Tornio climate — normals and trends
Tornio (Finland) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 2.0 °C and it receives 655 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 (15.4 °C on average) and the coldest is February (-9.7 °C). Rainfall peaks in August.
Tornio averages 182 frost days, 0 hot days (≥ 30 °C) and 123 rainy days per year.
Tornio has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 192 to 172 per year over the period.
The hottest day of the period reached 28.5 °C (on 19 July 1988) and the coldest -37.1 °C (on 28 January 1999).
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
TornioLapland
- coords
- 65.85°, 24.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.0°C
Average daily high
4.1°C
Average daily low
-0.2°C
Annual rainfall
655mm
Sunshine / day
7.3h
Mean relative humidity
82%
Average peak wind
21.0km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
182 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
163.5 cm
Average feels-like high
0.2 °C
Average feels-like low
-4.5 °C
Average peak gust
34.2 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
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.23 · 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
28.5 °C
19 July 1988
Coldest day
-37.1 °C
28 January 1999
Wettest day
47 mm
6 August 1986
Windiest day
57.8 km/h
22 September 1982
Strongest gust
103.0 km/h
2 November 2020
Hottest feels-like
31.2 °C
31 July 2025
Coldest feels-like
-42.2 °C
28 January 1999
Snowiest day
16.8 cm
24 October 2014
Sunniest day
20.9 h
3 July 2018
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 | -5.7 °C | +1.4 °C | 54 mm | +11 mm |
| Feb | -3.2 °C | +4.3 °C | 50 mm | +13 mm |
| Mar | -0.7 °C | +2.9 °C | 29 mm | -6 mm |
| Apr | 2.4 °C | +0.7 °C | 16 mm | -22 mm |
| May | 8.1 °C | +0.9 °C | 35 mm | -5 mm |
| Jun | 13.8 °C | +0.8 °C | 97 mm | +45 mm |
| Jul | 21.5 °C | +4.0 °C | 50 mm | -13 mm |
| Aug | 17.4 °C | +1.2 °C | 128 mm | +51 mm |
| Sep | 14.1 °C | +2.7 °C | 116 mm | +40 mm |
| Oct | 7.9 °C | +3.1 °C | 100 mm | +32 mm |
| Nov | 0.3 °C | +0.2 °C | 74 mm | +7 mm |
| Dec | -1.3 °C | +2.6 °C | 71 mm | +13 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 Tornio?
Tornio has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 2.0 °C and it receives 655 mm of precipitation per year.
What is the hottest day ever recorded in Tornio?
The hottest day measured in Tornio between 1940 and 2025 was 19 July 1988, reaching 28.5 °C.
What is the coldest day in Tornio?
The coldest day measured in Tornio between 1940 and 2025 was 28 January 1999, at -37.1 °C.
Does it snow in Tornio?
Yes. Tornio gets on average 163.5 cm of snow per year and has around 182 frost days.
Has the climate of Tornio warmed?
Yes: Tornio warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tornio?
The wettest day measured in Tornio between 1940 and 2025 was 6 August 1986, with 47 mm of rain in 24 hours.
What was the windiest day in Tornio?
The windiest day measured in Tornio between 1940 and 2025 was 22 September 1982, with winds reaching 57.8 km/h.
What is the warmest month in Tornio?
The warmest month in Tornio is July (15.4 °C on average); the coldest is February (-9.7 °C).
How much does it rain in Tornio?
Tornio receives on average 655 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Tornio?
Tornio gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tornio?
The heaviest 24-hour snowfall measured in Tornio between 1940 and 2025 was 24 October 2014, with 16.8 cm.
Are there tropical nights in Tornio?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Tornio.
What was the most extreme apparent temperature in Tornio?
In Tornio, between 1940 and 2025, the highest apparent temperature reached 31.2 °C on 31 July 2025, and the lowest was -42.2 °C on 28 January 1999.
Compare Tornio with another city
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Nearby cities
The climate around Tornio