Chaotian climate — normals and trends
Chaotian (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 13.1 °C and it receives 1,269 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 (23.4 °C on average) and the coldest is January (1.9 °C). Rainfall peaks in July.
Chaotian averages 55 frost days, 16 hot days (≥ 30 °C) and 156 rainy days per year.
Chaotian has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 68 to 42 per year over the period.
The hottest day of the period reached 38.1 °C (on 6 July 2022) and the coldest -17.4 °C (on 6 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
ChaotianSichuan
- coords
- 32.64°, 105.89°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.1°C
Average daily high
17.1°C
Average daily low
9.5°C
Annual rainfall
1,269mm
Sunshine / day
7.0h
Mean relative humidity
77%
Average peak wind
10.5km/h
Seasonal range
21.5°C
Frost days (< 0 °C)
55 d/yr
Hot days (≥ 30 °C)
16 d/yr
Rainy days (≥ 1 mm)
156 d/yr
Annual snowfall
23.4 cm
Average feels-like high
16.7 °C
Average feels-like low
8.4 °C
Average peak gust
32.8 km/h
Tropical nights (≥ 20 °C)
31 d/yr
Solar radiation
12.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.55 · 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
38.1 °C
6 July 2022
Coldest day
-17.4 °C
6 January 1955
Wettest day
176 mm
3 August 1954
Windiest day
34.0 km/h
14 May 1983
Strongest gust
115.6 km/h
12 April 1979
Hottest feels-like
40.6 °C
19 August 2016
Coldest feels-like
-21.5 °C
6 January 1955
Snowiest day
9.9 cm
23 February 1994
Sunniest day
14.0 h
10 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 | 7.6 °C | +1.9 °C | 33 mm | +11 mm |
| Feb | 8.1 °C | +0.1 °C | 31 mm | +1 mm |
| Mar | 13.5 °C | +0.4 °C | 31 mm | -20 mm |
| Apr | 23.3 °C | +4.9 °C | 23 mm | -50 mm |
| May | 27.0 °C | +4.6 °C | 57 mm | -46 mm |
| Jun | 28.4 °C | +2.7 °C | 107 mm | -28 mm |
| Jul | 30.3 °C | +2.8 °C | 176 mm | -78 mm |
| Aug | 29.9 °C | +2.9 °C | 184 mm | -31 mm |
| Sep | 23.0 °C | +1.0 °C | 402 mm | +194 mm |
| Oct | 16.8 °C | -0.2 °C | 292 mm | +190 mm |
| Nov | 12.6 °C | +0.8 °C | 34 mm | -17 mm |
| Dec | 9.2 °C | +2.3 °C | 26 mm | +1 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 Chaotian?
Chaotian has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 13.1 °C and it receives 1,269 mm of precipitation per year.
What is the hottest day ever recorded in Chaotian?
The hottest day measured in Chaotian between 1940 and 2025 was 6 July 2022, reaching 38.1 °C.
What is the coldest day in Chaotian?
The coldest day measured in Chaotian between 1940 and 2025 was 6 January 1955, at -17.4 °C.
Does it snow in Chaotian?
Yes. Chaotian gets on average 23.4 cm of snow per year and has around 55 frost days.
Has the climate of Chaotian warmed?
Yes: Chaotian warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Chaotian?
The wettest day measured in Chaotian between 1940 and 2025 was 3 August 1954, with 176 mm of rain in 24 hours.
What was the windiest day in Chaotian?
The windiest day measured in Chaotian between 1940 and 2025 was 14 May 1983, with winds reaching 34.0 km/h.
What is the warmest month in Chaotian?
The warmest month in Chaotian is July (23.4 °C on average); the coldest is January (1.9 °C).
How much does it rain in Chaotian?
Chaotian receives on average 1,269 mm of precipitation per year, spread over about 156 rainy days.
Is it sunny in Chaotian?
Chaotian gets on average 7.0 hours of sunshine per day, roughly 2,555 hours per year over 1940-2025.
What is the biggest single-day snowfall in Chaotian?
The heaviest 24-hour snowfall measured in Chaotian between 1940 and 2025 was 23 February 1994, with 9.9 cm.
Are there tropical nights in Chaotian?
Yes: Chaotian has on average 31 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Chaotian?
In Chaotian, between 1940 and 2025, the highest apparent temperature reached 40.6 °C on 19 August 2016, and the lowest was -21.5 °C on 6 January 1955.
Compare Chaotian with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Chaotian