Hollola climate — normals and trends
Hollola (Finland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.4 °C and it receives 641 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 (17.0 °C on average) and the coldest is January (-7.3 °C). Rainfall peaks in July.
Hollola averages 159 frost days, 0 hot days (≥ 30 °C) and 132 rainy days per year.
Hollola has warmed by +2.4 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 177 to 141 per year over the period.
The hottest day of the period reached 32.8 °C (on 28 July 2010) and the coldest -37.7 °C (on 10 January 1987).
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
HollolaPaijat-Hame
- coords
- 61.05°, 25.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.4°C
Average daily high
7.6°C
Average daily low
1.0°C
Annual rainfall
641mm
Sunshine / day
7.0h
Mean relative humidity
81%
Average peak wind
15.9km/h
Seasonal range
24.3°C
Frost days (< 0 °C)
159 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
135.8 cm
Average feels-like high
4.4 °C
Average feels-like low
-2.4 °C
Average peak gust
35.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.36 · 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
32.8 °C
28 July 2010
Coldest day
-37.7 °C
10 January 1987
Wettest day
86 mm
12 August 1972
Windiest day
39.9 km/h
11 November 1983
Strongest gust
92.5 km/h
10 February 2020
Hottest feels-like
33.5 °C
28 July 2010
Coldest feels-like
-43.7 °C
10 January 1987
Snowiest day
15.8 cm
20 December 1970
Sunniest day
18.3 h
16 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 | 0.0 °C | +4.9 °C | 55 mm | +13 mm |
| Feb | -2.0 °C | +2.6 °C | 16 mm | -18 mm |
| Mar | 4.9 °C | +4.6 °C | 24 mm | -11 mm |
| Apr | 9.5 °C | +2.7 °C | 42 mm | +3 mm |
| May | 13.1 °C | -1.2 °C | 40 mm | -7 mm |
| Jun | 17.6 °C | -1.3 °C | 126 mm | +61 mm |
| Jul | 24.4 °C | +3.5 °C | 87 mm | +6 mm |
| Aug | 19.0 °C | -0.2 °C | 100 mm | +20 mm |
| Sep | 17.0 °C | +3.3 °C | 71 mm | +10 mm |
| Oct | 8.6 °C | +1.4 °C | 55 mm | 0 mm |
| Nov | 4.8 °C | +3.4 °C | 37 mm | -16 mm |
| Dec | 2.5 °C | +4.8 °C | 54 mm | +5 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 Hollola?
Hollola has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.4 °C and it receives 641 mm of precipitation per year.
What is the hottest day ever recorded in Hollola?
The hottest day measured in Hollola between 1940 and 2025 was 28 July 2010, reaching 32.8 °C.
What is the coldest day in Hollola?
The coldest day measured in Hollola between 1940 and 2025 was 10 January 1987, at -37.7 °C.
Does it snow in Hollola?
Yes. Hollola gets on average 135.8 cm of snow per year and has around 159 frost days.
Has the climate of Hollola warmed?
Yes: Hollola warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hollola?
The wettest day measured in Hollola between 1940 and 2025 was 12 August 1972, with 86 mm of rain in 24 hours.
What was the windiest day in Hollola?
The windiest day measured in Hollola between 1940 and 2025 was 11 November 1983, with winds reaching 39.9 km/h.
What is the warmest month in Hollola?
The warmest month in Hollola is July (17.0 °C on average); the coldest is January (-7.3 °C).
How much does it rain in Hollola?
Hollola receives on average 641 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Hollola?
Hollola gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hollola?
The heaviest 24-hour snowfall measured in Hollola between 1940 and 2025 was 20 December 1970, with 15.8 cm.
Are there tropical nights in Hollola?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Hollola.
What was the most extreme apparent temperature in Hollola?
In Hollola, between 1940 and 2025, the highest apparent temperature reached 33.5 °C on 28 July 2010, and the lowest was -43.7 °C on 10 January 1987.
Compare Hollola with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hollola