Sundsvall weather and climate in 2025
Day
21 °C
Night
11 °C
Sea
15 °C
Precipitation
69 mm
in month
Rainy days
10 days
in month
Daylight
18 hours
average
Sunshine
7 hours
average
Humidity
71 %
Day
21 °C
Night
11 °C
Sea
15 °C
Precipitation
69 mm
in month
Rainy days
10 days
in month
Daylight
18 hours
average
Sunshine
7 hours
average
Humidity
71 %
Overview: Sundsvall
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Weather overview for Sundsvall
Weather overview
Sundsvall (Sweden) in general has a mild continental climate. Temperatures during the day are in the range from -2 °C (28 °F) in January to 21 °C (70 °F) in July. Temperatures during the night go from -10 °C (14 °F) in February to 11 °C (53 °F) in July. The driest month is April with just 8 days of rain, on the contrary, the month when it rains the most is December with 11 days of rain.
January weather
The night temperature descents similarly to the previous month, the value of this measure is -10 °C (14 °F) in Sundsvall, while the minimum of the day temperature is observable, its value is -2 °C (28 °F). The wind speed reaches its maximum in January. The humidity is on its maximum in January.
February weather
The beginning of the rise of the day temperature could be noticed, with its value of -1 °C (30 °F) in Sundsvall, while the night temperature is on its minimum, with its value being -10 °C (14 °F). The rainfall amount reaches its minimum, its value is 36 mm (1.41 in), while the number of rainy days starts to descent, the value of this measure is 8 days. The minimum of the wind speed can be noticed, the value of this measure is 3. The number of sun hours (without clouds) starts to rise in this month.
March weather
The beginning of the rise of the rainfall amount could be noticed, the value of this measure is 42 mm (1.64 in) in Sundsvall. The day temperature continues to rise, with its value of 3 °C (37 °F), while the beginning of the rise of the night temperature could be noticed, with its value being -6 °C (21 °F). The number of sun hours (without clouds) rises similarly to the previous month, with its value being 3 hours.
April weather
The rise of the day temperature can be observed, its value is 8 °C (46 °F) in Sundsvall, and the night temperature continues to rise too, its value is -1 °C (30 °F). The number of sun hours (without clouds) continues to rise, with its value of 5 hours. The number of rainy days reaches its minimum in this month.
May weather
The night temperature continues to rise, the value of this measure is 3 °C (38 °F) in Sundsvall, and the rise of the day temperature can be observed too, the value of this measure is 14 °C (57 °F). The number of sun hours (without clouds) continues to rise, the value of this measure is 7 hours.
June weather
The tourist season is at its beginning in Sundsvall. The day temperature continues to rise, its value is 18 °C (65 °F). The rainfall amount rise's start could be observed, its value is 57 mm (2.25 in), and the number of rainy days rise's start could be observed too, the value of this measure is 9 days. The number of sun hours (without clouds) reaches its maximum, with its value of 8 hours. The minimum of the humidity can be noticed in this month.
July weather
The ongoing tourist season is noticeable this month in Sundsvall. The rise of the number of rainy days can be observed, with its value being 10 days, and the rise of the rainfall amount can be observed too, the value of this measure is 69 mm (2.73 in). The maximum of the day temperature is observable, with its value of 21 °C (70 °F), and the night temperature reaches its maximum as well. The number of sun hours (without clouds) starts to descent, the value of this measure is 7 hours.
August weather
The beginning of the descent of the day temperature could be noticed, the value of this measure is 20 °C (67 °F) in Sundsvall, and the night temperature starts to descent too in this month. The ongoing tourist season is noticeable. The rise of the number of rainy days can be observed, with its value of 11 days, while the rainfall amount is on its maximum in August. The descent of the number of sun hours (without clouds) can be observed, its value is 6 hours.
September weather
The day temperature descents similarly to the previous month, with its value being 14 °C (58 °F) in Sundsvall, and the descent of the night temperature can be observed as well, the value of this measure is 6 °C (42 °F). The number of rainy days starts to descent, the value of this measure is 10 days, and the rainfall amount starts to descent too, with its value being 68 mm (2.68 in). The descent of the number of sun hours (without clouds) can be observed, its value is 4 hours.
October weather
The beginning of the rise of the number of rainy days could be noticed in this month in Sundsvall. The descent of the day temperature can be observed, with its value being 8 °C (47 °F), and the night temperature descents similarly to the previous month as well, its value is 1 °C (34 °F). The number of sun hours (without clouds) continues to descent, its value is 3 hours.
November weather
The day temperature descents similarly to the previous month in Sundsvall, and the descent of the night temperature can be observed as well, with its value being -4 °C (25 °F). The number of sun hours (without clouds) descents similarly to the previous month.
December weather
The descent of the day temperature can be observed, its value is -2 °C (29 °F) in Sundsvall, and the night temperature descents similarly to the previous month too, with its value of -8 °C (17 °F). The number of rainy days reaches its maximum, with its value being 11 days, while the rainfall amount descent's start could be observed, with its value being 52 mm (2.04 in). The number of sun hours (without clouds) is on its minimum in this month. The day length is on its minimum.
FAQs
What is the night temperature in May in Sundsvall?
The average night temperature in May in Sundsvall is 3 °C (38 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
How many days of precipitation on average can I expect in June in Sundsvall?
There are 9 days, which are rainy in Sundsvall in June, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.2 days of the week, or in general - 32 % days.
Is there a wet season in Sundsvall in July?
No, there is no wet season in Sundsvall in July - you can expect 10 days of rain during the month.
What temperature can I expect during the day in Sundsvall in August?
The average daily temperature in August in Sundsvall is 20 °C (67 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
Are there good conditions to visit in September in Sundsvall?
Sundsvall can be visited in September - the weather will be moderate. A relatively low temperature of 14 °C (58 °F) may be ideal for walking or outdoor activities, but some people may have a different idea of the holiday. The night temperature of 6 °C (42 °F) is not inviting for evening and night activities except for visiting a bar and having beer or two.
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