Grassobbio climate — normals and trends
Grassobbio (Italy) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.6 °C and it receives 1,365 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 (19.6 °C on average) and the coldest is January (-0.9 °C). Rainfall peaks in May.
Grassobbio averages 98 frost days, 2 hot days (≥ 30 °C) and 159 rainy days per year.
Grassobbio has warmed by +3.3 °C between 1940 and 2025, or +0.38 °C per decade. This trend is statistically significant.
The number of frost days there went from about 127 to 69 per year over the period.
The hottest day of the period reached 33.5 °C (on 27 June 2019) and the coldest -24.2 °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
GrassobbioLombardy
- coords
- 45.66°, 9.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.6°C
Average daily high
13.9°C
Average daily low
5.5°C
Annual rainfall
1,365mm
Sunshine / day
9.2h
Mean relative humidity
76%
Average peak wind
8.4km/h
Seasonal range
20.5°C
Frost days (< 0 °C)
98 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
159 d/yr
Annual snowfall
84.7 cm
Average feels-like high
13.0 °C
Average feels-like low
3.5 °C
Average peak gust
24.0 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
13.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.3 °C
since 1940
+0.4 °C per decade · r² = 0.72 · 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
33.5 °C
27 June 2019
Coldest day
-24.2 °C
14 February 1940
Wettest day
94 mm
5 September 1960
Windiest day
26.6 km/h
5 June 1994
Strongest gust
85.7 km/h
5 April 1989
Hottest feels-like
38.6 °C
27 June 2019
Coldest feels-like
-29.8 °C
14 February 1940
Snowiest day
31.4 cm
17 February 1967
Sunniest day
15.0 h
3 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 | 6.1 °C | +2.6 °C | 137 mm | +78 mm |
| Feb | 7.5 °C | +1.9 °C | 44 mm | -21 mm |
| Mar | 12.3 °C | +2.6 °C | 131 mm | +43 mm |
| Apr | 16.4 °C | +2.9 °C | 117 mm | -7 mm |
| May | 19.4 °C | +1.5 °C | 217 mm | +63 mm |
| Jun | 27.3 °C | +5.5 °C | 107 mm | -43 mm |
| Jul | 25.9 °C | +1.8 °C | 211 mm | +72 mm |
| Aug | 25.7 °C | +2.1 °C | 210 mm | +67 mm |
| Sep | 21.3 °C | +1.5 °C | 127 mm | +3 mm |
| Oct | 15.4 °C | +0.9 °C | 84 mm | -47 mm |
| Nov | 10.3 °C | +1.7 °C | 100 mm | -18 mm |
| Dec | 8.5 °C | +4.0 °C | 55 mm | -16 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 Grassobbio?
Grassobbio has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 9.6 °C and it receives 1,365 mm of precipitation per year.
What is the hottest day ever recorded in Grassobbio?
The hottest day measured in Grassobbio between 1940 and 2025 was 27 June 2019, reaching 33.5 °C.
What is the coldest day in Grassobbio?
The coldest day measured in Grassobbio between 1940 and 2025 was 14 February 1940, at -24.2 °C.
Does it snow in Grassobbio?
Yes. Grassobbio gets on average 84.7 cm of snow per year and has around 98 frost days.
Has the climate of Grassobbio warmed?
Yes: Grassobbio warmed by +3.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grassobbio?
The wettest day measured in Grassobbio between 1940 and 2025 was 5 September 1960, with 94 mm of rain in 24 hours.
What was the windiest day in Grassobbio?
The windiest day measured in Grassobbio between 1940 and 2025 was 5 June 1994, with winds reaching 26.6 km/h.
What is the warmest month in Grassobbio?
The warmest month in Grassobbio is July (19.6 °C on average); the coldest is January (-0.9 °C).
How much does it rain in Grassobbio?
Grassobbio receives on average 1,365 mm of precipitation per year, spread over about 159 rainy days.
Is it sunny in Grassobbio?
Grassobbio gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grassobbio?
The heaviest 24-hour snowfall measured in Grassobbio between 1940 and 2025 was 17 February 1967, with 31.4 cm.
Are there tropical nights in Grassobbio?
Yes: Grassobbio has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Grassobbio?
In Grassobbio, between 1940 and 2025, the highest apparent temperature reached 38.6 °C on 27 June 2019, and the lowest was -29.8 °C on 14 February 1940.
Compare Grassobbio with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grassobbio