Harstad climate — normals and trends
Harstad (Norway) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 1.8 °C and it receives 1,196 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (12.6 °C on average) and the coldest is January (-7.5 °C). Rainfall peaks in October.
Harstad averages 180 frost days, 0 hot days (≥ 30 °C) and 192 rainy days per year.
Harstad has warmed by +4.4 °C between 1940 and 2025, or +0.52 °C per decade. This trend is statistically significant.
The number of frost days there went from about 215 to 145 per year over the period.
The hottest day of the period reached 30.3 °C (on 3 July 1972) and the coldest -31.1 °C (on 20 December 1963).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
HarstadTroms
- coords
- 68.80°, 16.54°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
1.8°C
Average daily high
4.4°C
Average daily low
-1.0°C
Annual rainfall
1,196mm
Sunshine / day
6.6h
Mean relative humidity
79%
Average peak wind
13.9km/h
Seasonal range
20.1°C
Frost days (< 0 °C)
180 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
192 d/yr
Annual snowfall
320.0 cm
Average feels-like high
1.1 °C
Average feels-like low
-4.6 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
7.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+4.4 °C
since 1940
+0.5 °C per decade · r² = 0.66 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
30.3 °C
3 July 1972
Coldest day
-31.1 °C
20 December 1963
Wettest day
59 mm
22 February 1975
Windiest day
49.4 km/h
12 October 1996
Strongest gust
139.3 km/h
12 October 1996
Hottest feels-like
29.8 °C
2 July 1972
Coldest feels-like
-37.1 °C
20 December 1963
Snowiest day
23.5 cm
3 March 1951
Sunniest day
23.0 h
15 June 2019
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -2.0 °C | +2.9 °C | 185 mm | +82 mm |
| Feb | 1.9 °C | +6.2 °C | 124 mm | +31 mm |
| Mar | 1.4 °C | +2.4 °C | 158 mm | +61 mm |
| Apr | 2.7 °C | -0.2 °C | 148 mm | +64 mm |
| May | 9.3 °C | +1.8 °C | 100 mm | +19 mm |
| Jun | 12.8 °C | +0.4 °C | 123 mm | +30 mm |
| Jul | 18.1 °C | +2.7 °C | 76 mm | -24 mm |
| Aug | 15.9 °C | +1.4 °C | 175 mm | +71 mm |
| Sep | 14.3 °C | +4.0 °C | 102 mm | -13 mm |
| Oct | 7.0 °C | +2.5 °C | 129 mm | +6 mm |
| Nov | 0.1 °C | +0.7 °C | 127 mm | +31 mm |
| Dec | 0.7 °C | +4.1 °C | 153 mm | +46 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Harstad?
Harstad has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 1.8 °C and it receives 1,196 mm of precipitation per year.
What is the hottest day ever recorded in Harstad?
The hottest day measured in Harstad between 1940 and 2025 was 3 July 1972, reaching 30.3 °C.
What is the coldest day in Harstad?
The coldest day measured in Harstad between 1940 and 2025 was 20 December 1963, at -31.1 °C.
Does it snow in Harstad?
Yes. Harstad gets on average 320.0 cm of snow per year and has around 180 frost days.
Has the climate of Harstad warmed?
Yes: Harstad warmed by +4.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Harstad?
The wettest day measured in Harstad between 1940 and 2025 was 22 February 1975, with 59 mm of rain in 24 hours.
What was the windiest day in Harstad?
The windiest day measured in Harstad between 1940 and 2025 was 12 October 1996, with winds reaching 49.4 km/h.
What is the warmest month in Harstad?
The warmest month in Harstad is July (12.6 °C on average); the coldest is January (-7.5 °C).
How much does it rain in Harstad?
Harstad receives on average 1,196 mm of precipitation per year, spread over about 192 rainy days.
Is it sunny in Harstad?
Harstad gets on average 6.6 hours of sunshine per day, roughly 2,409 hours per year over 1940-2025.
What is the biggest single-day snowfall in Harstad?
The heaviest 24-hour snowfall measured in Harstad between 1940 and 2025 was 3 March 1951, with 23.5 cm.
Are there tropical nights in Harstad?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Harstad.
What was the most extreme apparent temperature in Harstad?
In Harstad, between 1940 and 2025, the highest apparent temperature reached 29.8 °C on 2 July 1972, and the lowest was -37.1 °C on 20 December 1963.
Compare Harstad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Harstad