Sumirago climate — normals and trends
Sumirago (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.4 °C and it receives 1,461 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 (22.5 °C on average) and the coldest is January (2.5 °C). Rainfall peaks in October.
Sumirago averages 42 frost days, 13 hot days (≥ 30 °C) and 122 rainy days per year.
Sumirago has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 70 to 14 per year over the period.
The hottest day of the period reached 37.7 °C (on 11 August 2003) and the coldest -13.3 °C (on 9 January 1945).
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
SumiragoLombardy
- coords
- 45.74°, 8.78°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.4°C
Average daily high
16.4°C
Average daily low
8.8°C
Annual rainfall
1,461mm
Sunshine / day
8.9h
Mean relative humidity
74%
Average peak wind
8.7km/h
Seasonal range
20.0°C
Frost days (< 0 °C)
42 d/yr
Hot days (≥ 30 °C)
13 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
36.2 cm
Average feels-like high
15.7 °C
Average feels-like low
7.4 °C
Average peak gust
22.1 km/h
Tropical nights (≥ 20 °C)
16 d/yr
Solar radiation
13.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.73 · 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
37.7 °C
11 August 2003
Coldest day
-13.3 °C
9 January 1945
Wettest day
121 mm
29 September 1991
Windiest day
37.7 km/h
12 March 2006
Strongest gust
84.6 km/h
12 March 2006
Hottest feels-like
41.4 °C
27 June 2019
Coldest feels-like
-18.4 °C
14 February 1940
Snowiest day
27.4 cm
28 January 1978
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 | 7.8 °C | +2.0 °C | 118 mm | +53 mm |
| Feb | 9.3 °C | +1.3 °C | 55 mm | -18 mm |
| Mar | 14.3 °C | +1.9 °C | 134 mm | +34 mm |
| Apr | 18.6 °C | +2.3 °C | 215 mm | +76 mm |
| May | 21.8 °C | +1.4 °C | 202 mm | +43 mm |
| Jun | 29.2 °C | +4.8 °C | 104 mm | -35 mm |
| Jul | 28.5 °C | +1.4 °C | 171 mm | +65 mm |
| Aug | 28.4 °C | +2.1 °C | 245 mm | +109 mm |
| Sep | 22.7 °C | +0.6 °C | 205 mm | +59 mm |
| Oct | 17.4 °C | +1.0 °C | 60 mm | -115 mm |
| Nov | 12.1 °C | +1.5 °C | 66 mm | -84 mm |
| Dec | 9.8 °C | +3.1 °C | 58 mm | -18 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 Sumirago?
Sumirago has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.4 °C and it receives 1,461 mm of precipitation per year.
What is the hottest day ever recorded in Sumirago?
The hottest day measured in Sumirago between 1940 and 2025 was 11 August 2003, reaching 37.7 °C.
What is the coldest day in Sumirago?
The coldest day measured in Sumirago between 1940 and 2025 was 9 January 1945, at -13.3 °C.
Does it snow in Sumirago?
Yes. Sumirago gets on average 36.2 cm of snow per year and has around 42 frost days.
Has the climate of Sumirago warmed?
Yes: Sumirago warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sumirago?
The wettest day measured in Sumirago between 1940 and 2025 was 29 September 1991, with 121 mm of rain in 24 hours.
What was the windiest day in Sumirago?
The windiest day measured in Sumirago between 1940 and 2025 was 12 March 2006, with winds reaching 37.7 km/h.
What is the warmest month in Sumirago?
The warmest month in Sumirago is July (22.5 °C on average); the coldest is January (2.5 °C).
How much does it rain in Sumirago?
Sumirago receives on average 1,461 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Sumirago?
Sumirago gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sumirago?
The heaviest 24-hour snowfall measured in Sumirago between 1940 and 2025 was 28 January 1978, with 27.4 cm.
Are there tropical nights in Sumirago?
Yes: Sumirago has on average 16 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sumirago?
In Sumirago, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 27 June 2019, and the lowest was -18.4 °C on 14 February 1940.
Compare Sumirago with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sumirago