Louny climate — normals and trends
Louny (Czechia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.5 °C and it receives 560 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 (18.3 °C on average) and the coldest is January (-1.4 °C). Rainfall peaks in July.
Louny averages 96 frost days, 7 hot days (≥ 30 °C) and 117 rainy days per year.
Louny has warmed by +2.7 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The number of frost days there went from about 116 to 76 per year over the period.
The hottest day of the period reached 38.7 °C (on 20 August 2012) and the coldest -28.4 °C (on 10 February 1956).
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
LounyÚstí nad Labem Region
- coords
- 50.36°, 13.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.5°C
Average daily high
12.5°C
Average daily low
4.7°C
Annual rainfall
560mm
Sunshine / day
7.6h
Mean relative humidity
76%
Average peak wind
15.8km/h
Seasonal range
19.7°C
Frost days (< 0 °C)
96 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
117 d/yr
Annual snowfall
43.8 cm
Average feels-like high
9.9 °C
Average feels-like low
1.9 °C
Average peak gust
33.3 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.52 · 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
20 August 2012
Coldest day
-28.4 °C
10 February 1956
Wettest day
69 mm
3 August 1983
Windiest day
49.9 km/h
21 October 2021
Strongest gust
123.8 km/h
18 January 2007
Hottest feels-like
39.8 °C
20 August 1943
Coldest feels-like
-33.0 °C
10 February 1956
Snowiest day
18.1 cm
26 November 1969
Sunniest day
16.0 h
9 June 2014
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 4.1 °C | +3.2 °C | 40 mm | +10 mm |
| Feb | 3.3 °C | +0.5 °C | 10 mm | -20 mm |
| Mar | 11.4 °C | +3.9 °C | 19 mm | -17 mm |
| Apr | 16.7 °C | +3.8 °C | 48 mm | +6 mm |
| May | 18.4 °C | +0.7 °C | 42 mm | -22 mm |
| Jun | 26.1 °C | +4.9 °C | 37 mm | -33 mm |
| Jul | 24.6 °C | +1.4 °C | 78 mm | +7 mm |
| Aug | 26.4 °C | +3.2 °C | 29 mm | -36 mm |
| Sep | 20.4 °C | +1.6 °C | 82 mm | +37 mm |
| Oct | 12.5 °C | -0.3 °C | 41 mm | +4 mm |
| Nov | 6.4 °C | +0.3 °C | 35 mm | -2 mm |
| Dec | 4.1 °C | +1.7 °C | 15 mm | -20 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 Louny?
Louny has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.5 °C and it receives 560 mm of precipitation per year.
What is the hottest day ever recorded in Louny?
The hottest day measured in Louny between 1940 and 2025 was 20 August 2012, reaching 38.7 °C.
What is the coldest day in Louny?
The coldest day measured in Louny between 1940 and 2025 was 10 February 1956, at -28.4 °C.
Does it snow in Louny?
Yes. Louny gets on average 43.8 cm of snow per year and has around 96 frost days.
Has the climate of Louny warmed?
Yes: Louny warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Louny?
The wettest day measured in Louny between 1940 and 2025 was 3 August 1983, with 69 mm of rain in 24 hours.
What was the windiest day in Louny?
The windiest day measured in Louny between 1940 and 2025 was 21 October 2021, with winds reaching 49.9 km/h.
What is the warmest month in Louny?
The warmest month in Louny is July (18.3 °C on average); the coldest is January (-1.4 °C).
How much does it rain in Louny?
Louny receives on average 560 mm of precipitation per year, spread over about 117 rainy days.
Is it sunny in Louny?
Louny gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Louny?
The heaviest 24-hour snowfall measured in Louny between 1940 and 2025 was 26 November 1969, with 18.1 cm.
Are there tropical nights in Louny?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Louny.
What was the most extreme apparent temperature in Louny?
In Louny, between 1940 and 2025, the highest apparent temperature reached 39.8 °C on 20 August 1943, and the lowest was -33.0 °C on 10 February 1956.
Compare Louny with another city
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Nearby cities
The climate around Louny