Pärnu climate — normals and trends
Pärnu (Estonia) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.8 °C and it receives 711 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 (17.4 °C on average) and the coldest is February (-5.2 °C). Rainfall peaks in August.
Pärnu averages 135 frost days, 1 hot days (≥ 30 °C) and 138 rainy days per year.
Pärnu 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 157 to 113 per year over the period.
The hottest day of the period reached 33.0 °C (on 21 June 2021) and the coldest -37.9 °C (on 31 December 1978).
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
PärnuPärnumaa
- coords
- 58.39°, 24.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.8°C
Average daily high
9.2°C
Average daily low
2.3°C
Annual rainfall
711mm
Sunshine / day
7.5h
Mean relative humidity
81%
Average peak wind
18.4km/h
Seasonal range
22.6°C
Frost days (< 0 °C)
135 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
102.1 cm
Average feels-like high
6.1 °C
Average feels-like low
-1.1 °C
Average peak gust
37.0 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
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.43 · 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
33.0 °C
21 June 2021
Coldest day
-37.9 °C
31 December 1978
Wettest day
51 mm
1 July 1959
Windiest day
51.8 km/h
17 November 1943
Strongest gust
101.5 km/h
11 January 1991
Hottest feels-like
34.7 °C
8 June 1956
Coldest feels-like
-42.9 °C
31 December 1978
Snowiest day
15.5 cm
20 November 1975
Sunniest day
17.1 h
17 June 1940
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 | 2.5 °C | +5.2 °C | 117 mm | +70 mm |
| Feb | 0.0 °C | +2.6 °C | 14 mm | -23 mm |
| Mar | 7.0 °C | +5.3 °C | 20 mm | -17 mm |
| Apr | 11.2 °C | +2.3 °C | 45 mm | +0 mm |
| May | 14.3 °C | -1.2 °C | 51 mm | -0 mm |
| Jun | 18.2 °C | -1.5 °C | 131 mm | +59 mm |
| Jul | 23.8 °C | +2.3 °C | 136 mm | +43 mm |
| Aug | 19.6 °C | -0.7 °C | 89 mm | -5 mm |
| Sep | 18.5 °C | +3.1 °C | 72 mm | +4 mm |
| Oct | 10.3 °C | +1.0 °C | 50 mm | -10 mm |
| Nov | 5.7 °C | +2.4 °C | 51 mm | -4 mm |
| Dec | 4.2 °C | +4.3 °C | 38 mm | -15 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 Pärnu?
Pärnu has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.8 °C and it receives 711 mm of precipitation per year.
What is the hottest day ever recorded in Pärnu?
The hottest day measured in Pärnu between 1940 and 2025 was 21 June 2021, reaching 33.0 °C.
What is the coldest day in Pärnu?
The coldest day measured in Pärnu between 1940 and 2025 was 31 December 1978, at -37.9 °C.
Does it snow in Pärnu?
Yes. Pärnu gets on average 102.1 cm of snow per year and has around 135 frost days.
Has the climate of Pärnu warmed?
Yes: Pärnu warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pärnu?
The wettest day measured in Pärnu between 1940 and 2025 was 1 July 1959, with 51 mm of rain in 24 hours.
What was the windiest day in Pärnu?
The windiest day measured in Pärnu between 1940 and 2025 was 17 November 1943, with winds reaching 51.8 km/h.
What is the warmest month in Pärnu?
The warmest month in Pärnu is July (17.4 °C on average); the coldest is February (-5.2 °C).
How much does it rain in Pärnu?
Pärnu receives on average 711 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Pärnu?
Pärnu gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Pärnu?
The heaviest 24-hour snowfall measured in Pärnu between 1940 and 2025 was 20 November 1975, with 15.5 cm.
Are there tropical nights in Pärnu?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Pärnu.
What was the most extreme apparent temperature in Pärnu?
In Pärnu, between 1940 and 2025, the highest apparent temperature reached 34.7 °C on 8 June 1956, and the lowest was -42.9 °C on 31 December 1978.
Compare Pärnu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pärnu