Kaiyuan climate — normals and trends
Kaiyuan (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 18.7 °C and it receives 794 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 June (23.3 °C on average) and the coldest is January (12.2 °C). Rainfall peaks in August.
Kaiyuan averages 0 frost days, 35 hot days (≥ 30 °C) and 117 rainy days per year.
Kaiyuan has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.7 °C (on 1 June 1958) and the coldest -5.2 °C (on 18 December 2013).
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
KaiyuanYunnan
- coords
- 23.70°, 103.30°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.7°C
Average daily high
24.3°C
Average daily low
14.5°C
Annual rainfall
794mm
Sunshine / day
8.4h
Mean relative humidity
69%
Average peak wind
13.3km/h
Seasonal range
11.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
35 d/yr
Rainy days (≥ 1 mm)
117 d/yr
Annual snowfall
1.0 cm
Average feels-like high
23.8 °C
Average feels-like low
14.4 °C
Average peak gust
37.5 km/h
Tropical nights (≥ 20 °C)
58 d/yr
Solar radiation
15.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.70 · 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
36.7 °C
1 June 1958
Coldest day
-5.2 °C
18 December 2013
Wettest day
109 mm
8 March 1973
Windiest day
32.5 km/h
7 March 1980
Strongest gust
86.0 km/h
4 August 1979
Hottest feels-like
37.6 °C
1 June 2023
Coldest feels-like
-8.4 °C
18 December 2013
Snowiest day
22.5 cm
28 December 1983
Sunniest day
13.4 h
14 June 1970
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 | 18.3 °C | -0.3 °C | 14 mm | +1 mm |
| Feb | 20.9 °C | -0.1 °C | 11 mm | -3 mm |
| Mar | 24.2 °C | -0.6 °C | 10 mm | -12 mm |
| Apr | 27.2 °C | -0.3 °C | 28 mm | -2 mm |
| May | 27.9 °C | -0.5 °C | 136 mm | +58 mm |
| Jun | 26.9 °C | -0.7 °C | 225 mm | +85 mm |
| Jul | 27.9 °C | +0.9 °C | 216 mm | +62 mm |
| Aug | 27.0 °C | +0.3 °C | 139 mm | -22 mm |
| Sep | 26.5 °C | +0.6 °C | 153 mm | +58 mm |
| Oct | 24.4 °C | +0.6 °C | 56 mm | +5 mm |
| Nov | 19.6 °C | -1.7 °C | 58 mm | +34 mm |
| Dec | 19.6 °C | +1.0 °C | 7 mm | -6 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 Kaiyuan?
Kaiyuan has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 18.7 °C and it receives 794 mm of precipitation per year.
What is the hottest day ever recorded in Kaiyuan?
The hottest day measured in Kaiyuan between 1940 and 2025 was 1 June 1958, reaching 36.7 °C.
What is the coldest day in Kaiyuan?
The coldest day measured in Kaiyuan between 1940 and 2025 was 18 December 2013, at -5.2 °C.
Does it snow in Kaiyuan?
Almost never: Kaiyuan sees virtually no snow, with about 0 frost days per year.
Has the climate of Kaiyuan warmed?
Yes: Kaiyuan warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Kaiyuan?
The wettest day measured in Kaiyuan between 1940 and 2025 was 8 March 1973, with 109 mm of rain in 24 hours.
What was the windiest day in Kaiyuan?
The windiest day measured in Kaiyuan between 1940 and 2025 was 7 March 1980, with winds reaching 32.5 km/h.
What is the warmest month in Kaiyuan?
The warmest month in Kaiyuan is June (23.3 °C on average); the coldest is January (12.2 °C).
How much does it rain in Kaiyuan?
Kaiyuan receives on average 794 mm of precipitation per year, spread over about 117 rainy days.
Is it sunny in Kaiyuan?
Kaiyuan gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Kaiyuan?
The heaviest 24-hour snowfall measured in Kaiyuan between 1940 and 2025 was 28 December 1983, with 22.5 cm.
Are there tropical nights in Kaiyuan?
Yes: Kaiyuan has on average 58 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Kaiyuan?
In Kaiyuan, between 1940 and 2025, the highest apparent temperature reached 37.6 °C on 1 June 2023, and the lowest was -8.4 °C on 18 December 2013.
Compare Kaiyuan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Kaiyuan