San Giovanni Gemini climate — normals and trends
San Giovanni Gemini (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 14.8 °C and it receives 584 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 (23.6 °C on average) and the coldest is January (7.1 °C). Rainfall peaks in October.
San Giovanni Gemini averages 9 frost days, 27 hot days (≥ 30 °C) and 101 rainy days per year.
San Giovanni Gemini has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 16 to 2 per year over the period.
The hottest day of the period reached 40.1 °C (on 19 August 1945) 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
San Giovanni GeminiSicily
- coords
- 37.63°, 13.64°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.8°C
Average daily high
19.3°C
Average daily low
10.6°C
Annual rainfall
584mm
Sunshine / day
10.6h
Mean relative humidity
73%
Average peak wind
13.3km/h
Seasonal range
16.5°C
Frost days (< 0 °C)
9 d/yr
Hot days (≥ 30 °C)
27 d/yr
Rainy days (≥ 1 mm)
101 d/yr
Annual snowfall
5.7 cm
Average feels-like high
18.6 °C
Average feels-like low
9.4 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
22 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.57 · 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
40.1 °C
19 August 1945
Coldest day
-8.3 °C
9 January 1966
Wettest day
101 mm
9 December 1996
Windiest day
42.6 km/h
21 January 1981
Strongest gust
125.6 km/h
21 January 1981
Hottest feels-like
43.1 °C
21 July 2025
Coldest feels-like
-12.2 °C
9 January 1966
Snowiest day
13.1 cm
12 February 1956
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 | 13.4 °C | +2.5 °C | 86 mm | +21 mm |
| Feb | 12.8 °C | +1.3 °C | 93 mm | +30 mm |
| Mar | 15.5 °C | +2.0 °C | 100 mm | +33 mm |
| Apr | 17.5 °C | +1.0 °C | 58 mm | -2 mm |
| May | 21.8 °C | +0.7 °C | 85 mm | +46 mm |
| Jun | 29.2 °C | +3.4 °C | 29 mm | +11 mm |
| Jul | 31.1 °C | +2.4 °C | 7 mm | -1 mm |
| Aug | 30.2 °C | +1.4 °C | 10 mm | -7 mm |
| Sep | 27.2 °C | +1.7 °C | 37 mm | -6 mm |
| Oct | 20.4 °C | -0.6 °C | 63 mm | -8 mm |
| Nov | 16.1 °C | +0.1 °C | 49 mm | -16 mm |
| Dec | 13.8 °C | +1.6 °C | 55 mm | -14 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 San Giovanni Gemini?
San Giovanni Gemini has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 14.8 °C and it receives 584 mm of precipitation per year.
What is the hottest day ever recorded in San Giovanni Gemini?
The hottest day measured in San Giovanni Gemini between 1940 and 2025 was 19 August 1945, reaching 40.1 °C.
What is the coldest day in San Giovanni Gemini?
The coldest day measured in San Giovanni Gemini between 1940 and 2025 was 9 January 1966, at -8.3 °C.
Does it snow in San Giovanni Gemini?
Yes. San Giovanni Gemini gets on average 5.7 cm of snow per year and has around 9 frost days.
Has the climate of San Giovanni Gemini warmed?
Yes: San Giovanni Gemini warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Giovanni Gemini?
The wettest day measured in San Giovanni Gemini between 1940 and 2025 was 9 December 1996, with 101 mm of rain in 24 hours.
What was the windiest day in San Giovanni Gemini?
The windiest day measured in San Giovanni Gemini between 1940 and 2025 was 21 January 1981, with winds reaching 42.6 km/h.
What is the warmest month in San Giovanni Gemini?
The warmest month in San Giovanni Gemini is August (23.6 °C on average); the coldest is January (7.1 °C).
How much does it rain in San Giovanni Gemini?
San Giovanni Gemini receives on average 584 mm of precipitation per year, spread over about 101 rainy days.
Is it sunny in San Giovanni Gemini?
San Giovanni Gemini gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in San Giovanni Gemini?
The heaviest 24-hour snowfall measured in San Giovanni Gemini between 1940 and 2025 was 12 February 1956, with 13.1 cm.
Are there tropical nights in San Giovanni Gemini?
Yes: San Giovanni Gemini has on average 22 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in San Giovanni Gemini?
In San Giovanni Gemini, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 21 July 2025, and the lowest was -12.2 °C on 9 January 1966.
Compare San Giovanni Gemini with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Giovanni Gemini