Xishan climate — normals and trends
Xishan (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 18.4 °C and it receives 1,970 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 (29.7 °C on average) and the coldest is January (6.4 °C). Rainfall peaks in May.
Xishan averages 12 frost days, 97 hot days (≥ 30 °C) and 165 rainy days per year.
Xishan has warmed by +0.8 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The number of frost days there went from about 18 to 6 per year over the period.
The hottest day of the period reached 41.2 °C (on 5 August 2010) and the coldest -13.3 °C (on 29 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
XishanHunan
- coords
- 27.67°, 113.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.4°C
Average daily high
22.3°C
Average daily low
14.9°C
Annual rainfall
1,970mm
Sunshine / day
7.0h
Mean relative humidity
77%
Average peak wind
11.5km/h
Seasonal range
23.3°C
Frost days (< 0 °C)
12 d/yr
Hot days (≥ 30 °C)
97 d/yr
Rainy days (≥ 1 mm)
165 d/yr
Annual snowfall
9.0 cm
Average feels-like high
23.7 °C
Average feels-like low
15.5 °C
Average peak gust
28.1 km/h
Tropical nights (≥ 20 °C)
130 d/yr
Solar radiation
13.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.8 °C
since 1940
+0.1 °C per decade · r² = 0.15 · 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
41.2 °C
5 August 2010
Coldest day
-13.3 °C
29 December 1991
Wettest day
172 mm
22 June 1958
Windiest day
37.8 km/h
5 April 1964
Strongest gust
91.1 km/h
5 April 2002
Hottest feels-like
47.2 °C
2 August 2003
Coldest feels-like
-17.4 °C
29 December 1991
Snowiest day
16.2 cm
6 February 1972
Sunniest day
13.0 h
16 June 2025
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 | 14.8 °C | +4.8 °C | 48 mm | -30 mm |
| Feb | 10.7 °C | -0.8 °C | 88 mm | -32 mm |
| Mar | 18.3 °C | +2.0 °C | 142 mm | -69 mm |
| Apr | 25.2 °C | +3.0 °C | 229 mm | -92 mm |
| May | 28.1 °C | +1.5 °C | 290 mm | -42 mm |
| Jun | 30.4 °C | +0.5 °C | 192 mm | -139 mm |
| Jul | 35.1 °C | +1.5 °C | 95 mm | -47 mm |
| Aug | 36.3 °C | +3.0 °C | 43 mm | -82 mm |
| Sep | 32.9 °C | +3.1 °C | 87 mm | +4 mm |
| Oct | 27.2 °C | +3.0 °C | 17 mm | -71 mm |
| Nov | 19.3 °C | +1.1 °C | 91 mm | +8 mm |
| Dec | 16.4 °C | +4.0 °C | 39 mm | -20 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 Xishan?
Xishan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 18.4 °C and it receives 1,970 mm of precipitation per year.
What is the hottest day ever recorded in Xishan?
The hottest day measured in Xishan between 1940 and 2025 was 5 August 2010, reaching 41.2 °C.
What is the coldest day in Xishan?
The coldest day measured in Xishan between 1940 and 2025 was 29 December 1991, at -13.3 °C.
Does it snow in Xishan?
Yes. Xishan gets on average 9.0 cm of snow per year and has around 12 frost days.
Has the climate of Xishan warmed?
Yes: Xishan warmed by +0.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Xishan?
The wettest day measured in Xishan between 1940 and 2025 was 22 June 1958, with 172 mm of rain in 24 hours.
What was the windiest day in Xishan?
The windiest day measured in Xishan between 1940 and 2025 was 5 April 1964, with winds reaching 37.8 km/h.
What is the warmest month in Xishan?
The warmest month in Xishan is July (29.7 °C on average); the coldest is January (6.4 °C).
How much does it rain in Xishan?
Xishan receives on average 1,970 mm of precipitation per year, spread over about 165 rainy days.
Is it sunny in Xishan?
Xishan 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 Xishan?
The heaviest 24-hour snowfall measured in Xishan between 1940 and 2025 was 6 February 1972, with 16.2 cm.
Are there tropical nights in Xishan?
Yes: Xishan has on average 130 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Xishan?
In Xishan, between 1940 and 2025, the highest apparent temperature reached 47.2 °C on 2 August 2003, and the lowest was -17.4 °C on 29 December 1991.
Compare Xishan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Xishan