Acqui Terme climate — normals and trends
Acqui Terme (Italy) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 12.5 °C and it receives 856 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 (23.3 °C on average) and the coldest is January (1.5 °C). Rainfall peaks in November.
Acqui Terme averages 58 frost days, 24 hot days (≥ 30 °C) and 98 rainy days per year.
Acqui Terme 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 84 to 32 per year over the period.
The hottest day of the period reached 39.7 °C (on 27 June 2019) and the coldest -21.5 °C (on 19 January 1940).
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
Acqui TermePiedmont
- coords
- 44.68°, 8.47°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.5°C
Average daily high
17.0°C
Average daily low
8.5°C
Annual rainfall
856mm
Sunshine / day
9.0h
Mean relative humidity
75%
Average peak wind
10.9km/h
Seasonal range
21.8°C
Frost days (< 0 °C)
58 d/yr
Hot days (≥ 30 °C)
24 d/yr
Rainy days (≥ 1 mm)
98 d/yr
Annual snowfall
81.1 cm
Average feels-like high
16.2 °C
Average feels-like low
7.1 °C
Average peak gust
24.5 km/h
Tropical nights (≥ 20 °C)
17 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 = 0.73 · 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
39.7 °C
27 June 2019
Coldest day
-21.5 °C
19 January 1940
Wettest day
144 mm
2 November 1968
Windiest day
41.7 km/h
30 October 2018
Strongest gust
82.1 km/h
17 July 2011
Hottest feels-like
42.6 °C
27 June 2019
Coldest feels-like
-26.2 °C
19 January 1940
Snowiest day
44.4 cm
28 November 2008
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 | 6.4 °C | +1.1 °C | 75 mm | +11 mm |
| Feb | 8.0 °C | 0.0 °C | 63 mm | -3 mm |
| Mar | 13.4 °C | +0.7 °C | 107 mm | +32 mm |
| Apr | 18.0 °C | +1.4 °C | 112 mm | +31 mm |
| May | 21.6 °C | +0.8 °C | 88 mm | +14 mm |
| Jun | 29.7 °C | +4.4 °C | 11 mm | -42 mm |
| Jul | 29.0 °C | +0.4 °C | 71 mm | +33 mm |
| Aug | 29.3 °C | +1.3 °C | 130 mm | +72 mm |
| Sep | 23.4 °C | -0.3 °C | 61 mm | -12 mm |
| Oct | 17.9 °C | +0.5 °C | 34 mm | -66 mm |
| Nov | 11.0 °C | +0.2 °C | 59 mm | -45 mm |
| Dec | 8.5 °C | +2.1 °C | 153 mm | +82 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 Acqui Terme?
Acqui Terme has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 12.5 °C and it receives 856 mm of precipitation per year.
What is the hottest day ever recorded in Acqui Terme?
The hottest day measured in Acqui Terme between 1940 and 2025 was 27 June 2019, reaching 39.7 °C.
What is the coldest day in Acqui Terme?
The coldest day measured in Acqui Terme between 1940 and 2025 was 19 January 1940, at -21.5 °C.
Does it snow in Acqui Terme?
Yes. Acqui Terme gets on average 81.1 cm of snow per year and has around 58 frost days.
Has the climate of Acqui Terme warmed?
Yes: Acqui Terme warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Acqui Terme?
The wettest day measured in Acqui Terme between 1940 and 2025 was 2 November 1968, with 144 mm of rain in 24 hours.
What was the windiest day in Acqui Terme?
The windiest day measured in Acqui Terme between 1940 and 2025 was 30 October 2018, with winds reaching 41.7 km/h.
What is the warmest month in Acqui Terme?
The warmest month in Acqui Terme is July (23.3 °C on average); the coldest is January (1.5 °C).
How much does it rain in Acqui Terme?
Acqui Terme receives on average 856 mm of precipitation per year, spread over about 98 rainy days.
Is it sunny in Acqui Terme?
Acqui Terme gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Acqui Terme?
The heaviest 24-hour snowfall measured in Acqui Terme between 1940 and 2025 was 28 November 2008, with 44.4 cm.
Are there tropical nights in Acqui Terme?
Yes: Acqui Terme has on average 17 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Acqui Terme?
In Acqui Terme, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 27 June 2019, and the lowest was -26.2 °C on 19 January 1940.
Compare Acqui Terme with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Acqui Terme