Brønnøysund climate — normals and trends
Brønnøysund (Norway) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 4.3 °C and it receives 1,863 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 (13.1 °C on average) and the coldest is January (-3.3 °C). Rainfall peaks in October.
Brønnøysund averages 126 frost days, 0 hot days (≥ 30 °C) and 209 rainy days per year.
Brønnøysund has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 155 to 97 per year over the period.
The hottest day of the period reached 28.4 °C (on 22 July 2025) and the coldest -24.2 °C (on 8 February 1985).
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
BrønnøysundNordland
- coords
- 65.47°, 12.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.3°C
Average daily high
6.3°C
Average daily low
2.1°C
Annual rainfall
1,863mm
Sunshine / day
6.8h
Mean relative humidity
80%
Average peak wind
21.0km/h
Seasonal range
16.4°C
Frost days (< 0 °C)
126 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
209 d/yr
Annual snowfall
308.0 cm
Average feels-like high
2.6 °C
Average feels-like low
-2.1 °C
Average peak gust
42.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
8.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.55 · 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
28.4 °C
22 July 2025
Coldest day
-24.2 °C
8 February 1985
Wettest day
90 mm
10 August 2022
Windiest day
69.9 km/h
14 January 1982
Strongest gust
164.2 km/h
14 January 1982
Hottest feels-like
30.1 °C
27 July 2019
Coldest feels-like
-30.4 °C
8 February 1985
Snowiest day
21.6 cm
26 November 1955
Sunniest day
21.0 h
19 June 2004
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 | 1.3 °C | +2.7 °C | 306 mm | +131 mm |
| Feb | 2.8 °C | +4.1 °C | 113 mm | -40 mm |
| Mar | 4.6 °C | +3.4 °C | 289 mm | +128 mm |
| Apr | 6.8 °C | +2.3 °C | 199 mm | +75 mm |
| May | 8.9 °C | +0.2 °C | 117 mm | +19 mm |
| Jun | 13.5 °C | +0.8 °C | 207 mm | +92 mm |
| Jul | 20.5 °C | +5.2 °C | 52 mm | -65 mm |
| Aug | 16.0 °C | +1.1 °C | 244 mm | +100 mm |
| Sep | 15.3 °C | +3.7 °C | 134 mm | -67 mm |
| Oct | 8.6 °C | +1.8 °C | 275 mm | +57 mm |
| Nov | 2.9 °C | +0.7 °C | 230 mm | +63 mm |
| Dec | 3.7 °C | +3.7 °C | 191 mm | -1 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 Brønnøysund?
Brønnøysund has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 4.3 °C and it receives 1,863 mm of precipitation per year.
What is the hottest day ever recorded in Brønnøysund?
The hottest day measured in Brønnøysund between 1940 and 2025 was 22 July 2025, reaching 28.4 °C.
What is the coldest day in Brønnøysund?
The coldest day measured in Brønnøysund between 1940 and 2025 was 8 February 1985, at -24.2 °C.
Does it snow in Brønnøysund?
Yes. Brønnøysund gets on average 308.0 cm of snow per year and has around 126 frost days.
Has the climate of Brønnøysund warmed?
Yes: Brønnøysund warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Brønnøysund?
The wettest day measured in Brønnøysund between 1940 and 2025 was 10 August 2022, with 90 mm of rain in 24 hours.
What was the windiest day in Brønnøysund?
The windiest day measured in Brønnøysund between 1940 and 2025 was 14 January 1982, with winds reaching 69.9 km/h.
What is the warmest month in Brønnøysund?
The warmest month in Brønnøysund is July (13.1 °C on average); the coldest is January (-3.3 °C).
How much does it rain in Brønnøysund?
Brønnøysund receives on average 1,863 mm of precipitation per year, spread over about 209 rainy days.
Is it sunny in Brønnøysund?
Brønnøysund gets on average 6.8 hours of sunshine per day, roughly 2,482 hours per year over 1940-2025.
What is the biggest single-day snowfall in Brønnøysund?
The heaviest 24-hour snowfall measured in Brønnøysund between 1940 and 2025 was 26 November 1955, with 21.6 cm.
Are there tropical nights in Brønnøysund?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Brønnøysund.
What was the most extreme apparent temperature in Brønnøysund?
In Brønnøysund, between 1940 and 2025, the highest apparent temperature reached 30.1 °C on 27 July 2019, and the lowest was -30.4 °C on 8 February 1985.
Compare Brønnøysund with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Brønnøysund