Wuxi climate — normals and trends
Wuxi (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.6 °C and it receives 1,396 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 (28.8 °C on average) and the coldest is January (3.7 °C). Rainfall peaks in June.
Wuxi averages 25 frost days, 56 hot days (≥ 30 °C) and 128 rainy days per year.
Wuxi has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 33 to 17 per year over the period.
The hottest day of the period reached 39.6 °C (on 25 July 2017) and the coldest -11.3 °C (on 6 February 1969).
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
WuxiJiangsu
- coords
- 31.57°, 120.29°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.6°C
Average daily high
19.6°C
Average daily low
13.8°C
Annual rainfall
1,396mm
Sunshine / day
7.9h
Mean relative humidity
76%
Average peak wind
19.5km/h
Seasonal range
25.1°C
Frost days (< 0 °C)
25 d/yr
Hot days (≥ 30 °C)
56 d/yr
Rainy days (≥ 1 mm)
128 d/yr
Annual snowfall
10.0 cm
Average feels-like high
19.7 °C
Average feels-like low
12.9 °C
Average peak gust
32.5 km/h
Tropical nights (≥ 20 °C)
117 d/yr
Solar radiation
14.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °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
39.6 °C
25 July 2017
Coldest day
-11.3 °C
6 February 1969
Wettest day
191 mm
26 July 1949
Windiest day
58.4 km/h
8 August 2012
Strongest gust
108.7 km/h
2 August 1956
Hottest feels-like
47.0 °C
2 August 2003
Coldest feels-like
-17.0 °C
24 January 2016
Snowiest day
24.6 cm
18 January 1984
Sunniest day
14.0 h
20 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 | 9.4 °C | +2.8 °C | 10 mm | -43 mm |
| Feb | 8.9 °C | +0.6 °C | 21 mm | -52 mm |
| Mar | 15.8 °C | +2.7 °C | 87 mm | -20 mm |
| Apr | 23.5 °C | +4.3 °C | 44 mm | -79 mm |
| May | 26.2 °C | +2.1 °C | 136 mm | -16 mm |
| Jun | 28.5 °C | +0.9 °C | 310 mm | +47 mm |
| Jul | 32.6 °C | +1.2 °C | 207 mm | +16 mm |
| Aug | 33.3 °C | +2.2 °C | 140 mm | -5 mm |
| Sep | 29.9 °C | +3.1 °C | 161 mm | +35 mm |
| Oct | 23.9 °C | +2.3 °C | 56 mm | -9 mm |
| Nov | 16.4 °C | +0.8 °C | 18 mm | -39 mm |
| Dec | 11.8 °C | +2.6 °C | 9 mm | -33 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 Wuxi?
Wuxi has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.6 °C and it receives 1,396 mm of precipitation per year.
What is the hottest day ever recorded in Wuxi?
The hottest day measured in Wuxi between 1940 and 2025 was 25 July 2017, reaching 39.6 °C.
What is the coldest day in Wuxi?
The coldest day measured in Wuxi between 1940 and 2025 was 6 February 1969, at -11.3 °C.
Does it snow in Wuxi?
Yes. Wuxi gets on average 10.0 cm of snow per year and has around 25 frost days.
Has the climate of Wuxi warmed?
Yes: Wuxi warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Wuxi?
The wettest day measured in Wuxi between 1940 and 2025 was 26 July 1949, with 191 mm of rain in 24 hours.
What was the windiest day in Wuxi?
The windiest day measured in Wuxi between 1940 and 2025 was 8 August 2012, with winds reaching 58.4 km/h.
What is the warmest month in Wuxi?
The warmest month in Wuxi is July (28.8 °C on average); the coldest is January (3.7 °C).
How much does it rain in Wuxi?
Wuxi receives on average 1,396 mm of precipitation per year, spread over about 128 rainy days.
Is it sunny in Wuxi?
Wuxi gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Wuxi?
The heaviest 24-hour snowfall measured in Wuxi between 1940 and 2025 was 18 January 1984, with 24.6 cm.
Are there tropical nights in Wuxi?
Yes: Wuxi has on average 117 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Wuxi?
In Wuxi, between 1940 and 2025, the highest apparent temperature reached 47.0 °C on 2 August 2003, and the lowest was -17.0 °C on 24 January 2016.
Compare Wuxi with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Wuxi