Huai'an climate — normals and trends
Huai'an (China) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 15.0 °C and it receives 1,078 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 (27.5 °C on average) and the coldest is January (1.2 °C). Rainfall peaks in July.
Huai'an averages 62 frost days, 56 hot days (≥ 30 °C) and 100 rainy days per year.
Huai'an has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 74 to 50 per year over the period.
The hottest day of the period reached 39.6 °C (on 11 August 1946) and the coldest -20.0 °C (on 11 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
Huai'anJiangsu
- coords
- 33.59°, 119.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.0°C
Average daily high
19.3°C
Average daily low
11.1°C
Annual rainfall
1,078mm
Sunshine / day
8.4h
Mean relative humidity
74%
Average peak wind
15.7km/h
Seasonal range
26.3°C
Frost days (< 0 °C)
62 d/yr
Hot days (≥ 30 °C)
56 d/yr
Rainy days (≥ 1 mm)
100 d/yr
Annual snowfall
12.0 cm
Average feels-like high
19.1 °C
Average feels-like low
10.2 °C
Average peak gust
31.7 km/h
Tropical nights (≥ 20 °C)
91 d/yr
Solar radiation
15.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
39.6 °C
11 August 1946
Coldest day
-20.0 °C
11 January 1955
Wettest day
206 mm
5 July 2018
Windiest day
45.0 km/h
2 August 1956
Strongest gust
97.6 km/h
2 August 1956
Hottest feels-like
46.4 °C
6 July 2025
Coldest feels-like
-25.0 °C
11 January 1955
Snowiest day
16.3 cm
4 March 1952
Sunniest day
14.0 h
27 May 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 | 9.1 °C | +3.5 °C | 4 mm | -22 mm |
| Feb | 9.2 °C | +1.5 °C | 8 mm | -27 mm |
| Mar | 16.1 °C | +3.1 °C | 44 mm | -10 mm |
| Apr | 24.2 °C | +4.7 °C | 21 mm | -47 mm |
| May | 26.9 °C | +2.1 °C | 54 mm | -37 mm |
| Jun | 30.2 °C | +1.5 °C | 264 mm | +119 mm |
| Jul | 34.1 °C | +3.3 °C | 60 mm | -213 mm |
| Aug | 32.6 °C | +2.0 °C | 255 mm | +96 mm |
| Sep | 27.5 °C | +1.2 °C | 172 mm | +57 mm |
| Oct | 21.7 °C | +0.4 °C | 78 mm | +29 mm |
| Nov | 17.1 °C | +2.3 °C | 9 mm | -30 mm |
| Dec | 10.9 °C | +2.9 °C | 10 mm | -13 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 Huai'an?
Huai'an has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 15.0 °C and it receives 1,078 mm of precipitation per year.
What is the hottest day ever recorded in Huai'an?
The hottest day measured in Huai'an between 1940 and 2025 was 11 August 1946, reaching 39.6 °C.
What is the coldest day in Huai'an?
The coldest day measured in Huai'an between 1940 and 2025 was 11 January 1955, at -20.0 °C.
Does it snow in Huai'an?
Yes. Huai'an gets on average 12.0 cm of snow per year and has around 62 frost days.
Has the climate of Huai'an warmed?
Yes: Huai'an warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Huai'an?
The wettest day measured in Huai'an between 1940 and 2025 was 5 July 2018, with 206 mm of rain in 24 hours.
What was the windiest day in Huai'an?
The windiest day measured in Huai'an between 1940 and 2025 was 2 August 1956, with winds reaching 45.0 km/h.
What is the warmest month in Huai'an?
The warmest month in Huai'an is July (27.5 °C on average); the coldest is January (1.2 °C).
How much does it rain in Huai'an?
Huai'an receives on average 1,078 mm of precipitation per year, spread over about 100 rainy days.
Is it sunny in Huai'an?
Huai'an gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Huai'an?
The heaviest 24-hour snowfall measured in Huai'an between 1940 and 2025 was 4 March 1952, with 16.3 cm.
Are there tropical nights in Huai'an?
Yes: Huai'an has on average 91 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Huai'an?
In Huai'an, between 1940 and 2025, the highest apparent temperature reached 46.4 °C on 6 July 2025, and the lowest was -25.0 °C on 11 January 1955.
Compare Huai'an with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Huai'an