Chiavenna climate — normals and trends
Chiavenna (Italy) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 4.3 °C and it receives 1,238 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 (14.3 °C on average) and the coldest is January (-6.3 °C). Rainfall peaks in May.
Chiavenna averages 171 frost days, 0 hot days (≥ 30 °C) and 148 rainy days per year.
Chiavenna has warmed by +3.4 °C between 1940 and 2025, or +0.40 °C per decade. This trend is statistically significant.
The number of frost days there went from about 200 to 142 per year over the period.
The hottest day of the period reached 30.8 °C (on 27 June 2019) and the coldest -28.4 °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
ChiavennaLombardy
- coords
- 46.32°, 9.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
4.3°C
Average daily high
8.5°C
Average daily low
0.1°C
Annual rainfall
1,238mm
Sunshine / day
9.1h
Mean relative humidity
76%
Average peak wind
6.7km/h
Seasonal range
20.6°C
Frost days (< 0 °C)
171 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
148 d/yr
Annual snowfall
275.5 cm
Average feels-like high
6.5 °C
Average feels-like low
-2.8 °C
Average peak gust
39.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.4 °C
since 1940
+0.4 °C per decade · r² = 0.69 · 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
30.8 °C
27 June 2019
Coldest day
-28.4 °C
14 February 1940
Wettest day
105 mm
6 August 1985
Windiest day
15.2 km/h
3 April 1973
Strongest gust
123.1 km/h
29 October 2018
Hottest feels-like
31.1 °C
26 June 2019
Coldest feels-like
-33.7 °C
14 February 1940
Snowiest day
45.2 cm
10 December 1954
Sunniest day
15.0 h
2 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 | 0.9 °C | +3.2 °C | 136 mm | +77 mm |
| Feb | 2.8 °C | +2.7 °C | 28 mm | -30 mm |
| Mar | 5.6 °C | +1.9 °C | 85 mm | +8 mm |
| Apr | 10.9 °C | +3.6 °C | 114 mm | +3 mm |
| May | 13.7 °C | +1.6 °C | 171 mm | +30 mm |
| Jun | 21.0 °C | +4.5 °C | 149 mm | +13 mm |
| Jul | 19.2 °C | +0.2 °C | 146 mm | +29 mm |
| Aug | 20.0 °C | +1.7 °C | 155 mm | +31 mm |
| Sep | 15.1 °C | +0.1 °C | 120 mm | +13 mm |
| Oct | 10.6 °C | +0.7 °C | 55 mm | -65 mm |
| Nov | 5.4 °C | +2.0 °C | 85 mm | -31 mm |
| Dec | 4.3 °C | +5.6 °C | 26 mm | -44 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 Chiavenna?
Chiavenna has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 4.3 °C and it receives 1,238 mm of precipitation per year.
What is the hottest day ever recorded in Chiavenna?
The hottest day measured in Chiavenna between 1940 and 2025 was 27 June 2019, reaching 30.8 °C.
What is the coldest day in Chiavenna?
The coldest day measured in Chiavenna between 1940 and 2025 was 14 February 1940, at -28.4 °C.
Does it snow in Chiavenna?
Yes. Chiavenna gets on average 275.5 cm of snow per year and has around 171 frost days.
Has the climate of Chiavenna warmed?
Yes: Chiavenna warmed by +3.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chiavenna?
The wettest day measured in Chiavenna between 1940 and 2025 was 6 August 1985, with 105 mm of rain in 24 hours.
What was the windiest day in Chiavenna?
The windiest day measured in Chiavenna between 1940 and 2025 was 3 April 1973, with winds reaching 15.2 km/h.
What is the warmest month in Chiavenna?
The warmest month in Chiavenna is July (14.3 °C on average); the coldest is January (-6.3 °C).
How much does it rain in Chiavenna?
Chiavenna receives on average 1,238 mm of precipitation per year, spread over about 148 rainy days.
Is it sunny in Chiavenna?
Chiavenna gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chiavenna?
The heaviest 24-hour snowfall measured in Chiavenna between 1940 and 2025 was 10 December 1954, with 45.2 cm.
Are there tropical nights in Chiavenna?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Chiavenna.
What was the most extreme apparent temperature in Chiavenna?
In Chiavenna, between 1940 and 2025, the highest apparent temperature reached 31.1 °C on 26 June 2019, and the lowest was -33.7 °C on 14 February 1940.
Compare Chiavenna with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chiavenna