Syracuse climate — normals and trends
Syracuse (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 18.1 °C and it receives 518 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 (25.9 °C on average) and the coldest is January (12.0 °C). Rainfall peaks in October.
Syracuse averages 0 frost days, 3 hot days (≥ 30 °C) and 69 rainy days per year.
Syracuse has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.8 °C (on 11 August 2021) and the coldest 2.3 °C (on 1 January 1942).
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
SyracuseSicily
- coords
- 37.08°, 15.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.1°C
Average daily high
19.6°C
Average daily low
16.5°C
Annual rainfall
518mm
Sunshine / day
10.8h
Mean relative humidity
75%
Average peak wind
20.5km/h
Seasonal range
13.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
69 d/yr
Annual snowfall
0.1 cm
Average feels-like high
19.8 °C
Average feels-like low
15.5 °C
Average peak gust
31.4 km/h
Tropical nights (≥ 20 °C)
115 d/yr
Solar radiation
17.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.41 · 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
36.8 °C
11 August 2021
Coldest day
2.3 °C
1 January 1942
Wettest day
129 mm
21 September 1988
Windiest day
68.2 km/h
10 February 2023
Strongest gust
106.2 km/h
24 February 2019
Hottest feels-like
39.6 °C
23 July 2023
Coldest feels-like
-4.1 °C
1 January 1942
Snowiest day
0.8 cm
27 February 2011
Sunniest day
14.0 h
19 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 | 15.7 °C | +2.1 °C | 153 mm | +78 mm |
| Feb | 14.3 °C | +0.7 °C | 82 mm | +30 mm |
| Mar | 15.9 °C | +1.3 °C | 75 mm | +28 mm |
| Apr | 17.2 °C | +0.8 °C | 27 mm | -0 mm |
| May | 21.1 °C | +1.4 °C | 55 mm | +41 mm |
| Jun | 26.3 °C | +2.6 °C | 2 mm | -4 mm |
| Jul | 28.9 °C | +2.3 °C | 1 mm | -3 mm |
| Aug | 28.1 °C | +0.8 °C | 5 mm | -4 mm |
| Sep | 26.4 °C | +1.5 °C | 25 mm | -20 mm |
| Oct | 22.2 °C | +0.6 °C | 56 mm | -29 mm |
| Nov | 19.3 °C | +1.1 °C | 18 mm | -53 mm |
| Dec | 16.3 °C | +1.3 °C | 83 mm | +2 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 Syracuse?
Syracuse has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 18.1 °C and it receives 518 mm of precipitation per year.
What is the hottest day ever recorded in Syracuse?
The hottest day measured in Syracuse between 1940 and 2025 was 11 August 2021, reaching 36.8 °C.
What is the coldest day in Syracuse?
The coldest day measured in Syracuse between 1940 and 2025 was 1 January 1942, at 2.3 °C.
Does it snow in Syracuse?
Almost never: Syracuse sees virtually no snow, with about 0 frost days per year.
Has the climate of Syracuse warmed?
Yes: Syracuse warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Syracuse?
The wettest day measured in Syracuse between 1940 and 2025 was 21 September 1988, with 129 mm of rain in 24 hours.
What was the windiest day in Syracuse?
The windiest day measured in Syracuse between 1940 and 2025 was 10 February 2023, with winds reaching 68.2 km/h.
What is the warmest month in Syracuse?
The warmest month in Syracuse is August (25.9 °C on average); the coldest is January (12.0 °C).
How much does it rain in Syracuse?
Syracuse receives on average 518 mm of precipitation per year, spread over about 69 rainy days.
Is it sunny in Syracuse?
Syracuse gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Syracuse?
The heaviest 24-hour snowfall measured in Syracuse between 1940 and 2025 was 27 February 2011, with 0.8 cm.
Are there tropical nights in Syracuse?
Yes: Syracuse has on average 115 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Syracuse?
In Syracuse, between 1940 and 2025, the highest apparent temperature reached 39.6 °C on 23 July 2023, and the lowest was -4.1 °C on 1 January 1942.
Compare Syracuse with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Syracuse