Susa climate — normals and trends
Susa (Italy) has a subarctic climate (Dfc) under the Köppen-Geiger classification. Its mean annual temperature is 0.6 °C and it receives 1,317 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 (11.1 °C on average) and the coldest is January (-9.3 °C). Rainfall peaks in May.
Susa averages 225 frost days, 0 hot days (≥ 30 °C) and 170 rainy days per year.
Susa 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 247 to 203 per year over the period.
The hottest day of the period reached 24.2 °C (on 4 July 1950) and the coldest -30.7 °C (on 14 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
SusaPiedmont
- coords
- 45.14°, 7.06°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
0.6°C
Average daily high
4.4°C
Average daily low
-3.1°C
Annual rainfall
1,317mm
Sunshine / day
9.7h
Mean relative humidity
76%
Average peak wind
6.8km/h
Seasonal range
20.4°C
Frost days (< 0 °C)
225 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
170 d/yr
Annual snowfall
514.6 cm
Average feels-like high
2.0 °C
Average feels-like low
-6.4 °C
Average peak gust
40.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.7 °C
since 1940
+0.3 °C per decade · r² = 0.63 · 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
24.2 °C
4 July 1950
Coldest day
-30.7 °C
14 February 1940
Wettest day
111 mm
24 September 1993
Windiest day
19.0 km/h
28 December 1999
Strongest gust
168.5 km/h
27 February 1990
Hottest feels-like
25.7 °C
26 June 2019
Coldest feels-like
-36.5 °C
14 February 1940
Snowiest day
67.7 cm
21 March 1971
Sunniest day
15.0 h
25 May 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 | -2.4 °C | +3.9 °C | 128 mm | +44 mm |
| Feb | -0.6 °C | +3.7 °C | 31 mm | -52 mm |
| Mar | 0.7 °C | +1.6 °C | 106 mm | +10 mm |
| Apr | 5.2 °C | +2.9 °C | 270 mm | +155 mm |
| May | 8.9 °C | +2.1 °C | 100 mm | -35 mm |
| Jun | 17.5 °C | +5.3 °C | 136 mm | +10 mm |
| Jul | 15.8 °C | +0.1 °C | 112 mm | -8 mm |
| Aug | 17.1 °C | +1.8 °C | 111 mm | -19 mm |
| Sep | 11.9 °C | +0.1 °C | 135 mm | +29 mm |
| Oct | 7.1 °C | +0.8 °C | 95 mm | -19 mm |
| Nov | 0.6 °C | +1.4 °C | 66 mm | -49 mm |
| Dec | -1.7 °C | +3.8 °C | 88 mm | -7 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 Susa?
Susa has a subarctic climate (Köppen Dfc). Over 1940-2025, the average annual temperature is 0.6 °C and it receives 1,317 mm of precipitation per year.
What is the hottest day ever recorded in Susa?
The hottest day measured in Susa between 1940 and 2025 was 4 July 1950, reaching 24.2 °C.
What is the coldest day in Susa?
The coldest day measured in Susa between 1940 and 2025 was 14 February 1940, at -30.7 °C.
Does it snow in Susa?
Yes. Susa gets on average 514.6 cm of snow per year and has around 225 frost days.
Has the climate of Susa warmed?
Yes: Susa warmed by +2.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Susa?
The wettest day measured in Susa between 1940 and 2025 was 24 September 1993, with 111 mm of rain in 24 hours.
What was the windiest day in Susa?
The windiest day measured in Susa between 1940 and 2025 was 28 December 1999, with winds reaching 19.0 km/h.
What is the warmest month in Susa?
The warmest month in Susa is July (11.1 °C on average); the coldest is January (-9.3 °C).
How much does it rain in Susa?
Susa receives on average 1,317 mm of precipitation per year, spread over about 170 rainy days.
Is it sunny in Susa?
Susa gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
What is the biggest single-day snowfall in Susa?
The heaviest 24-hour snowfall measured in Susa between 1940 and 2025 was 21 March 1971, with 67.7 cm.
Are there tropical nights in Susa?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Susa.
What was the most extreme apparent temperature in Susa?
In Susa, between 1940 and 2025, the highest apparent temperature reached 25.7 °C on 26 June 2019, and the lowest was -36.5 °C on 14 February 1940.
Compare Susa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Susa