Sundsvall, Vasternorrland, Sweden Climate Change Severity

38
Moderate
The current climate change severity in Sundsvall is Moderate, with a -12.4% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Jul. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Sundsvall Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Sundsvall temperature has changed by around +15.4%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
2420
-16.6%
cloudyCloudy
5240
-23.07%
rainyRainy
8260
-26.8%
snowySnowy
138
-38.4%
mistyMisty
02
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, Sundsvall has experienced measurable improvements in key climate parameters, contributing to the current severity score of 38 (within the Moderate severity category). This suggests improving climate conditions compared to previous years. Here’s a breakdown of the specific changes observed:

Severity Score

38/100

Moderate

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Sundsvall experienced significant changes:

Temperature change of

+0.7 °C

Variation in annual rainfall

-3.5 %

Change in average humidity

-3.08 %

PM2.5 levels surged by

-23.6 %

Heatwave changed by

+6.1 day(s)

Coldwave changed by

-6.1 day(s)

Wind speeds changed by

+1.2 km/h

These indicators show reduced climate volatility, offering a valuable window to reinforce sustainable practices and strengthen long-term climate resilience. As the severity shifts toward Moderate, it is important to maintain momentum in climate adaptation efforts.

Check how we calculate Climate Change Severity
Based on data from Jan. to Jul.

Sundsvall Weather Forecast 30 Days (August - September 2025)
Sundsvall, Vasternorrland, Sweden

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Tue. 5, Aug.
moderate rainModerate rain
Temperature Icon19°/13°
Humidity Icon82%
Wind Icon21km/h
Wed. 6, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon17°/10°
Humidity Icon75%
Wind Icon19km/h
Thu. 7, Aug.
partly cloudyPartly Cloudy
Temperature Icon18°/8°
Humidity Icon72%
Wind Icon15km/h
Fri. 8, Aug.
partly cloudyPartly Cloudy
Temperature Icon21°/9°
Humidity Icon69%
Wind Icon9km/h
Sat. 9, Aug.
sunnySunny
Temperature Icon20°/10°
Humidity Icon72%
Wind Icon12km/h
Sun. 10, Aug.
partly cloudyPartly Cloudy
Temperature Icon21°/12°
Humidity Icon77%
Wind Icon14km/h
Mon. 11, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon18°/13°
Humidity Icon95%
Wind Icon7km/h
Tue. 12, Aug.
moderate rainModerate rain
Temperature Icon20°/11°
Humidity Icon84%
Wind Icon13km/h
Wed. 13, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon20°/12°
Humidity Icon62%
Wind Icon24km/h
Thu. 14, Aug.
sunnySunny
Temperature Icon22°/11°
Humidity Icon58%
Wind Icon14km/h
Fri. 15, Aug.
partly cloudyPartly Cloudy
Temperature Icon23°/12°
Humidity Icon61%
Wind Icon9km/h
Sat. 16, Aug.
partly cloudyPartly Cloudy
Temperature Icon20°/13°
Humidity Icon72%
Wind Icon13km/h
Sun. 17, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon17°/11°
Humidity Icon77%
Wind Icon13km/h
Mon. 18, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon18°/12°
Humidity Icon76%
Wind Icon18km/h
Tue. 19, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/11°
Humidity Icon75%
Wind Icon16km/h
Wed. 20, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/11°
Humidity Icon75%
Wind Icon15km/h
Thu. 21, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/12°
Humidity Icon77%
Wind Icon14km/h
Fri. 22, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/11°
Humidity Icon77%
Wind Icon14km/h
Sat. 23, Aug.
heavy rain at timesHeavy rain at times
Temperature Icon18°/11°
Humidity Icon72%
Wind Icon12km/h
Sun. 24, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon76%
Wind Icon13km/h
Mon. 25, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/10°
Humidity Icon76%
Wind Icon15km/h
Tue. 26, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/11°
Humidity Icon78%
Wind Icon16km/h
Wed. 27, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon76%
Wind Icon18km/h
Thu. 28, Aug.
moderate rain at timesModerate rain at times
Temperature Icon17°/10°
Humidity Icon74%
Wind Icon15km/h
Fri. 29, Aug.
moderate rain at timesModerate rain at times
Temperature Icon17°/10°
Humidity Icon78%
Wind Icon13km/h
Sat. 30, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon78%
Wind Icon12km/h
Sun. 31, Aug.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/10°
Humidity Icon75%
Wind Icon14km/h
Mon. 1, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon76%
Wind Icon15km/h
Tue. 2, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon16°/9°
Humidity Icon75%
Wind Icon14km/h
Wed. 3, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon16°/9°
Humidity Icon74%
Wind Icon14km/h
Thu. 4, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon16°/9°
Humidity Icon75%
Wind Icon15km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 15, Aug.

22.9°C

Low will be onThu. 7, Aug.

8.3°C

HumidityHumidity

High will be onMon. 11, Aug.

95%

Low will be onThu. 14, Aug.

58%

Wind SpeedWind Speed

High will be onWed. 13, Aug.

23.8km/h

Low will be onMon. 11, Aug.

6.5km/h

PrecipitationPrecipitation

High will be onTue. 5, Aug.

7.5mm

Low will be onSun. 10, Aug.

0.02mm

Ultraviolet IndexUV

High will be onSun. 10, Aug.

5

Low will be onWed. 6, Aug.

0.3

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