️
+29°F
21 December
☁️
+30°F
22 December
🌨️
+30°F
23 December
🌨️
+28°F
24 December
☁️
+26°F
25 December
☁️
+29°F
26 December
☁️
+35°F
27 December
🌨️
+32°F
28 December
☁️
+29°F
29 December
☁️
+28°F
30 December
☁️
+27°F
31 December
☀️
+30°F
In December 2023 Trondheim had 3 sunny days, 20 cloudy days, and 3 rainy days. The average maximum temperature was +27°F, with an absolute maximum of +46°F and a minimum of +10°F. The average humidity was 86%, with a maximum of 98% and a minimum of 64%. 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 December?
Climate Change Over the Years
This is how Trondheim climate has changed over the last 43 years.
The climate in Trondheim in December 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 December:
Is December a good time to visit Trondheim?
It’s always a good time to visit Trondheim, but the weather is changeable in December, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Trondheim in December?
Not really, December is not the best time to sunbathe, unless you visit a local solarium.
Can you swim in Trondheim in December?
Swimming in Trondheim in December is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is Trondheim rainy in December?
Trondheim is often rainy in December. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Trondheim in December?
Usually, it’s not very sunny in Trondheim in December, 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.
