Annual mean 5°C · wettest around December · prevailing wind SW
Warmest
20.6 °C
Coldest
-6.8 °C
Wettest
23%
Windiest
4.9 m/s
Prevailing
SW
3.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Sundsvall over the whole year is 5°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -7°C. Sundsvall has no sharply defined rainy season: the chance of rain on a given day runs from 7% in April, the driest month, to 21% in December, the wettest. Winds in Sundsvall are highest in May, averaging 3.6 m/s (13 km/h), and lightest in February, at 3.0 m/s (11 km/h). The prevailing wind is from the SW. The clearest skies in Sundsvall come in June, when the sky is typically 49% covered; November is the cloudiest month, at 70%.
Month by month Sundsvall 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
-6°C
-7°C
-10°C
16%
64%
3.1 m/s
0
0
0
February
-2°C
-5°C
-7°C
12%
60%
3.0 m/s
0
0
0
March
2°C
-3°C
-3°C
9%
57%
3.1 m/s
0
0
3
April
6°C
0°C
1°C
7%
52%
3.3 m/s
0
0
15
May
12°C
5°C
7°C
8%
51%
3.6 m/s
11
0
48
June
18°C
11°C
14°C
8%
49%
3.5 m/s
45
3
79
July
20°C
14°C
17°C
9%
52%
3.4 m/s
64
8
77
August
18°C
13°C
16°C
10%
58%
3.3 m/s
60
2
83
September
14°C
8°C
11°C
11%
65%
3.0 m/s
18
0
74
October
7°C
4°C
4°C
14%
67%
3.2 m/s
0
0
28
November
1°C
-0°C
-3°C
17%
70%
3.3 m/s
0
0
4
December
-3°C
-3°C
-7°C
21%
68%
3.1 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 Sundsvall weather by season
Year round, Sundsvall has days of about -6°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -7°C to 14°C through the year, and the average temperature over the year is 5°C around the clock. Rain is most likely around December and least likely around April. 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.
Sundsvall weather in winterDecember to February
High -3°CLow -5°CRain 16%
Winter in Sundsvall has typical daily highs of about -3°C and lows of about -5°C, with a 16% chance of rain on a given day.
Sundsvall weather in springMarch to May
High 7°CLow 1°CRain 8%
Spring in Sundsvall has typical daily highs of about 7°C and lows of about 1°C, with a 8% chance of rain on a given day.
Sundsvall weather in summerJune to August
High 18°CLow 12°CRain 9%
Summer in Sundsvall has typical daily highs of about 18°C and lows of about 12°C, with a 9% chance of rain on a given day.
Sundsvall weather in autumnSeptember to November
High 7°CLow 4°CRain 14%
Autumn in Sundsvall has typical daily highs of about 7°C and lows of about 4°C, with a 14% chance of rain on a given day.
When is the rainy season in Sundsvall?
Sundsvall has no sharply defined rainy season: the chance of rain on a given day runs from 7% in April, the driest month, to 21% in December, the wettest.
What time of year is Sundsvall windiest?
Winds in Sundsvall are highest in May, averaging 3.6 m/s (13 km/h), and lightest in February, at 3.0 m/s (11 km/h). The prevailing wind is from the SW.
What is the average temperature in Sundsvall year round?
The average temperature in Sundsvall over the whole year is 5°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -7°C.