Niscemi climate — normals and trends
Niscemi (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.2 °C and it receives 497 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 (25.2 °C on average) and the coldest is January (8.4 °C). Rainfall peaks in October.
Niscemi averages 6 frost days, 56 hot days (≥ 30 °C) and 70 rainy days per year.
Niscemi has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 10 to 2 per year over the period.
The hottest day of the period reached 41.7 °C (on 7 July 1988) and the coldest -5.9 °C (on 19 December 1961).
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
NiscemiSicily
- coords
- 37.15°, 14.39°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.2°C
Average daily high
21.4°C
Average daily low
11.4°C
Annual rainfall
497mm
Sunshine / day
10.7h
Mean relative humidity
72%
Average peak wind
14.8km/h
Seasonal range
16.8°C
Frost days (< 0 °C)
6 d/yr
Hot days (≥ 30 °C)
56 d/yr
Rainy days (≥ 1 mm)
70 d/yr
Annual snowfall
0.3 cm
Average feels-like high
20.8 °C
Average feels-like low
10.7 °C
Average peak gust
34.6 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
17.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
41.7 °C
7 July 1988
Coldest day
-5.9 °C
19 December 1961
Wettest day
95 mm
10 February 2023
Windiest day
45.4 km/h
24 November 1991
Strongest gust
110.5 km/h
5 March 2009
Hottest feels-like
44.6 °C
7 July 1988
Coldest feels-like
-9.0 °C
19 December 1961
Snowiest day
3.6 cm
27 February 2011
Sunniest day
14.0 h
19 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 15.3 °C | +2.4 °C | 94 mm | +31 mm |
| Feb | 14.6 °C | +1.0 °C | 108 mm | +57 mm |
| Mar | 17.3 °C | +1.7 °C | 91 mm | +43 mm |
| Apr | 19.7 °C | +1.0 °C | 36 mm | -3 mm |
| May | 25.0 °C | +1.4 °C | 70 mm | +45 mm |
| Jun | 31.7 °C | +3.3 °C | 24 mm | +13 mm |
| Jul | 33.9 °C | +2.7 °C | 2 mm | -2 mm |
| Aug | 32.4 °C | +1.3 °C | 6 mm | -5 mm |
| Sep | 29.5 °C | +2.1 °C | 29 mm | -8 mm |
| Oct | 22.8 °C | +0.1 °C | 63 mm | -10 mm |
| Nov | 18.2 °C | +0.3 °C | 45 mm | -24 mm |
| Dec | 15.5 °C | +1.4 °C | 116 mm | +49 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 Niscemi?
Niscemi has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.2 °C and it receives 497 mm of precipitation per year.
What is the hottest day ever recorded in Niscemi?
The hottest day measured in Niscemi between 1940 and 2025 was 7 July 1988, reaching 41.7 °C.
What is the coldest day in Niscemi?
The coldest day measured in Niscemi between 1940 and 2025 was 19 December 1961, at -5.9 °C.
Does it snow in Niscemi?
Almost never: Niscemi sees virtually no snow, with about 6 frost days per year.
Has the climate of Niscemi warmed?
Yes: Niscemi warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Niscemi?
The wettest day measured in Niscemi between 1940 and 2025 was 10 February 2023, with 95 mm of rain in 24 hours.
What was the windiest day in Niscemi?
The windiest day measured in Niscemi between 1940 and 2025 was 24 November 1991, with winds reaching 45.4 km/h.
What is the warmest month in Niscemi?
The warmest month in Niscemi is July (25.2 °C on average); the coldest is January (8.4 °C).
How much does it rain in Niscemi?
Niscemi receives on average 497 mm of precipitation per year, spread over about 70 rainy days.
Is it sunny in Niscemi?
Niscemi gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Niscemi?
The heaviest 24-hour snowfall measured in Niscemi between 1940 and 2025 was 27 February 2011, with 3.6 cm.
Are there tropical nights in Niscemi?
Yes: Niscemi has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Niscemi?
In Niscemi, between 1940 and 2025, the highest apparent temperature reached 44.6 °C on 7 July 1988, and the lowest was -9.0 °C on 19 December 1961.
Compare Niscemi with another city
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Nearby cities
The climate around Niscemi