Ariano Irpino climate — normals and trends
Ariano Irpino (Italy) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 12.8 °C and it receives 762 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 (22.2 °C on average) and the coldest is January (4.3 °C). Rainfall peaks in November.
Ariano Irpino averages 30 frost days, 19 hot days (≥ 30 °C) and 116 rainy days per year.
Ariano Irpino has warmed by +2.0 °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 45 to 15 per year over the period.
The hottest day of the period reached 38.3 °C (on 17 July 2023) and the coldest -16.9 °C (on 22 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
Ariano IrpinoCampania
- coords
- 41.16°, 15.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.8°C
Average daily high
17.0°C
Average daily low
9.0°C
Annual rainfall
762mm
Sunshine / day
9.4h
Mean relative humidity
76%
Average peak wind
16.3km/h
Seasonal range
17.9°C
Frost days (< 0 °C)
30 d/yr
Hot days (≥ 30 °C)
19 d/yr
Rainy days (≥ 1 mm)
116 d/yr
Annual snowfall
43.9 cm
Average feels-like high
15.4 °C
Average feels-like low
7.2 °C
Average peak gust
38.7 km/h
Tropical nights (≥ 20 °C)
10 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
38.3 °C
17 July 2023
Coldest day
-16.9 °C
22 January 1942
Wettest day
92 mm
18 September 1970
Windiest day
42.6 km/h
2 February 2013
Strongest gust
113.0 km/h
13 December 1957
Hottest feels-like
40.4 °C
17 July 2023
Coldest feels-like
-20.7 °C
22 January 1942
Snowiest day
30.0 cm
3 December 1973
Sunniest day
14.0 h
6 July 2025
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 | 9.4 °C | +1.9 °C | 96 mm | +16 mm |
| Feb | 9.9 °C | +1.3 °C | 55 mm | -16 mm |
| Mar | 13.1 °C | +1.9 °C | 100 mm | +26 mm |
| Apr | 16.1 °C | +1.3 °C | 59 mm | -13 mm |
| May | 19.3 °C | -0.3 °C | 61 mm | +3 mm |
| Jun | 29.2 °C | +5.0 °C | 12 mm | -32 mm |
| Jul | 29.0 °C | +1.6 °C | 21 mm | -9 mm |
| Aug | 28.2 °C | +0.6 °C | 37 mm | +6 mm |
| Sep | 24.7 °C | +1.4 °C | 23 mm | -31 mm |
| Oct | 16.8 °C | -1.3 °C | 77 mm | +1 mm |
| Nov | 13.2 °C | +0.4 °C | 122 mm | +31 mm |
| Dec | 10.7 °C | +1.8 °C | 30 mm | -54 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 Ariano Irpino?
Ariano Irpino has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 12.8 °C and it receives 762 mm of precipitation per year.
What is the hottest day ever recorded in Ariano Irpino?
The hottest day measured in Ariano Irpino between 1940 and 2025 was 17 July 2023, reaching 38.3 °C.
What is the coldest day in Ariano Irpino?
The coldest day measured in Ariano Irpino between 1940 and 2025 was 22 January 1942, at -16.9 °C.
Does it snow in Ariano Irpino?
Yes. Ariano Irpino gets on average 43.9 cm of snow per year and has around 30 frost days.
Has the climate of Ariano Irpino warmed?
Yes: Ariano Irpino warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ariano Irpino?
The wettest day measured in Ariano Irpino between 1940 and 2025 was 18 September 1970, with 92 mm of rain in 24 hours.
What was the windiest day in Ariano Irpino?
The windiest day measured in Ariano Irpino between 1940 and 2025 was 2 February 2013, with winds reaching 42.6 km/h.
What is the warmest month in Ariano Irpino?
The warmest month in Ariano Irpino is July (22.2 °C on average); the coldest is January (4.3 °C).
How much does it rain in Ariano Irpino?
Ariano Irpino receives on average 762 mm of precipitation per year, spread over about 116 rainy days.
Is it sunny in Ariano Irpino?
Ariano Irpino gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ariano Irpino?
The heaviest 24-hour snowfall measured in Ariano Irpino between 1940 and 2025 was 3 December 1973, with 30.0 cm.
Are there tropical nights in Ariano Irpino?
Yes: Ariano Irpino has on average 10 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ariano Irpino?
In Ariano Irpino, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 17 July 2023, and the lowest was -20.7 °C on 22 January 1942.
Compare Ariano Irpino with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ariano Irpino