Sundsvall monthly weather forecast

Monthly weather forecast for Sundsvall. ℃ Average temperatures % Humidity, precipitation ️ Sunrise and sunset ️ Wind direction and speed

31 August 2026, Monday
+13°C / +20°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+15°C
4
93%
1000
01:00
+15°C
2.5
96%
1000
02:00
+14°C
1.8
97%
1000
03:00
+13°C
3.2
97%
1000
04:00
+13°C
5
96%
1000
05:00
+13°C
5
95%
1000
06:00
+13°C
4
95%
1000
07:00
+13°C
5
93%
1000
08:00
+14°C
3.2
92%
1000
09:00
+14°C
3.2
90%
1000
10:00
+16°C
2.9
87%
1000
11:00
+18°C
2.9
84%
1000
12:00
+19°C
2.9
80%
1000
13:00
+20°C
3.2
78%
1000
14:00
+20°C
6.8
78%
1000
15:00
+20°C
9.4
82%
1000
16:00
+19°C
8.3
84%
1000
17:00
+19°C
6.1
85%
1000
18:00
+19°C
6.5
84%
1000
19:00
+19°C
5.8
87%
1001
20:00
+17°C
10.1
90%
1001
21:00
+17°C
13.3
92%
1001
22:00
+16°C
12.2
91%
1002
23:00
+15°C
12.2
88%
1002
01 September 2026, Tuesday
+11°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+14°C
10.1
87%
1003
01:00
+13°C
11.2
89%
1002
02:00
+13°C
9.7
90%
1002
03:00
+12°C
10.4
92%
1003
04:00
+12°C
13
91%
1003
05:00
+11°C
12.6
90%
1003
06:00
+11°C
12.2
89%
1003
07:00
+11°C
11.5
86%
1003
08:00
+12°C
13.3
81%
1003
09:00
+14°C
14.4
74%
1004
10:00
+15°C
13.7
67%
1004
11:00
+17°C
12.6
60%
1004
12:00
+19°C
11.9
53%
1004
13:00
+20°C
12.6
48%
1004
14:00
+21°C
12.2
45%
1004
15:00
+21°C
12.2
43%
1004
16:00
+21°C
11.9
42%
1004
17:00
+21°C
10.8
42%
1004
18:00
+21°C
9
42%
1004
19:00
+19°C
8.6
49%
1005
20:00
+17°C
6.8
54%
1005
21:00
+15°C
6.5
58%
1005
22:00
+14°C
6.5
61%
1005
23:00
+14°C
6.1
66%
1005
02 September 2026, Wednesday
+10°C / +21°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+13°C
6.1
73%
1005
01:00
+13°C
4.7
76%
1004
02:00
+12°C
4.7
76%
1004
03:00
+12°C
4.3
77%
1004
04:00
+12°C
2.9
77%
1004
05:00
+11°C
2.5
80%
1004
06:00
+11°C
2.2
81%
1003
07:00
+12°C
2.2
81%
1003
08:00
+14°C
2.5
79%
1003
09:00
+15°C
1.4
78%
1003
10:00
+17°C
1.1
72%
1003
11:00
+19°C
3.2
66%
1002
12:00
+20°C
5
62%
1002
13:00
+21°C
7.9
59%
1002
14:00
+21°C
6.1
60%
1001
15:00
+21°C
10.1
53%
1001
16:00
+21°C
10.4
50%
1001
17:00
+21°C
9.4
48%
1000
18:00
+20°C
13
49%
1000
19:00
+18°C
9.2
67%
1000
20:00
+15°C
6.3
82%
1000
21:00
+13°C
4.3
93%
1000
22:00
+11°C
4.2
100%
999
23:00
+10°C
9
100%
999
03 September 2026, Thursday
+8°C / +15°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+10°C
12.6
99%
999
01:00
+10°C
12.8
100%
1000
02:00
+9°C
12.1
99%
1000
03:00
+9°C
13.2
99%
1000
04:00
+9°C
13.3
98%
1000
05:00
+8°C
12.9
98%
1000
06:00
+8°C
12.6
99%
1000
07:00
+8°C
13.4
98%
1000
08:00
+10°C
14.4
95%
1000
09:00
+11°C
12.7
86%
1000
10:00
+12°C
15.3
74%
1000
11:00
+14°C
16
62%
1000
12:00
+15°C
16
55%
1000
13:00
+15°C
15.8
52%
1000
14:00
+15°C
13.3
51%
1000
15:00
+15°C
11.7
51%
1000
16:00
+14°C
15.1
56%
1001
17:00
+11°C
13.3
74%
1000
18:00
+11°C
12.5
88%
1000
19:00
+10°C
13.8
94%
1000
20:00
+10°C
16.6
93%
999
21:00
+9°C
16
96%
999
22:00
+9°C
14.7
98%
999
23:00
+9°C
13.7
98%
999
04 September 2026, Friday
+8°C / +16°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+9°C
13
99%
999
01:00
+9°C
13
99%
999
02:00
+8°C
13.7
98%
999
03:00
+8°C
14.3
98%
999
04:00
+8°C
14.7
98%
1000
05:00
+8°C
14.6
98%
1000
06:00
+8°C
14.5
98%
1000
07:00
+8°C
14.2
98%
1000
08:00
+9°C
13.4
95%
1000
09:00
+10°C
12.1
86%
1000
10:00
+12°C
11.2
75%
1000
11:00
+14°C
10.1
67%
1000
12:00
+15°C
7.7
62%
1000
13:00
+15°C
4.5
59%
1000
14:00
+16°C
2.6
57%
1000
15:00
+16°C
1.4
54%
999
16:00
+16°C
0.6
52%
999
17:00
+16°C
0.7
52%
999
18:00
+14°C
2
58%
999
19:00
+12°C
4.3
70%
999
20:00
+10°C
5.7
81%
999
21:00
+9°C
5.9
86%
999
22:00
+8°C
7
88%
999
23:00
+8°C
8.6
89%
999
05 September 2026, Saturday
+7°C / +17°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+7°C
8.8
89%
998
01:00
+7°C
8.3
89%
998
02:00
+7°C
8.1
89%
998
03:00
+7°C
8.4
91%
999
04:00
+7°C
8.9
94%
999
05:00
+7°C
9.2
95%
999
06:00
+8°C
9.1
95%
999
07:00
+9°C
8.8
93%
999
08:00
+10°C
8.7
89%
1000
09:00
+12°C
9
79%
1000
10:00
+14°C
9.9
68%
1000
11:00
+15°C
11
61%
1000
12:00
+16°C
11.5
57%
1000
13:00
+16°C
11.8
55%
1001
14:00
+16°C
11.7
54%
1001
15:00
+17°C
11
53%
1001
16:00
+17°C
9.7
52%
1001
17:00
+16°C
8.2
54%
1001
18:00
+15°C
5.7
62%
1002
19:00
+13°C
3
76%
1002
20:00
+11°C
1.7
88%
1002
21:00
+10°C
2.7
93%
1003
22:00
+9°C
5
95%
1003
23:00
+9°C
6.9
96%
1004
06 September 2026, Sunday
+7°C / +17°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+8°C
5.6
97%
1004
01:00
+8°C
6.9
98%
1004
02:00
+8°C
7.8
99%
1005
03:00
+7°C
8.1
99%
1005
04:00
+7°C
8.3
100%
1005
05:00
+8°C
8.6
100%
1006
06:00
+8°C
8.4
100%
1006
07:00
+8°C
8.5
98%
1006
08:00
+9°C
8.4
93%
1006
09:00
+10°C
8.4
85%
1006
10:00
+12°C
8.4
74%
1007
11:00
+13°C
8.5
64%
1007
12:00
+15°C
8.4
56%
1007
13:00
+16°C
8.2
50%
1007
14:00
+17°C
7.9
48%
1007
15:00
+16°C
7.5
50%
1007
16:00
+15°C
7.1
55%
1007
17:00
+14°C
6.8
63%
1007
18:00
+13°C
6.7
73%
1007
19:00
+11°C
7
83%
1007
20:00
+10°C
7.4
90%
1007
21:00
+10°C
8
94%
1007
22:00
+9°C
9
96%
1007
23:00
+9°C
9.9
96%
1007
07 September 2026, Monday
+8°C / +16°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+9°C
10.9
95%
1007
01:00
+8°C
11.9
95%
1007
02:00
+8°C
12.5
93%
1007
03:00
+8°C
12.9
93%
1007
04:00
+8°C
13
92%
1007
05:00
+9°C
13.2
91%
1007
06:00
+9°C
13.2
89%
1007
07:00
+9°C
13.2
86%
1007
08:00
+10°C
12.9
82%
1007
09:00
+11°C
12.5
76%
1007
10:00
+12°C
11.9
68%
1006
11:00
+14°C
11.3
60%
1006
12:00
+15°C
10.5
54%
1006
13:00
+16°C
9.9
50%
1006
14:00
+16°C
9.2
48%
1006
15:00
+16°C
8.6
49%
1006
16:00
+15°C
8
52%
1006
17:00
+14°C
7.5
57%
1006
18:00
+13°C
7
63%
1006
19:00
+12°C
6.8
69%
1006
20:00
+11°C
7
74%
1006
21:00
+10°C
7.6
78%
1006
22:00
+10°C
8.6
81%
1006
23:00
+9°C
9.8
84%
1007
08 September 2026, Tuesday
+8°C / +15°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+9°C
11.2
86%
1007
01:00
+8°C
12.4
88%
1007
02:00
+8°C
13.2
89%
1008
03:00
+8°C
13.8
90%
1008
04:00
+8°C
14.2
90%
1008
05:00
+8°C
14.6
89%
1008
06:00
+8°C
14.6
87%
1008
07:00
+9°C
14.8
84%
1009
08:00
+9°C
14.7
81%
1009
09:00
+10°C
14.6
75%
1009
10:00
+12°C
14.5
68%
1009
11:00
+13°C
14.4
61%
1008
12:00
+14°C
14.1
55%
1008
13:00
+15°C
13.4
51%
1008
14:00
+15°C
12.5
50%
1008
15:00
+15°C
11
51%
1008
16:00
+14°C
8.7
54%
1008
17:00
+13°C
6.2
60%
1007
18:00
+12°C
3.7
66%
1007
19:00
+11°C
1.7
73%
1007
20:00
+10°C
0.2
78%
1007
21:00
+10°C
0.7
81%
1006
22:00
+9°C
1.1
83%
1006
23:00
+8°C
1.3
84%
1006
09 September 2026, Wednesday
+8°C / +15°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+8°C
1.5
85%
1005
01:00
+8°C
1.9
86%
1005
02:00
+8°C
1.8
87%
1005
03:00
+8°C
1.4
89%
1004
04:00
+8°C
1
92%
1004
05:00
+8°C
1.7
95%
1003
06:00
+8°C
2.5
97%
1002
07:00
+9°C
3
98%
1002
08:00
+9°C
2.8
96%
1001
09:00
+10°C
2.6
92%
1001
10:00
+11°C
4.1
85%
1000
11:00
+13°C
7.3
77%
1000
12:00
+14°C
10.7
70%
999
13:00
+15°C
13.5
66%
998
14:00
+15°C
15.3
64%
998
15:00
+15°C
15.8
66%
997
16:00
+14°C
15.7
71%
996
17:00
+13°C
15.3
78%
996
18:00
+12°C
14.8
86%
995
19:00
+12°C
14.7
93%
994
20:00
+11°C
13.9
99%
993
21:00
+11°C
12.4
100%
992
22:00
+11°C
9.9
100%
992
23:00
+11°C
7.5
100%
991
10 September 2026, Thursday
+10°C / +14°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+11°C
5.6
100%
990
01:00
+12°C
5.2
100%
989
02:00
+12°C
6.1
99%
989
03:00
+12°C
7
99%
988
04:00
+11°C
7.9
99%
988
05:00
+11°C
8.7
99%
989
06:00
+11°C
9.2
99%
989
07:00
+10°C
9.6
99%
989
08:00
+10°C
9.7
98%
989
09:00
+11°C
9.7
96%
989
10:00
+12°C
9.4
94%
989
11:00
+12°C
9
91%
990
12:00
+13°C
8.6
89%
990
13:00
+14°C
7.9
87%
990
14:00
+14°C
6.8
87%
990
15:00
+14°C
5.2
88%
990
16:00
+13°C
3.5
90%
989
17:00
+13°C
3
93%
989
18:00
+12°C
5
96%
989
19:00
+11°C
7.3
99%
989
20:00
+11°C
9.3
100%
989
21:00
+11°C
10.8
100%
989
22:00
+10°C
12.2
100%
990
23:00
+10°C
13.5
99%
990
11 September 2026, Friday
+9°C / +16°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+9°C
14.9
98%
991
01:00
+9°C
16.2
96%
991
02:00
+9°C
16.9
94%
992
03:00
+9°C
17.1
93%
992
04:00
+9°C
17
92%
993
05:00
+9°C
16.5
91%
993
06:00
+9°C
15.9
89%
993
07:00
+9°C
15.5
87%
994
08:00
+10°C
15.2
83%
994
09:00
+11°C
15.2
77%
994
10:00
+12°C
15.5
70%
995
11:00
+13°C
15.7
63%
995
12:00
+15°C
16
57%
995
13:00
+16°C
16.3
52%
996
14:00
+16°C
16.7
50%
996
15:00
+16°C
17
50%
997
16:00
+15°C
17.5
52%
998
17:00
+15°C
18.1
56%
998
18:00
+13°C
18.6
60%
999
19:00
+12°C
18.9
64%
1000
20:00
+12°C
19.2
67%
1001
21:00
+11°C
19
70%
1002
22:00
+11°C
18.7
72%
1002
23:00
+10°C
18
74%
1003
12 September 2026, Saturday
+8°C / +15°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+10°C
17.6
76%
1004
01:00
+9°C
17.1
77%
1005
02:00
+9°C
16.9
77%
1005
03:00
+9°C
16.8
77%
1006
04:00
+9°C
16.9
76%
1006
05:00
+9°C
17.1
74%
1007
06:00
+9°C
17.2
72%
1007
07:00
+9°C
17.3
70%
1008
08:00
+9°C
17.3
67%
1008
09:00
+10°C
17.2
64%
1008
10:00
+11°C
17.1
59%
1008
11:00
+12°C
17.2
55%
1009
12:00
+14°C
17.2
51%
1009
13:00
+15°C
17.1
48%
1009
14:00
+15°C
16.8
47%
1009
15:00
+15°C
16
47%
1010
16:00
+14°C
14.9
49%
1010
17:00
+13°C
13.5
52%
1011
18:00
+12°C
12.4
55%
1011
19:00
+11°C
11.5
59%
1011
20:00
+10°C
11.1
62%
1012
21:00
+9°C
11.1
65%
1012
22:00
+8°C
11.6
69%
1012
23:00
+8°C
12.1
73%
1013
13 September 2026, Sunday
+7°C / +15°C
Hour
Temperature
Wind (km/h)
Humidity
Weather
Pressure
00:00
+7°C
12.8
77%
1013
01:00
+7°C
13.3
80%
1013
02:00
+7°C
13.6
82%
1014
03:00
+7°C
13.8
84%
1014
04:00
+7°C
13.6
86%
1014
05:00
+7°C
13.5
88%
1015
06:00
+7°C
13.2
88%
1015
07:00
+8°C
13
87%
1015
08:00
+8°C
13
84%
1016
09:00
+9°C
13.1
78%
1016
10:00
+11°C
13.4
69%
1016
11:00
+12°C
13.9
61%
1016
12:00
+14°C
14.4
54%
1016
13:00
+15°C
14.5
49%
1017
14:00
+15°C
14.3
47%
1017
15:00
+15°C
13.4
47%
1017
16:00
+14°C
12.1
50%
1017
17:00
+13°C
10.5
55%
1018
18:00
+11°C
9.1
61%
1018
19:00
+10°C
8.1
67%
1018
20:00
+9°C
7.7
72%
1018
21:00
+8°C
7.8
75%
1019
22:00
+8°C
8.3
78%
1019
23:00
+7°C
9.1
81%
1019


Climate Characteristics of Sundsvall

Where North Meets South

Sundsvall enjoys a unique geographical position, granting it a humid-maritime climate with continental influences. Surrounded by two prominent hills (Norra and Södra Stadsberget), the historic "Stone City" is protected from harsh winds. Unlike the south, winters are stable and snowy, yet much milder than in the Arctic north.

A Winter of Adventure

Winter in Sundsvall is stable and accessible, with temperatures typically between -2°C and -6°C (21-28°F). The snow stays for months, making the surrounding hills popular spots for both alpine and cross-country skiing, just minutes from the city center.

Green, Luminous Summer

With its mid-northern location, Sundsvall enjoys very long summer days. Temperatures are exceptionally pleasant, around 20-23°C (68-73°F). This is when the city truly wakes up, with cafes lining the pedestrian streets and residents heading to nearby Baltic beaches.

Weather in Sundsvall by Month

January

The coldest month. -3°C (27°F) daytime and -9°C (16°F) at night. The city is blanketed in white; the air is crisp and often clear. Great for city-hill winter activities.

February

Stable winter, ideal for skiing. -2°C (28°F) daytime. Snow accumulation is usually at its peak. The sun reflects brilliantly off the snow despite low temperatures.

March

The transition from snow to sun. 2°C (36°F) daytime. Nights remain freezing, but midday sun is strong enough to start melting roof snow. Visibility is excellent.

April

The big thaw. 7°C (45°F) daytime. Snow vanishes from streets as nature wakes up. Volatile weather with cold Baltic breezes and occasional late flurries.

May

Burst of green. 14°C (57°F) daytime. A very dry and bright month. Forests turn lush green and low humidity makes for perfect hiking conditions.

June

Month of near-eternal light. 19°C (66°F) daytime. Incredibly long days. The city is vibrant, and sea breezes keep the air fresh and comfortable.

July

The warmest month. 22°C (72°F) daytime and 12°C (54°F) at night. Sunny and warm. Peak time for beach visits and hill-top picnics overlooking the sea.

August

Refreshing summer. 21°C (70°F) daytime. Nights cool down but days remain summery. Rainfall increases toward the end of the month with frequent morning mists.

September

Clear, golden autumn. 15°C (59°F) daytime. Deep blue skies return. Foliage in the surrounding forests is spectacular, and the air turns crisp and dry.

October

Rapid cooling. 9°C (48°F) daytime. Days shorten and rains become frequent. A dramatic transition month as the city prepares for the first snow.

November

The dark and grey month. 3°C (37°F) daytime. Sunshine is rare. Cold rains and mists are routine until the first permanent snow arrives.

December

Festival of light. -1°C (30°F) daytime and -6°C (21°F) at night. Christmas markets open in the historic center, and fresh snow creates a festive postcard atmosphere.

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