Grimstad climate — normals and trends
Grimstad (Norway) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.9 °C and it receives 1,044 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 (16.7 °C on average) and the coldest is February (-0.1 °C). Rainfall peaks in November.
Grimstad averages 73 frost days, 0 hot days (≥ 30 °C) and 142 rainy days per year.
Grimstad has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The number of frost days there went from about 95 to 51 per year over the period.
The hottest day of the period reached 32.2 °C (on 11 August 1975) and the coldest -19.1 °C (on 26 January 1942).
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
GrimstadAgder
- coords
- 58.34°, 8.59°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.9°C
Average daily high
10.3°C
Average daily low
5.4°C
Annual rainfall
1,044mm
Sunshine / day
8.2h
Mean relative humidity
78%
Average peak wind
23.8km/h
Seasonal range
16.8°C
Frost days (< 0 °C)
73 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
129.7 cm
Average feels-like high
6.9 °C
Average feels-like low
1.4 °C
Average peak gust
44.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.39 · 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
32.2 °C
11 August 1975
Coldest day
-19.1 °C
26 January 1942
Wettest day
72 mm
18 July 2009
Windiest day
60.7 km/h
16 October 1987
Strongest gust
122.4 km/h
15 September 1994
Hottest feels-like
31.3 °C
15 July 2021
Coldest feels-like
-27.9 °C
26 January 1942
Snowiest day
33.5 cm
6 January 2025
Sunniest day
17.1 h
21 June 2022
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 | 2.9 °C | +0.9 °C | 158 mm | +59 mm |
| Feb | 2.8 °C | +0.8 °C | 61 mm | -14 mm |
| Mar | 7.7 °C | +3.2 °C | 30 mm | -40 mm |
| Apr | 12.4 °C | +3.7 °C | 36 mm | -21 mm |
| May | 15.3 °C | +1.7 °C | 37 mm | -28 mm |
| Jun | 18.3 °C | +0.7 °C | 46 mm | -18 mm |
| Jul | 22.9 °C | +3.2 °C | 75 mm | -1 mm |
| Aug | 19.6 °C | +0.6 °C | 97 mm | -4 mm |
| Sep | 16.5 °C | +1.1 °C | 174 mm | +71 mm |
| Oct | 12.8 °C | +1.8 °C | 147 mm | +33 mm |
| Nov | 7.9 °C | +1.4 °C | 126 mm | +8 mm |
| Dec | 6.7 °C | +3.0 °C | 132 mm | +30 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 Grimstad?
Grimstad has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.9 °C and it receives 1,044 mm of precipitation per year.
What is the hottest day ever recorded in Grimstad?
The hottest day measured in Grimstad between 1940 and 2025 was 11 August 1975, reaching 32.2 °C.
What is the coldest day in Grimstad?
The coldest day measured in Grimstad between 1940 and 2025 was 26 January 1942, at -19.1 °C.
Does it snow in Grimstad?
Yes. Grimstad gets on average 129.7 cm of snow per year and has around 73 frost days.
Has the climate of Grimstad warmed?
Yes: Grimstad warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grimstad?
The wettest day measured in Grimstad between 1940 and 2025 was 18 July 2009, with 72 mm of rain in 24 hours.
What was the windiest day in Grimstad?
The windiest day measured in Grimstad between 1940 and 2025 was 16 October 1987, with winds reaching 60.7 km/h.
What is the warmest month in Grimstad?
The warmest month in Grimstad is July (16.7 °C on average); the coldest is February (-0.1 °C).
How much does it rain in Grimstad?
Grimstad receives on average 1,044 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Grimstad?
Grimstad gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grimstad?
The heaviest 24-hour snowfall measured in Grimstad between 1940 and 2025 was 6 January 2025, with 33.5 cm.
Are there tropical nights in Grimstad?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Grimstad.
What was the most extreme apparent temperature in Grimstad?
In Grimstad, between 1940 and 2025, the highest apparent temperature reached 31.3 °C on 15 July 2021, and the lowest was -27.9 °C on 26 January 1942.
Compare Grimstad with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grimstad