Harstad, Troms, Norway Climate Change Severity

38
Moderate
The current climate change severity in Harstad is Moderate, with a 12.03% 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 Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Harstad 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), Harstad temperature has changed by around +11.4%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
2817
-39.2%
cloudyCloudy
5225
-51.9%
rainyRainy
146117
-19.8%
snowySnowy
1938
100%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 15 years, Harstad 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, Harstad experienced significant changes:

Temperature change of

+0.5 °C

Variation in annual rainfall

+29.4 %

Change in average humidity

+2.4 %

PM2.5 levels surged by

-13.3 %

Heatwave changed by

+5.6 day(s)

Coldwave changed by

-4.8 day(s)

Wind speeds changed by

+1.1 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 Sep.

Harstad Weather Forecast 30 Days (October - November 2025)
Harstad, Troms, Norway

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Thu. 23, Oct.
moderate rainModerate rain
Temperature Icon3°/2°
Humidity Icon97%
Wind Icon10km/h
Fri. 24, Oct.
moderate rainModerate rain
Temperature Icon4°/3°
Humidity Icon90%
Wind Icon21km/h
Sat. 25, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon3°/1°
Humidity Icon71%
Wind Icon27km/h
Sun. 26, Oct.
heavy snowHeavy snow
Temperature Icon1°/0°
Humidity Icon93%
Wind Icon14km/h
Mon. 27, Oct.
moderate rainModerate rain
Temperature Icon2°/1°
Humidity Icon99%
Wind Icon9km/h
Tue. 28, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon4°/1°
Humidity Icon86%
Wind Icon27km/h
Wed. 29, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon2°/0°
Humidity Icon93%
Wind Icon15km/h
Thu. 30, Oct.
cloudyCloudy
Temperature Icon0°/-2°
Humidity Icon79%
Wind Icon10km/h
Fri. 31, Oct.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon0°/-2°
Humidity Icon83%
Wind Icon18km/h
Sat. 1, Nov.
moderate rainModerate rain
Temperature Icon5°/2°
Humidity Icon96%
Wind Icon11km/h
Sun. 2, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-3°
Humidity Icon89%
Wind Icon35km/h
Mon. 3, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon-2°/-3°
Humidity Icon74%
Wind Icon26km/h
Tue. 4, Nov.
blizzardBlizzard
Temperature Icon1°/-1°
Humidity Icon77%
Wind Icon44km/h
Wed. 5, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon3°/0°
Humidity Icon78%
Wind Icon40km/h
Thu. 6, Nov.
patchy moderate snowPatchy moderate snow
Temperature Icon0°/-3°
Humidity Icon85%
Wind Icon14km/h
Fri. 7, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon3°/0°
Humidity Icon77%
Wind Icon18km/h
Sat. 8, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-1°
Humidity Icon78%
Wind Icon17km/h
Sun. 9, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-1°
Humidity Icon75%
Wind Icon19km/h
Mon. 10, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-1°
Humidity Icon75%
Wind Icon16km/h
Wed. 12, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon3°/-1°
Humidity Icon78%
Wind Icon17km/h
Thu. 13, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/0°
Humidity Icon79%
Wind Icon19km/h
Fri. 14, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-1°
Humidity Icon77%
Wind Icon19km/h
Sat. 15, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon4°/0°
Humidity Icon82%
Wind Icon21km/h
Sun. 16, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon4°/1°
Humidity Icon78%
Wind Icon21km/h
Mon. 17, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon3°/0°
Humidity Icon75%
Wind Icon19km/h
Tue. 18, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon3°/0°
Humidity Icon78%
Wind Icon18km/h
Wed. 19, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-2°
Humidity Icon76%
Wind Icon18km/h
Thu. 20, Nov.
moderate snowModerate snow
Temperature Icon1°/-2°
Humidity Icon73%
Wind Icon17km/h
Fri. 21, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon1°/-2°
Humidity Icon76%
Wind Icon20km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 1, Nov.

5°C

Low will be onMon. 3, Nov.

-3.3°C

HumidityHumidity

High will be onMon. 27, Oct.

99%

Low will be onSat. 25, Oct.

71%

Wind SpeedWind Speed

High will be onTue. 4, Nov.

43.6km/h

Low will be onMon. 27, Oct.

9km/h

PrecipitationPrecipitation

High will be onMon. 27, Oct.

14.3mm

Low will be onThu. 30, Oct.

0.04mm

Ultraviolet IndexUV

High will be onTue. 28, Oct.

1

Low will be onTue. 28, Oct.

1

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