Grums climate — normals and trends
Grums (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.5 °C and it receives 724 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 (17.1 °C on average) and the coldest is February (-3.2 °C). Rainfall peaks in August.
Grums averages 110 frost days, 0 hot days (≥ 30 °C) and 127 rainy days per year.
Grums has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 127 to 93 per year over the period.
The hottest day of the period reached 31.0 °C (on 7 August 1975) and the coldest -29.0 °C (on 10 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
GrumsVärmland County
- coords
- 59.35°, 13.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.5°C
Average daily high
9.2°C
Average daily low
3.8°C
Annual rainfall
724mm
Sunshine / day
7.7h
Mean relative humidity
80%
Average peak wind
17.6km/h
Seasonal range
20.3°C
Frost days (< 0 °C)
110 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
127 d/yr
Annual snowfall
107.6 cm
Average feels-like high
6.3 °C
Average feels-like low
0.5 °C
Average peak gust
36.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.26 · 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
31.0 °C
7 August 1975
Coldest day
-29.0 °C
10 February 1985
Wettest day
60 mm
21 June 1990
Windiest day
47.8 km/h
23 February 2024
Strongest gust
101.2 km/h
15 September 1994
Hottest feels-like
32.5 °C
6 August 1975
Coldest feels-like
-34.1 °C
10 January 1987
Snowiest day
24.6 cm
6 November 1971
Sunniest day
18.0 h
20 June 1941
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 | 1.8 °C | +2.9 °C | 103 mm | +52 mm |
| Feb | 1.9 °C | +2.7 °C | 24 mm | -15 mm |
| Mar | 7.0 °C | +4.0 °C | 15 mm | -22 mm |
| Apr | 11.6 °C | +3.6 °C | 51 mm | +7 mm |
| May | 14.3 °C | +0.5 °C | 46 mm | -8 mm |
| Jun | 18.1 °C | -0.1 °C | 80 mm | +10 mm |
| Jul | 22.7 °C | +2.5 °C | 103 mm | +22 mm |
| Aug | 19.2 °C | 0.0 °C | 62 mm | -26 mm |
| Sep | 17.0 °C | +2.0 °C | 89 mm | +17 mm |
| Oct | 10.8 °C | +1.1 °C | 97 mm | +32 mm |
| Nov | 5.8 °C | +1.6 °C | 46 mm | -19 mm |
| Dec | 4.5 °C | +3.6 °C | 57 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 Grums?
Grums has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.5 °C and it receives 724 mm of precipitation per year.
What is the hottest day ever recorded in Grums?
The hottest day measured in Grums between 1940 and 2025 was 7 August 1975, reaching 31.0 °C.
What is the coldest day in Grums?
The coldest day measured in Grums between 1940 and 2025 was 10 February 1985, at -29.0 °C.
Does it snow in Grums?
Yes. Grums gets on average 107.6 cm of snow per year and has around 110 frost days.
Has the climate of Grums warmed?
Yes: Grums warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grums?
The wettest day measured in Grums between 1940 and 2025 was 21 June 1990, with 60 mm of rain in 24 hours.
What was the windiest day in Grums?
The windiest day measured in Grums between 1940 and 2025 was 23 February 2024, with winds reaching 47.8 km/h.
What is the warmest month in Grums?
The warmest month in Grums is July (17.1 °C on average); the coldest is February (-3.2 °C).
How much does it rain in Grums?
Grums receives on average 724 mm of precipitation per year, spread over about 127 rainy days.
Is it sunny in Grums?
Grums gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grums?
The heaviest 24-hour snowfall measured in Grums between 1940 and 2025 was 6 November 1971, with 24.6 cm.
Are there tropical nights in Grums?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Grums.
What was the most extreme apparent temperature in Grums?
In Grums, between 1940 and 2025, the highest apparent temperature reached 32.5 °C on 6 August 1975, and the lowest was -34.1 °C on 10 January 1987.
Compare Grums with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grums