Zishui climate — normals and trends
Zishui (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.5 °C and it receives 1,746 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 (25.6 °C on average) and the coldest is January (4.5 °C). Rainfall peaks in July.
Zishui averages 22 frost days, 36 hot days (≥ 30 °C) and 176 rainy days per year.
Zishui has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The number of frost days there went from about 30 to 14 per year over the period.
The hottest day of the period reached 38.3 °C (on 24 August 1959) and the coldest -15.6 °C (on 19 December 1965).
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
ZishuiChongqing Municipality
- coords
- 31.41°, 108.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.5°C
Average daily high
19.0°C
Average daily low
12.1°C
Annual rainfall
1,746mm
Sunshine / day
6.7h
Mean relative humidity
78%
Average peak wind
7.3km/h
Seasonal range
21.1°C
Frost days (< 0 °C)
22 d/yr
Hot days (≥ 30 °C)
36 d/yr
Rainy days (≥ 1 mm)
176 d/yr
Annual snowfall
17.0 cm
Average feels-like high
19.8 °C
Average feels-like low
12.0 °C
Average peak gust
23.4 km/h
Tropical nights (≥ 20 °C)
75 d/yr
Solar radiation
12.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.30 · 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
38.3 °C
24 August 1959
Coldest day
-15.6 °C
19 December 1965
Wettest day
186 mm
30 June 1991
Windiest day
30.5 km/h
23 June 1946
Strongest gust
83.5 km/h
3 July 1946
Hottest feels-like
43.6 °C
23 August 1957
Coldest feels-like
-19.9 °C
19 December 1965
Snowiest day
15.6 cm
13 January 1957
Sunniest day
13.8 h
7 July 2022
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 | 9.6 °C | +1.9 °C | 58 mm | +7 mm |
| Feb | 9.6 °C | -0.1 °C | 37 mm | -25 mm |
| Mar | 14.9 °C | +0.3 °C | 109 mm | +2 mm |
| Apr | 22.7 °C | +3.0 °C | 69 mm | -67 mm |
| May | 26.4 °C | +2.9 °C | 78 mm | -111 mm |
| Jun | 27.7 °C | +1.1 °C | 162 mm | -37 mm |
| Jul | 33.3 °C | +4.1 °C | 103 mm | -164 mm |
| Aug | 32.2 °C | +2.5 °C | 144 mm | -45 mm |
| Sep | 26.2 °C | +1.3 °C | 368 mm | +138 mm |
| Oct | 20.8 °C | +1.5 °C | 311 mm | +152 mm |
| Nov | 14.9 °C | +0.8 °C | 71 mm | -29 mm |
| Dec | 11.3 °C | +2.2 °C | 57 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 Zishui?
Zishui has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.5 °C and it receives 1,746 mm of precipitation per year.
What is the hottest day ever recorded in Zishui?
The hottest day measured in Zishui between 1940 and 2025 was 24 August 1959, reaching 38.3 °C.
What is the coldest day in Zishui?
The coldest day measured in Zishui between 1940 and 2025 was 19 December 1965, at -15.6 °C.
Does it snow in Zishui?
Yes. Zishui gets on average 17.0 cm of snow per year and has around 22 frost days.
Has the climate of Zishui warmed?
Yes: Zishui warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Zishui?
The wettest day measured in Zishui between 1940 and 2025 was 30 June 1991, with 186 mm of rain in 24 hours.
What was the windiest day in Zishui?
The windiest day measured in Zishui between 1940 and 2025 was 23 June 1946, with winds reaching 30.5 km/h.
What is the warmest month in Zishui?
The warmest month in Zishui is July (25.6 °C on average); the coldest is January (4.5 °C).
How much does it rain in Zishui?
Zishui receives on average 1,746 mm of precipitation per year, spread over about 176 rainy days.
Is it sunny in Zishui?
Zishui 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 Zishui?
The heaviest 24-hour snowfall measured in Zishui between 1940 and 2025 was 13 January 1957, with 15.6 cm.
Are there tropical nights in Zishui?
Yes: Zishui has on average 75 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Zishui?
In Zishui, between 1940 and 2025, the highest apparent temperature reached 43.6 °C on 23 August 1957, and the lowest was -19.9 °C on 19 December 1965.
Compare Zishui with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Zishui