Hefei climate — normals and trends
Hefei (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.4 °C and it receives 1,171 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 (28.6 °C on average) and the coldest is January (2.9 °C). Rainfall peaks in June.
Hefei averages 39 frost days, 71 hot days (≥ 30 °C) and 116 rainy days per year.
Hefei 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 49 to 29 per year over the period.
The hottest day of the period reached 40.2 °C (on 15 August 2022) and the coldest -23.4 °C (on 11 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
HefeiAnhui
- coords
- 31.86°, 117.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.4°C
Average daily high
20.4°C
Average daily low
12.8°C
Annual rainfall
1,171mm
Sunshine / day
7.8h
Mean relative humidity
74%
Average peak wind
14.7km/h
Seasonal range
25.7°C
Frost days (< 0 °C)
39 d/yr
Hot days (≥ 30 °C)
71 d/yr
Rainy days (≥ 1 mm)
116 d/yr
Annual snowfall
16.8 cm
Average feels-like high
20.7 °C
Average feels-like low
12.3 °C
Average peak gust
30.3 km/h
Tropical nights (≥ 20 °C)
109 d/yr
Solar radiation
14.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.26 · 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
40.2 °C
15 August 2022
Coldest day
-23.4 °C
11 January 1955
Wettest day
174 mm
27 June 1999
Windiest day
41.8 km/h
24 April 1944
Strongest gust
83.5 km/h
17 August 2018
Hottest feels-like
47.8 °C
10 July 1988
Coldest feels-like
-27.6 °C
11 January 1955
Snowiest day
25.8 cm
4 January 2018
Sunniest day
13.9 h
12 June 1941
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 | 11.1 °C | +4.2 °C | 22 mm | -18 mm |
| Feb | 10.6 °C | +1.5 °C | 11 mm | -44 mm |
| Mar | 17.7 °C | +3.3 °C | 61 mm | -20 mm |
| Apr | 25.9 °C | +5.1 °C | 63 mm | -39 mm |
| May | 27.9 °C | +2.3 °C | 182 mm | +50 mm |
| Jun | 28.9 °C | -0.1 °C | 272 mm | +68 mm |
| Jul | 34.2 °C | +2.4 °C | 76 mm | -126 mm |
| Aug | 33.6 °C | +1.9 °C | 125 mm | -3 mm |
| Sep | 28.5 °C | +1.1 °C | 158 mm | +59 mm |
| Oct | 22.4 °C | +0.3 °C | 77 mm | +21 mm |
| Nov | 18.3 °C | +2.3 °C | 27 mm | -18 mm |
| Dec | 12.7 °C | +3.1 °C | 12 mm | -18 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 Hefei?
Hefei has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.4 °C and it receives 1,171 mm of precipitation per year.
What is the hottest day ever recorded in Hefei?
The hottest day measured in Hefei between 1940 and 2025 was 15 August 2022, reaching 40.2 °C.
What is the coldest day in Hefei?
The coldest day measured in Hefei between 1940 and 2025 was 11 January 1955, at -23.4 °C.
Does it snow in Hefei?
Yes. Hefei gets on average 16.8 cm of snow per year and has around 39 frost days.
Has the climate of Hefei warmed?
Yes: Hefei warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hefei?
The wettest day measured in Hefei between 1940 and 2025 was 27 June 1999, with 174 mm of rain in 24 hours.
What was the windiest day in Hefei?
The windiest day measured in Hefei between 1940 and 2025 was 24 April 1944, with winds reaching 41.8 km/h.
What is the warmest month in Hefei?
The warmest month in Hefei is July (28.6 °C on average); the coldest is January (2.9 °C).
How much does it rain in Hefei?
Hefei receives on average 1,171 mm of precipitation per year, spread over about 116 rainy days.
Is it sunny in Hefei?
Hefei 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 Hefei?
The heaviest 24-hour snowfall measured in Hefei between 1940 and 2025 was 4 January 2018, with 25.8 cm.
Are there tropical nights in Hefei?
Yes: Hefei has on average 109 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hefei?
In Hefei, between 1940 and 2025, the highest apparent temperature reached 47.8 °C on 10 July 1988, and the lowest was -27.6 °C on 11 January 1955.
Compare Hefei with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hefei