Slovenj Gradec climate — normals and trends
Slovenj Gradec (Slovenia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.4 °C and it receives 1,211 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 (17.5 °C on average) and the coldest is January (-3.6 °C). Rainfall peaks in July.
Slovenj Gradec averages 126 frost days, 1 hot days (≥ 30 °C) and 146 rainy days per year.
Slovenj Gradec has warmed by +2.6 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 145 to 107 per year over the period.
The hottest day of the period reached 33.6 °C (on 8 August 2013) and the coldest -30.8 °C (on 20 January 1940).
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
Slovenj GradecUrban Municipality of Slovenj Gradec
- coords
- 46.51°, 15.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.4°C
Average daily high
11.5°C
Average daily low
3.4°C
Annual rainfall
1,211mm
Sunshine / day
8.3h
Mean relative humidity
80%
Average peak wind
9.4km/h
Seasonal range
21.1°C
Frost days (< 0 °C)
126 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
146 d/yr
Annual snowfall
135.2 cm
Average feels-like high
9.9 °C
Average feels-like low
1.2 °C
Average peak gust
31.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.57 · 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
33.6 °C
8 August 2013
Coldest day
-30.8 °C
20 January 1940
Wettest day
81 mm
25 July 2023
Windiest day
27.9 km/h
14 March 1967
Strongest gust
99.0 km/h
20 October 2023
Hottest feels-like
37.5 °C
27 June 2019
Coldest feels-like
-35.4 °C
20 January 1940
Snowiest day
31.9 cm
14 February 1973
Sunniest day
15.1 h
19 June 2017
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 | 2.7 °C | +2.9 °C | 45 mm | +0 mm |
| Feb | 2.2 °C | -0.1 °C | 45 mm | -7 mm |
| Mar | 9.0 °C | +2.1 °C | 140 mm | +70 mm |
| Apr | 14.8 °C | +2.8 °C | 93 mm | -11 mm |
| May | 16.8 °C | +0.1 °C | 123 mm | -13 mm |
| Jun | 25.7 °C | +5.4 °C | 49 mm | -108 mm |
| Jul | 23.5 °C | +1.4 °C | 160 mm | -0 mm |
| Aug | 23.6 °C | +1.9 °C | 108 mm | -28 mm |
| Sep | 19.3 °C | +1.5 °C | 191 mm | +79 mm |
| Oct | 12.4 °C | +0.1 °C | 70 mm | -17 mm |
| Nov | 6.8 °C | +1.1 °C | 97 mm | +9 mm |
| Dec | 2.7 °C | +1.8 °C | 29 mm | -33 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 Slovenj Gradec?
Slovenj Gradec has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.4 °C and it receives 1,211 mm of precipitation per year.
What is the hottest day ever recorded in Slovenj Gradec?
The hottest day measured in Slovenj Gradec between 1940 and 2025 was 8 August 2013, reaching 33.6 °C.
What is the coldest day in Slovenj Gradec?
The coldest day measured in Slovenj Gradec between 1940 and 2025 was 20 January 1940, at -30.8 °C.
Does it snow in Slovenj Gradec?
Yes. Slovenj Gradec gets on average 135.2 cm of snow per year and has around 126 frost days.
Has the climate of Slovenj Gradec warmed?
Yes: Slovenj Gradec warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Slovenj Gradec?
The wettest day measured in Slovenj Gradec between 1940 and 2025 was 25 July 2023, with 81 mm of rain in 24 hours.
What was the windiest day in Slovenj Gradec?
The windiest day measured in Slovenj Gradec between 1940 and 2025 was 14 March 1967, with winds reaching 27.9 km/h.
What is the warmest month in Slovenj Gradec?
The warmest month in Slovenj Gradec is July (17.5 °C on average); the coldest is January (-3.6 °C).
How much does it rain in Slovenj Gradec?
Slovenj Gradec receives on average 1,211 mm of precipitation per year, spread over about 146 rainy days.
Is it sunny in Slovenj Gradec?
Slovenj Gradec gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in Slovenj Gradec?
The heaviest 24-hour snowfall measured in Slovenj Gradec between 1940 and 2025 was 14 February 1973, with 31.9 cm.
Are there tropical nights in Slovenj Gradec?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Slovenj Gradec.
What was the most extreme apparent temperature in Slovenj Gradec?
In Slovenj Gradec, between 1940 and 2025, the highest apparent temperature reached 37.5 °C on 27 June 2019, and the lowest was -35.4 °C on 20 January 1940.
Compare Slovenj Gradec with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Slovenj Gradec