Grassano climate — normals and trends
Grassano (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 14.3 °C and it receives 565 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 (24.2 °C on average) and the coldest is January (5.6 °C). Rainfall peaks in November.
Grassano averages 24 frost days, 45 hot days (≥ 30 °C) and 96 rainy days per year.
Grassano has warmed by +1.7 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 35 to 13 per year over the period.
The hottest day of the period reached 41.3 °C (on 12 July 1962) and the coldest -18.6 °C (on 26 January 2006).
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
GrassanoBasilicate
- coords
- 40.63°, 16.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.3°C
Average daily high
19.5°C
Average daily low
9.7°C
Annual rainfall
565mm
Sunshine / day
10.1h
Mean relative humidity
70%
Average peak wind
14.5km/h
Seasonal range
18.6°C
Frost days (< 0 °C)
24 d/yr
Hot days (≥ 30 °C)
45 d/yr
Rainy days (≥ 1 mm)
96 d/yr
Annual snowfall
18.2 cm
Average feels-like high
18.1 °C
Average feels-like low
7.9 °C
Average peak gust
33.9 km/h
Tropical nights (≥ 20 °C)
17 d/yr
Solar radiation
15.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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
41.3 °C
12 July 1962
Coldest day
-18.6 °C
26 January 2006
Wettest day
117 mm
5 November 1949
Windiest day
41.7 km/h
4 November 1966
Strongest gust
104.0 km/h
18 January 1972
Hottest feels-like
42.1 °C
5 August 2017
Coldest feels-like
-22.9 °C
26 January 2006
Snowiest day
24.0 cm
2 December 1983
Sunniest day
14.0 h
23 June 2025
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 | 11.9 °C | +2.1 °C | 111 mm | +55 mm |
| Feb | 11.5 °C | +0.5 °C | 40 mm | -13 mm |
| Mar | 14.5 °C | +0.9 °C | 82 mm | +23 mm |
| Apr | 17.3 °C | +0.2 °C | 50 mm | -6 mm |
| May | 21.8 °C | -0.4 °C | 53 mm | +5 mm |
| Jun | 31.7 °C | +4.5 °C | 9 mm | -27 mm |
| Jul | 32.0 °C | +1.9 °C | 9 mm | -14 mm |
| Aug | 30.3 °C | +0.1 °C | 44 mm | +20 mm |
| Sep | 27.4 °C | +1.4 °C | 8 mm | -31 mm |
| Oct | 18.7 °C | -1.9 °C | 77 mm | +24 mm |
| Nov | 15.1 °C | -0.1 °C | 84 mm | +23 mm |
| Dec | 12.3 °C | +1.2 °C | 50 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 Grassano?
Grassano has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 14.3 °C and it receives 565 mm of precipitation per year.
What is the hottest day ever recorded in Grassano?
The hottest day measured in Grassano between 1940 and 2025 was 12 July 1962, reaching 41.3 °C.
What is the coldest day in Grassano?
The coldest day measured in Grassano between 1940 and 2025 was 26 January 2006, at -18.6 °C.
Does it snow in Grassano?
Yes. Grassano gets on average 18.2 cm of snow per year and has around 24 frost days.
Has the climate of Grassano warmed?
Yes: Grassano warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grassano?
The wettest day measured in Grassano between 1940 and 2025 was 5 November 1949, with 117 mm of rain in 24 hours.
What was the windiest day in Grassano?
The windiest day measured in Grassano between 1940 and 2025 was 4 November 1966, with winds reaching 41.7 km/h.
What is the warmest month in Grassano?
The warmest month in Grassano is July (24.2 °C on average); the coldest is January (5.6 °C).
How much does it rain in Grassano?
Grassano receives on average 565 mm of precipitation per year, spread over about 96 rainy days.
Is it sunny in Grassano?
Grassano gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grassano?
The heaviest 24-hour snowfall measured in Grassano between 1940 and 2025 was 2 December 1983, with 24.0 cm.
Are there tropical nights in Grassano?
Yes: Grassano has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Grassano?
In Grassano, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 5 August 2017, and the lowest was -22.9 °C on 26 January 2006.
Compare Grassano with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grassano