Mortara climate — normals and trends
Mortara (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 1,008 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 (24.1 °C on average) and the coldest is January (1.9 °C). Rainfall peaks in October.
Mortara averages 52 frost days, 34 hot days (≥ 30 °C) and 110 rainy days per year.
Mortara has warmed by +3.2 °C between 1940 and 2025, or +0.37 °C per decade. This trend is statistically significant.
The number of frost days there went from about 77 to 27 per year over the period.
The hottest day of the period reached 39.9 °C (on 11 August 2003) and the coldest -20.2 °C (on 9 January 1945).
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
MortaraLombardy
- coords
- 45.25°, 8.73°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
17.9°C
Average daily low
9.3°C
Annual rainfall
1,008mm
Sunshine / day
9.2h
Mean relative humidity
74%
Average peak wind
10.9km/h
Seasonal range
22.2°C
Frost days (< 0 °C)
52 d/yr
Hot days (≥ 30 °C)
34 d/yr
Rainy days (≥ 1 mm)
110 d/yr
Annual snowfall
30.4 cm
Average feels-like high
17.2 °C
Average feels-like low
8.0 °C
Average peak gust
22.3 km/h
Tropical nights (≥ 20 °C)
29 d/yr
Solar radiation
13.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.72 · 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
39.9 °C
11 August 2003
Coldest day
-20.2 °C
9 January 1945
Wettest day
112 mm
18 August 1979
Windiest day
46.0 km/h
12 March 2006
Strongest gust
86.8 km/h
26 September 1956
Hottest feels-like
43.2 °C
28 June 2019
Coldest feels-like
-24.8 °C
18 January 1941
Snowiest day
28.6 cm
17 February 1967
Sunniest day
15.0 h
1 June 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 | 7.8 °C | +2.1 °C | 92 mm | +32 mm |
| Feb | 9.7 °C | +0.9 °C | 55 mm | -10 mm |
| Mar | 15.3 °C | +1.4 °C | 115 mm | +36 mm |
| Apr | 20.2 °C | +2.2 °C | 126 mm | +29 mm |
| May | 23.7 °C | +1.3 °C | 129 mm | +24 mm |
| Jun | 31.3 °C | +4.7 °C | 22 mm | -59 mm |
| Jul | 30.2 °C | +0.7 °C | 98 mm | +40 mm |
| Aug | 30.4 °C | +1.6 °C | 122 mm | +41 mm |
| Sep | 24.9 °C | +0.3 °C | 91 mm | +3 mm |
| Oct | 19.2 °C | +1.1 °C | 44 mm | -69 mm |
| Nov | 12.4 °C | +1.0 °C | 58 mm | -55 mm |
| Dec | 9.5 °C | +2.7 °C | 95 mm | +26 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 Mortara?
Mortara has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 1,008 mm of precipitation per year.
What is the hottest day ever recorded in Mortara?
The hottest day measured in Mortara between 1940 and 2025 was 11 August 2003, reaching 39.9 °C.
What is the coldest day in Mortara?
The coldest day measured in Mortara between 1940 and 2025 was 9 January 1945, at -20.2 °C.
Does it snow in Mortara?
Yes. Mortara gets on average 30.4 cm of snow per year and has around 52 frost days.
Has the climate of Mortara warmed?
Yes: Mortara warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mortara?
The wettest day measured in Mortara between 1940 and 2025 was 18 August 1979, with 112 mm of rain in 24 hours.
What was the windiest day in Mortara?
The windiest day measured in Mortara between 1940 and 2025 was 12 March 2006, with winds reaching 46.0 km/h.
What is the warmest month in Mortara?
The warmest month in Mortara is July (24.1 °C on average); the coldest is January (1.9 °C).
How much does it rain in Mortara?
Mortara receives on average 1,008 mm of precipitation per year, spread over about 110 rainy days.
Is it sunny in Mortara?
Mortara gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Mortara?
The heaviest 24-hour snowfall measured in Mortara between 1940 and 2025 was 17 February 1967, with 28.6 cm.
Are there tropical nights in Mortara?
Yes: Mortara has on average 29 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mortara?
In Mortara, between 1940 and 2025, the highest apparent temperature reached 43.2 °C on 28 June 2019, and the lowest was -24.8 °C on 18 January 1941.
Compare Mortara with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mortara