Hongzhou climate — normals and trends
Hongzhou (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.1 °C and it receives 2,065 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 (26.9 °C on average) and the coldest is January (5.8 °C). Rainfall peaks in May.
Hongzhou averages 13 frost days, 67 hot days (≥ 30 °C) and 179 rainy days per year.
Hongzhou has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 18 to 8 per year over the period.
The hottest day of the period reached 39.6 °C (on 13 August 1953) and the coldest -8.2 °C (on 11 February 1957).
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
HongzhouGuizhou
- coords
- 26.13°, 109.41°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.1°C
Average daily high
20.9°C
Average daily low
14.0°C
Annual rainfall
2,065mm
Sunshine / day
5.8h
Mean relative humidity
80%
Average peak wind
16.0km/h
Seasonal range
21.1°C
Frost days (< 0 °C)
13 d/yr
Hot days (≥ 30 °C)
67 d/yr
Rainy days (≥ 1 mm)
179 d/yr
Annual snowfall
8.8 cm
Average feels-like high
21.3 °C
Average feels-like low
13.9 °C
Average peak gust
36.0 km/h
Tropical nights (≥ 20 °C)
118 d/yr
Solar radiation
11.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.36 · 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
39.6 °C
13 August 1953
Coldest day
-8.2 °C
11 February 1957
Wettest day
183 mm
8 August 1968
Windiest day
45.4 km/h
15 June 1946
Strongest gust
103.3 km/h
6 July 1946
Hottest feels-like
44.9 °C
15 July 2002
Coldest feels-like
-14.0 °C
25 January 1948
Snowiest day
17.8 cm
28 December 1983
Sunniest day
13.3 h
2 July 1943
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 | 14.1 °C | +5.1 °C | 48 mm | -25 mm |
| Feb | 8.5 °C | -1.9 °C | 81 mm | -20 mm |
| Mar | 16.8 °C | +1.5 °C | 141 mm | -42 mm |
| Apr | 25.1 °C | +4.1 °C | 228 mm | -81 mm |
| May | 26.3 °C | +1.0 °C | 381 mm | +13 mm |
| Jun | 28.4 °C | +0.2 °C | 418 mm | +73 mm |
| Jul | 33.4 °C | +2.6 °C | 86 mm | -91 mm |
| Aug | 32.4 °C | +1.5 °C | 134 mm | -3 mm |
| Sep | 29.9 °C | +1.5 °C | 123 mm | +22 mm |
| Oct | 24.9 °C | +2.2 °C | 43 mm | -75 mm |
| Nov | 18.0 °C | +0.9 °C | 118 mm | +24 mm |
| Dec | 15.1 °C | +3.5 °C | 46 mm | -14 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 Hongzhou?
Hongzhou has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 2,065 mm of precipitation per year.
What is the hottest day ever recorded in Hongzhou?
The hottest day measured in Hongzhou between 1940 and 2025 was 13 August 1953, reaching 39.6 °C.
What is the coldest day in Hongzhou?
The coldest day measured in Hongzhou between 1940 and 2025 was 11 February 1957, at -8.2 °C.
Does it snow in Hongzhou?
Yes. Hongzhou gets on average 8.8 cm of snow per year and has around 13 frost days.
Has the climate of Hongzhou warmed?
Yes: Hongzhou warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Hongzhou?
The wettest day measured in Hongzhou between 1940 and 2025 was 8 August 1968, with 183 mm of rain in 24 hours.
What was the windiest day in Hongzhou?
The windiest day measured in Hongzhou between 1940 and 2025 was 15 June 1946, with winds reaching 45.4 km/h.
What is the warmest month in Hongzhou?
The warmest month in Hongzhou is July (26.9 °C on average); the coldest is January (5.8 °C).
How much does it rain in Hongzhou?
Hongzhou receives on average 2,065 mm of precipitation per year, spread over about 179 rainy days.
Is it sunny in Hongzhou?
Hongzhou gets on average 5.8 hours of sunshine per day, roughly 2,117 hours per year over 1940-2025.
What is the biggest single-day snowfall in Hongzhou?
The heaviest 24-hour snowfall measured in Hongzhou between 1940 and 2025 was 28 December 1983, with 17.8 cm.
Are there tropical nights in Hongzhou?
Yes: Hongzhou has on average 118 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Hongzhou?
In Hongzhou, between 1940 and 2025, the highest apparent temperature reached 44.9 °C on 15 July 2002, and the lowest was -14.0 °C on 25 January 1948.
Compare Hongzhou with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Hongzhou