Caltanissetta climate — normals and trends
Caltanissetta (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.8 °C and it receives 456 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 (24.0 °C on average) and the coldest is January (6.9 °C). Rainfall peaks in October.
Caltanissetta averages 16 frost days, 43 hot days (≥ 30 °C) and 77 rainy days per year.
Caltanissetta has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 26 to 6 per year over the period.
The hottest day of the period reached 40.8 °C (on 18 August 1946) and the coldest -8.3 °C (on 9 January 1966).
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
CaltanissettaSicily
- coords
- 37.49°, 14.06°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.8°C
Average daily high
20.3°C
Average daily low
9.9°C
Annual rainfall
456mm
Sunshine / day
10.4h
Mean relative humidity
72%
Average peak wind
15.4km/h
Seasonal range
17.1°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
43 d/yr
Rainy days (≥ 1 mm)
77 d/yr
Annual snowfall
1.8 cm
Average feels-like high
19.2 °C
Average feels-like low
8.4 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
11 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.45 · 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
40.8 °C
18 August 1946
Coldest day
-8.3 °C
9 January 1966
Wettest day
107 mm
9 December 1996
Windiest day
44.7 km/h
21 January 1981
Strongest gust
100.8 km/h
5 March 2009
Hottest feels-like
43.9 °C
21 July 2025
Coldest feels-like
-12.5 °C
9 January 1966
Snowiest day
16.2 cm
10 February 2023
Sunniest day
14.0 h
13 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 | 13.6 °C | +2.1 °C | 76 mm | +24 mm |
| Feb | 12.9 °C | +0.7 °C | 88 mm | +37 mm |
| Mar | 15.6 °C | +1.4 °C | 81 mm | +30 mm |
| Apr | 18.2 °C | +1.0 °C | 54 mm | +9 mm |
| May | 23.4 °C | +1.1 °C | 70 mm | +42 mm |
| Jun | 31.2 °C | +3.9 °C | 4 mm | -10 mm |
| Jul | 33.4 °C | +3.1 °C | 3 mm | -2 mm |
| Aug | 31.9 °C | +1.7 °C | 6 mm | -4 mm |
| Sep | 29.0 °C | +2.5 °C | 20 mm | -13 mm |
| Oct | 21.4 °C | -0.4 °C | 41 mm | -19 mm |
| Nov | 16.5 °C | -0.2 °C | 27 mm | -27 mm |
| Dec | 13.9 °C | +1.1 °C | 69 mm | +15 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 Caltanissetta?
Caltanissetta has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.8 °C and it receives 456 mm of precipitation per year.
What is the hottest day ever recorded in Caltanissetta?
The hottest day measured in Caltanissetta between 1940 and 2025 was 18 August 1946, reaching 40.8 °C.
What is the coldest day in Caltanissetta?
The coldest day measured in Caltanissetta between 1940 and 2025 was 9 January 1966, at -8.3 °C.
Does it snow in Caltanissetta?
Yes. Caltanissetta gets on average 1.8 cm of snow per year and has around 16 frost days.
Has the climate of Caltanissetta warmed?
Yes: Caltanissetta warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Caltanissetta?
The wettest day measured in Caltanissetta between 1940 and 2025 was 9 December 1996, with 107 mm of rain in 24 hours.
What was the windiest day in Caltanissetta?
The windiest day measured in Caltanissetta between 1940 and 2025 was 21 January 1981, with winds reaching 44.7 km/h.
What is the warmest month in Caltanissetta?
The warmest month in Caltanissetta is July (24.0 °C on average); the coldest is January (6.9 °C).
How much does it rain in Caltanissetta?
Caltanissetta receives on average 456 mm of precipitation per year, spread over about 77 rainy days.
Is it sunny in Caltanissetta?
Caltanissetta gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Caltanissetta?
The heaviest 24-hour snowfall measured in Caltanissetta between 1940 and 2025 was 10 February 2023, with 16.2 cm.
Are there tropical nights in Caltanissetta?
Yes: Caltanissetta has on average 11 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Caltanissetta?
In Caltanissetta, between 1940 and 2025, the highest apparent temperature reached 43.9 °C on 21 July 2025, and the lowest was -12.5 °C on 9 January 1966.
Compare Caltanissetta with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Caltanissetta