Chaohu climate — normals and trends
Chaohu (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.5 °C and it receives 1,330 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 (28.7 °C on average) and the coldest is January (3.3 °C). Rainfall peaks in June.
Chaohu averages 32 frost days, 67 hot days (≥ 30 °C) and 121 rainy days per year.
Chaohu has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 42 to 22 per year over the period.
The hottest day of the period reached 39.2 °C (on 1 August 1971) and the coldest -15.2 °C (on 16 January 1955).
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
ChaohuAnhui
- coords
- 31.60°, 117.87°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.5°C
Average daily high
20.2°C
Average daily low
13.3°C
Annual rainfall
1,330mm
Sunshine / day
7.8h
Mean relative humidity
76%
Average peak wind
15.2km/h
Seasonal range
25.4°C
Frost days (< 0 °C)
32 d/yr
Hot days (≥ 30 °C)
67 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
16.6 cm
Average feels-like high
20.7 °C
Average feels-like low
12.8 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
114 d/yr
Solar radiation
14.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.30 · 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
39.2 °C
1 August 1971
Coldest day
-15.2 °C
16 January 1955
Wettest day
196 mm
13 June 1984
Windiest day
42.5 km/h
7 November 1995
Strongest gust
85.0 km/h
7 August 2005
Hottest feels-like
48.5 °C
27 July 2017
Coldest feels-like
-20.1 °C
16 January 1955
Snowiest day
24.8 cm
4 January 2018
Sunniest day
13.9 h
30 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 | 10.9 °C | +4.1 °C | 19 mm | -27 mm |
| Feb | 10.3 °C | +1.4 °C | 16 mm | -49 mm |
| Mar | 17.3 °C | +3.2 °C | 64 mm | -35 mm |
| Apr | 25.6 °C | +5.2 °C | 56 mm | -64 mm |
| May | 27.6 °C | +2.3 °C | 201 mm | +47 mm |
| Jun | 28.7 °C | +0.1 °C | 310 mm | +56 mm |
| Jul | 34.1 °C | +2.4 °C | 78 mm | -135 mm |
| Aug | 33.8 °C | +2.2 °C | 78 mm | -54 mm |
| Sep | 29.0 °C | +1.8 °C | 195 mm | +90 mm |
| Oct | 23.0 °C | +1.0 °C | 68 mm | +11 mm |
| Nov | 17.8 °C | +1.9 °C | 35 mm | -17 mm |
| Dec | 12.6 °C | +3.1 °C | 12 mm | -22 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 Chaohu?
Chaohu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.5 °C and it receives 1,330 mm of precipitation per year.
What is the hottest day ever recorded in Chaohu?
The hottest day measured in Chaohu between 1940 and 2025 was 1 August 1971, reaching 39.2 °C.
What is the coldest day in Chaohu?
The coldest day measured in Chaohu between 1940 and 2025 was 16 January 1955, at -15.2 °C.
Does it snow in Chaohu?
Yes. Chaohu gets on average 16.6 cm of snow per year and has around 32 frost days.
Has the climate of Chaohu warmed?
Yes: Chaohu warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chaohu?
The wettest day measured in Chaohu between 1940 and 2025 was 13 June 1984, with 196 mm of rain in 24 hours.
What was the windiest day in Chaohu?
The windiest day measured in Chaohu between 1940 and 2025 was 7 November 1995, with winds reaching 42.5 km/h.
What is the warmest month in Chaohu?
The warmest month in Chaohu is July (28.7 °C on average); the coldest is January (3.3 °C).
How much does it rain in Chaohu?
Chaohu receives on average 1,330 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Chaohu?
Chaohu gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chaohu?
The heaviest 24-hour snowfall measured in Chaohu between 1940 and 2025 was 4 January 2018, with 24.8 cm.
Are there tropical nights in Chaohu?
Yes: Chaohu has on average 114 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chaohu?
In Chaohu, between 1940 and 2025, the highest apparent temperature reached 48.5 °C on 27 July 2017, and the lowest was -20.1 °C on 16 January 1955.
Compare Chaohu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chaohu