Annual mean 3°C · wettest around March · prevailing wind SW
Warmest
15.5 °C
Coldest
-3.8 °C
Wettest
72%
Windiest
6.0 m/s
Prevailing
SW
4.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Tromsø over the whole year is 3°C. July is the hottest month, with highs of about 14°C; January is the coldest, with lows of about -4°C. Tromsø has no sharply defined rainy season: the chance of rain on a given day runs from 33% in July, the driest month, to 57% in March, the wettest. Winds in Tromsø are highest in January, averaging 5.4 m/s (19 km/h), and lightest in July, at 3.2 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in Tromsø come in January, when the sky is typically 64% covered; August is the cloudiest month, at 71%.
Month by month Tromsø climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
-3°C
-4°C
-10°C
46%
64%
5.4 m/s
0
0
0
February
-2°C
-3°C
-9°C
50%
65%
5.3 m/s
0
0
0
March
-1°C
-3°C
-7°C
57%
70%
5.0 m/s
0
0
0
April
2°C
-0°C
-3°C
43%
64%
4.1 m/s
0
0
4
May
7°C
4°C
2°C
34%
69%
4.2 m/s
3
0
21
June
11°C
8°C
7°C
46%
71%
3.8 m/s
9
0
47
July
14°C
11°C
12°C
33%
65%
3.2 m/s
29
2
71
August
13°C
10°C
11°C
39%
71%
3.5 m/s
24
1
68
September
10°C
7°C
6°C
44%
68%
3.9 m/s
5
0
46
October
4°C
3°C
-1°C
37%
67%
4.2 m/s
0
0
9
November
0°C
0°C
-5°C
42%
64%
4.8 m/s
0
0
1
December
-2°C
-2°C
-8°C
44%
65%
5.0 m/s
0
0
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Tromsø weather by season
Year round, Tromsø has days of about -3°C at their warmest in January, its coolest month, and 14°C in July, its warmest; the coolest hours of the day run from -4°C to 11°C through the year, and the average temperature over the year is 3°C around the clock. Rain is most likely around March and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Tromsø weather in winterDecember to February
High -2°CLow -3°CRain 47%
Winter in Tromsø has typical daily highs of about -2°C and lows of about -3°C, with a 47% chance of rain on a given day.
Tromsø weather in springMarch to May
High 3°CLow 0°CRain 45%
Spring in Tromsø has typical daily highs of about 3°C and lows of about 0°C, with a 45% chance of rain on a given day.
Tromsø weather in summerJune to August
High 13°CLow 10°CRain 39%
Summer in Tromsø has typical daily highs of about 13°C and lows of about 10°C, with a 39% chance of rain on a given day.
Tromsø weather in autumnSeptember to November
High 5°CLow 3°CRain 41%
Autumn in Tromsø has typical daily highs of about 5°C and lows of about 3°C, with a 41% chance of rain on a given day.
When is the rainy season in Tromsø?
Tromsø has no sharply defined rainy season: the chance of rain on a given day runs from 33% in July, the driest month, to 57% in March, the wettest.
What time of year is Tromsø windiest?
Winds in Tromsø are highest in January, averaging 5.4 m/s (19 km/h), and lightest in July, at 3.2 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in Tromsø year round?
The average temperature in Tromsø over the whole year is 3°C. July is the hottest month, with highs of about 14°C; January is the coldest, with lows of about -4°C.