Palermo climate — normals and trends
Palermo (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.5 °C and it receives 612 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 August (25.2 °C on average) and the coldest is January (9.1 °C). Rainfall peaks in October.
Palermo averages 1 frost days, 37 hot days (≥ 30 °C) and 103 rainy days per year.
Palermo has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The number of frost days there went from about 2 to 0 per year over the period.
The hottest day of the period reached 41.7 °C (on 10 August 1999) and the coldest -3.9 °C (on 5 March 1949).
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
PalermoSicily
- coords
- 38.12°, 13.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.5°C
Average daily high
20.5°C
Average daily low
12.8°C
Annual rainfall
612mm
Sunshine / day
10.7h
Mean relative humidity
73%
Average peak wind
14.2km/h
Seasonal range
16.1°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
37 d/yr
Rainy days (≥ 1 mm)
103 d/yr
Annual snowfall
1.4 cm
Average feels-like high
20.2 °C
Average feels-like low
12.1 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
51 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.65 · 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
10 August 1999
Coldest day
-3.9 °C
5 March 1949
Wettest day
77 mm
5 September 1948
Windiest day
46.4 km/h
21 January 1981
Strongest gust
130.0 km/h
21 January 1981
Hottest feels-like
43.4 °C
9 August 1999
Coldest feels-like
-7.6 °C
5 March 1949
Snowiest day
3.9 cm
10 January 1945
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 | 14.9 °C | +2.4 °C | 86 mm | +18 mm |
| Feb | 14.5 °C | +1.5 °C | 75 mm | +9 mm |
| Mar | 17.2 °C | +2.2 °C | 74 mm | +7 mm |
| Apr | 19.0 °C | +1.2 °C | 53 mm | -7 mm |
| May | 23.0 °C | +0.8 °C | 65 mm | +25 mm |
| Jun | 29.9 °C | +3.2 °C | 40 mm | +24 mm |
| Jul | 31.9 °C | +2.3 °C | 4 mm | -4 mm |
| Aug | 30.9 °C | +1.1 °C | 7 mm | -11 mm |
| Sep | 28.0 °C | +1.6 °C | 50 mm | -1 mm |
| Oct | 22.1 °C | 0.0 °C | 80 mm | +0 mm |
| Nov | 17.6 °C | +0.2 °C | 58 mm | -11 mm |
| Dec | 15.4 °C | +1.6 °C | 54 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 Palermo?
Palermo has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 612 mm of precipitation per year.
What is the hottest day ever recorded in Palermo?
The hottest day measured in Palermo between 1940 and 2025 was 10 August 1999, reaching 41.7 °C.
What is the coldest day in Palermo?
The coldest day measured in Palermo between 1940 and 2025 was 5 March 1949, at -3.9 °C.
Does it snow in Palermo?
Yes. Palermo gets on average 1.4 cm of snow per year and has around 1 frost days.
Has the climate of Palermo warmed?
Yes: Palermo warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Palermo?
The wettest day measured in Palermo between 1940 and 2025 was 5 September 1948, with 77 mm of rain in 24 hours.
What was the windiest day in Palermo?
The windiest day measured in Palermo between 1940 and 2025 was 21 January 1981, with winds reaching 46.4 km/h.
What is the warmest month in Palermo?
The warmest month in Palermo is August (25.2 °C on average); the coldest is January (9.1 °C).
How much does it rain in Palermo?
Palermo receives on average 612 mm of precipitation per year, spread over about 103 rainy days.
Is it sunny in Palermo?
Palermo 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 Palermo?
The heaviest 24-hour snowfall measured in Palermo between 1940 and 2025 was 10 January 1945, with 3.9 cm.
Are there tropical nights in Palermo?
Yes: Palermo has on average 51 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Palermo?
In Palermo, between 1940 and 2025, the highest apparent temperature reached 43.4 °C on 9 August 1999, and the lowest was -7.6 °C on 5 March 1949.
Compare Palermo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Palermo