Črnomelj climate — normals and trends
Črnomelj (Slovenia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.0 °C and it receives 1,159 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 (20.0 °C on average) and the coldest is January (-0.4 °C). Rainfall peaks in November.
Črnomelj averages 84 frost days, 11 hot days (≥ 30 °C) and 143 rainy days per year.
Črnomelj has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 103 to 65 per year over the period.
The hottest day of the period reached 38.7 °C (on 4 August 2017) and the coldest -29.9 °C (on 15 February 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
ČrnomeljMunicipality of Črnomelj
- coords
- 45.57°, 15.19°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.0°C
Average daily high
14.6°C
Average daily low
5.9°C
Annual rainfall
1,159mm
Sunshine / day
8.2h
Mean relative humidity
79%
Average peak wind
10.4km/h
Seasonal range
20.4°C
Frost days (< 0 °C)
84 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
138.2 cm
Average feels-like high
13.4 °C
Average feels-like low
4.1 °C
Average peak gust
29.1 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.61 · 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
38.7 °C
4 August 2017
Coldest day
-29.9 °C
15 February 1940
Wettest day
68 mm
19 September 2017
Windiest day
33.4 km/h
10 February 1984
Strongest gust
91.8 km/h
10 February 1984
Hottest feels-like
40.4 °C
4 August 2017
Coldest feels-like
-34.5 °C
15 February 1940
Snowiest day
32.4 cm
19 November 1999
Sunniest day
14.8 h
22 June 2025
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 | 7.2 °C | +4.3 °C | 71 mm | -3 mm |
| Feb | 5.8 °C | +0.5 °C | 83 mm | +4 mm |
| Mar | 13.2 °C | +3.2 °C | 163 mm | +79 mm |
| Apr | 17.5 °C | +2.6 °C | 94 mm | -5 mm |
| May | 19.3 °C | 0.0 °C | 132 mm | +23 mm |
| Jun | 28.3 °C | +5.2 °C | 12 mm | -99 mm |
| Jul | 27.3 °C | +1.9 °C | 171 mm | +69 mm |
| Aug | 26.3 °C | +1.2 °C | 65 mm | -29 mm |
| Sep | 22.4 °C | +1.6 °C | 92 mm | -9 mm |
| Oct | 15.8 °C | +0.6 °C | 111 mm | +13 mm |
| Nov | 10.5 °C | +1.6 °C | 124 mm | +10 mm |
| Dec | 5.6 °C | +1.4 °C | 60 mm | -35 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 Črnomelj?
Črnomelj has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 10.0 °C and it receives 1,159 mm of precipitation per year.
What is the hottest day ever recorded in Črnomelj?
The hottest day measured in Črnomelj between 1940 and 2025 was 4 August 2017, reaching 38.7 °C.
What is the coldest day in Črnomelj?
The coldest day measured in Črnomelj between 1940 and 2025 was 15 February 1940, at -29.9 °C.
Does it snow in Črnomelj?
Yes. Črnomelj gets on average 138.2 cm of snow per year and has around 84 frost days.
Has the climate of Črnomelj warmed?
Yes: Črnomelj warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Črnomelj?
The wettest day measured in Črnomelj between 1940 and 2025 was 19 September 2017, with 68 mm of rain in 24 hours.
What was the windiest day in Črnomelj?
The windiest day measured in Črnomelj between 1940 and 2025 was 10 February 1984, with winds reaching 33.4 km/h.
What is the warmest month in Črnomelj?
The warmest month in Črnomelj is July (20.0 °C on average); the coldest is January (-0.4 °C).
How much does it rain in Črnomelj?
Črnomelj receives on average 1,159 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Črnomelj?
Črnomelj 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 Črnomelj?
The heaviest 24-hour snowfall measured in Črnomelj between 1940 and 2025 was 19 November 1999, with 32.4 cm.
Are there tropical nights in Črnomelj?
Yes: Črnomelj has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Črnomelj?
In Črnomelj, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 4 August 2017, and the lowest was -34.5 °C on 15 February 1940.
Compare Črnomelj with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Črnomelj