Sanxi climate — normals and trends
Sanxi (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 1,491 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 (23.5 °C on average) and the coldest is January (1.7 °C). Rainfall peaks in July.
Sanxi averages 47 frost days, 12 hot days (≥ 30 °C) and 172 rainy days per year.
Sanxi 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 60 to 34 per year over the period.
The hottest day of the period reached 34.3 °C (on 21 August 1959) and the coldest -18.7 °C (on 28 December 1991).
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
SanxiChongqing Municipality
- coords
- 31.13°, 110.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
16.7°C
Average daily low
9.9°C
Annual rainfall
1,491mm
Sunshine / day
7.4h
Mean relative humidity
78%
Average peak wind
5.7km/h
Seasonal range
21.8°C
Frost days (< 0 °C)
47 d/yr
Hot days (≥ 30 °C)
12 d/yr
Rainy days (≥ 1 mm)
172 d/yr
Annual snowfall
45.7 cm
Average feels-like high
16.9 °C
Average feels-like low
9.4 °C
Average peak gust
27.1 km/h
Tropical nights (≥ 20 °C)
39 d/yr
Solar radiation
13.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.33 · 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
34.3 °C
21 August 1959
Coldest day
-18.7 °C
28 December 1991
Wettest day
260 mm
20 July 1987
Windiest day
15.5 km/h
25 May 1946
Strongest gust
87.5 km/h
18 March 1966
Hottest feels-like
39.9 °C
23 July 1961
Coldest feels-like
-23.3 °C
28 December 1991
Snowiest day
18.1 cm
8 March 1996
Sunniest day
13.7 h
2 July 1973
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 | 7.4 °C | +2.6 °C | 53 mm | +11 mm |
| Feb | 7.2 °C | +0.4 °C | 24 mm | -29 mm |
| Mar | 12.7 °C | +0.8 °C | 87 mm | -6 mm |
| Apr | 20.5 °C | +3.1 °C | 59 mm | -51 mm |
| May | 24.2 °C | +2.8 °C | 81 mm | -73 mm |
| Jun | 25.4 °C | +0.7 °C | 185 mm | -13 mm |
| Jul | 30.6 °C | +3.4 °C | 91 mm | -164 mm |
| Aug | 29.1 °C | +1.9 °C | 227 mm | +49 mm |
| Sep | 24.1 °C | +1.3 °C | 186 mm | +21 mm |
| Oct | 18.2 °C | +0.8 °C | 252 mm | +130 mm |
| Nov | 13.4 °C | +1.4 °C | 45 mm | -32 mm |
| Dec | 9.8 °C | +3.1 °C | 46 mm | +2 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 Sanxi?
Sanxi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 1,491 mm of precipitation per year.
What is the hottest day ever recorded in Sanxi?
The hottest day measured in Sanxi between 1940 and 2025 was 21 August 1959, reaching 34.3 °C.
What is the coldest day in Sanxi?
The coldest day measured in Sanxi between 1940 and 2025 was 28 December 1991, at -18.7 °C.
Does it snow in Sanxi?
Yes. Sanxi gets on average 45.7 cm of snow per year and has around 47 frost days.
Has the climate of Sanxi warmed?
Yes: Sanxi warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sanxi?
The wettest day measured in Sanxi between 1940 and 2025 was 20 July 1987, with 260 mm of rain in 24 hours.
What was the windiest day in Sanxi?
The windiest day measured in Sanxi between 1940 and 2025 was 25 May 1946, with winds reaching 15.5 km/h.
What is the warmest month in Sanxi?
The warmest month in Sanxi is July (23.5 °C on average); the coldest is January (1.7 °C).
How much does it rain in Sanxi?
Sanxi receives on average 1,491 mm of precipitation per year, spread over about 172 rainy days.
Is it sunny in Sanxi?
Sanxi gets on average 7.4 hours of sunshine per day, roughly 2,701 hours per year over 1940-2025.
What is the biggest single-day snowfall in Sanxi?
The heaviest 24-hour snowfall measured in Sanxi between 1940 and 2025 was 8 March 1996, with 18.1 cm.
Are there tropical nights in Sanxi?
Yes: Sanxi has on average 39 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sanxi?
In Sanxi, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 23 July 1961, and the lowest was -23.3 °C on 28 December 1991.
Compare Sanxi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sanxi