Tongchuan climate — normals and trends
Tongchuan (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 17.5 °C and it receives 1,190 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 (6.8 °C). Rainfall peaks in July.
Tongchuan averages 6 frost days, 62 hot days (≥ 30 °C) and 142 rainy days per year.
Tongchuan has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 11 to 1 per year over the period.
The hottest day of the period reached 43.7 °C (on 21 August 2022) and the coldest -7.7 °C (on 5 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
TongchuanSichuan
- coords
- 31.09°, 105.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.5°C
Average daily high
21.2°C
Average daily low
14.2°C
Annual rainfall
1,190mm
Sunshine / day
6.7h
Mean relative humidity
75%
Average peak wind
12.6km/h
Seasonal range
20.1°C
Frost days (< 0 °C)
6 d/yr
Hot days (≥ 30 °C)
62 d/yr
Rainy days (≥ 1 mm)
142 d/yr
Annual snowfall
2.4 cm
Average feels-like high
21.8 °C
Average feels-like low
14.2 °C
Average peak gust
25.1 km/h
Tropical nights (≥ 20 °C)
108 d/yr
Solar radiation
12.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.41 · 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
43.7 °C
21 August 2022
Coldest day
-7.7 °C
5 January 1955
Wettest day
233 mm
8 September 1941
Windiest day
74.2 km/h
23 May 1946
Strongest gust
90.4 km/h
12 April 1980
Hottest feels-like
46.8 °C
15 July 2022
Coldest feels-like
-12.3 °C
5 January 1955
Snowiest day
6.4 cm
13 January 1957
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 | 12.0 °C | +1.7 °C | 32 mm | +5 mm |
| Feb | 11.7 °C | -0.6 °C | 61 mm | +32 mm |
| Mar | 17.0 °C | -0.3 °C | 38 mm | -0 mm |
| Apr | 27.1 °C | +4.3 °C | 28 mm | -29 mm |
| May | 30.9 °C | +4.1 °C | 46 mm | -42 mm |
| Jun | 33.1 °C | +4.1 °C | 99 mm | -47 mm |
| Jul | 34.8 °C | +4.1 °C | 158 mm | -109 mm |
| Aug | 34.0 °C | +3.3 °C | 195 mm | -29 mm |
| Sep | 27.3 °C | +1.3 °C | 430 mm | +261 mm |
| Oct | 21.8 °C | +0.8 °C | 153 mm | +78 mm |
| Nov | 16.8 °C | +0.5 °C | 23 mm | -21 mm |
| Dec | 13.0 °C | +1.6 °C | 19 mm | -7 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 Tongchuan?
Tongchuan has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 17.5 °C and it receives 1,190 mm of precipitation per year.
What is the hottest day ever recorded in Tongchuan?
The hottest day measured in Tongchuan between 1940 and 2025 was 21 August 2022, reaching 43.7 °C.
What is the coldest day in Tongchuan?
The coldest day measured in Tongchuan between 1940 and 2025 was 5 January 1955, at -7.7 °C.
Does it snow in Tongchuan?
Yes. Tongchuan gets on average 2.4 cm of snow per year and has around 6 frost days.
Has the climate of Tongchuan warmed?
Yes: Tongchuan warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tongchuan?
The wettest day measured in Tongchuan between 1940 and 2025 was 8 September 1941, with 233 mm of rain in 24 hours.
What was the windiest day in Tongchuan?
The windiest day measured in Tongchuan between 1940 and 2025 was 23 May 1946, with winds reaching 74.2 km/h.
What is the warmest month in Tongchuan?
The warmest month in Tongchuan is July (26.9 °C on average); the coldest is January (6.8 °C).
How much does it rain in Tongchuan?
Tongchuan receives on average 1,190 mm of precipitation per year, spread over about 142 rainy days.
Is it sunny in Tongchuan?
Tongchuan gets on average 6.7 hours of sunshine per day, roughly 2,446 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tongchuan?
The heaviest 24-hour snowfall measured in Tongchuan between 1940 and 2025 was 13 January 1957, with 6.4 cm.
Are there tropical nights in Tongchuan?
Yes: Tongchuan has on average 108 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tongchuan?
In Tongchuan, between 1940 and 2025, the highest apparent temperature reached 46.8 °C on 15 July 2022, and the lowest was -12.3 °C on 5 January 1955.
Compare Tongchuan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tongchuan