Segni climate — normals and trends
Segni (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 13.0 °C and it receives 1,176 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 (22.5 °C on average) and the coldest is January (4.4 °C). Rainfall peaks in November.
Segni averages 42 frost days, 20 hot days (≥ 30 °C) and 131 rainy days per year.
Segni has warmed by +1.9 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 57 to 27 per year over the period.
The hottest day of the period reached 38.1 °C (on 25 August 2007) and the coldest -18.3 °C (on 14 January 1968).
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
SegniLazio
- coords
- 41.69°, 13.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.0°C
Average daily high
18.0°C
Average daily low
8.4°C
Annual rainfall
1,176mm
Sunshine / day
9.8h
Mean relative humidity
76%
Average peak wind
10.3km/h
Seasonal range
18.1°C
Frost days (< 0 °C)
42 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
14.7 cm
Average feels-like high
17.5 °C
Average feels-like low
7.0 °C
Average peak gust
31.3 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
15.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.48 · 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
38.1 °C
25 August 2007
Coldest day
-18.3 °C
14 January 1968
Wettest day
122 mm
3 September 1959
Windiest day
35.7 km/h
29 October 2018
Strongest gust
130.0 km/h
4 November 1966
Hottest feels-like
40.7 °C
21 June 2024
Coldest feels-like
-23.5 °C
14 January 1968
Snowiest day
22.9 cm
11 March 1956
Sunniest day
14.3 h
22 June 2000
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 | 11.5 °C | +2.6 °C | 75 mm | -21 mm |
| Feb | 12.8 °C | +2.6 °C | 85 mm | -20 mm |
| Mar | 15.2 °C | +2.2 °C | 146 mm | +42 mm |
| Apr | 18.7 °C | +2.6 °C | 143 mm | +28 mm |
| May | 21.6 °C | +1.1 °C | 124 mm | +27 mm |
| Jun | 30.6 °C | +6.0 °C | 20 mm | -46 mm |
| Jul | 30.5 °C | +2.5 °C | 27 mm | -12 mm |
| Aug | 30.0 °C | +1.9 °C | 67 mm | +15 mm |
| Sep | 26.0 °C | +2.1 °C | 134 mm | +39 mm |
| Oct | 19.8 °C | +0.6 °C | 93 mm | -36 mm |
| Nov | 15.3 °C | +1.5 °C | 102 mm | -51 mm |
| Dec | 12.8 °C | +2.8 °C | 56 mm | -70 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 Segni?
Segni has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 13.0 °C and it receives 1,176 mm of precipitation per year.
What is the hottest day ever recorded in Segni?
The hottest day measured in Segni between 1940 and 2025 was 25 August 2007, reaching 38.1 °C.
What is the coldest day in Segni?
The coldest day measured in Segni between 1940 and 2025 was 14 January 1968, at -18.3 °C.
Does it snow in Segni?
Yes. Segni gets on average 14.7 cm of snow per year and has around 42 frost days.
Has the climate of Segni warmed?
Yes: Segni warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Segni?
The wettest day measured in Segni between 1940 and 2025 was 3 September 1959, with 122 mm of rain in 24 hours.
What was the windiest day in Segni?
The windiest day measured in Segni between 1940 and 2025 was 29 October 2018, with winds reaching 35.7 km/h.
What is the warmest month in Segni?
The warmest month in Segni is July (22.5 °C on average); the coldest is January (4.4 °C).
How much does it rain in Segni?
Segni receives on average 1,176 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Segni?
Segni gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
What is the biggest single-day snowfall in Segni?
The heaviest 24-hour snowfall measured in Segni between 1940 and 2025 was 11 March 1956, with 22.9 cm.
Are there tropical nights in Segni?
Yes: Segni has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Segni?
In Segni, between 1940 and 2025, the highest apparent temperature reached 40.7 °C on 21 June 2024, and the lowest was -23.5 °C on 14 January 1968.
Compare Segni with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Segni