Dongtai climate — normals and trends
Dongtai (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.2 °C and it receives 1,235 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 (2.2 °C). Rainfall peaks in July.
Dongtai averages 59 frost days, 57 hot days (≥ 30 °C) and 112 rainy days per year.
Dongtai has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 71 to 47 per year over the period.
The hottest day of the period reached 40.9 °C (on 5 August 1946) and the coldest -15.2 °C (on 17 January 1945).
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
DongtaiJiangsu
- coords
- 32.85°, 120.31°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.2°C
Average daily high
19.7°C
Average daily low
11.1°C
Annual rainfall
1,235mm
Sunshine / day
8.0h
Mean relative humidity
75%
Average peak wind
15.7km/h
Seasonal range
25.3°C
Frost days (< 0 °C)
59 d/yr
Hot days (≥ 30 °C)
57 d/yr
Rainy days (≥ 1 mm)
112 d/yr
Annual snowfall
9.6 cm
Average feels-like high
19.6 °C
Average feels-like low
10.3 °C
Average peak gust
32.3 km/h
Tropical nights (≥ 20 °C)
89 d/yr
Solar radiation
14.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.35 · 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
40.9 °C
5 August 1946
Coldest day
-15.2 °C
17 January 1945
Wettest day
165 mm
25 June 1979
Windiest day
50.9 km/h
2 August 1956
Strongest gust
104.0 km/h
22 August 1951
Hottest feels-like
47.9 °C
1 August 2003
Coldest feels-like
-20.5 °C
17 January 1945
Snowiest day
16.6 cm
4 March 1952
Sunniest day
14.0 h
19 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 | 10.0 °C | +3.4 °C | 4 mm | -32 mm |
| Feb | 9.5 °C | +1.1 °C | 12 mm | -36 mm |
| Mar | 17.0 °C | +3.9 °C | 34 mm | -36 mm |
| Apr | 25.2 °C | +5.8 °C | 27 mm | -58 mm |
| May | 26.3 °C | +1.6 °C | 160 mm | +44 mm |
| Jun | 29.0 °C | +0.8 °C | 244 mm | +42 mm |
| Jul | 33.1 °C | +2.0 °C | 195 mm | -61 mm |
| Aug | 33.2 °C | +2.4 °C | 293 mm | +136 mm |
| Sep | 29.0 °C | +2.4 °C | 291 mm | +164 mm |
| Oct | 23.5 °C | +1.7 °C | 69 mm | +12 mm |
| Nov | 17.6 °C | +1.8 °C | 11 mm | -38 mm |
| Dec | 12.2 °C | +2.9 °C | 4 mm | -27 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 Dongtai?
Dongtai has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.2 °C and it receives 1,235 mm of precipitation per year.
What is the hottest day ever recorded in Dongtai?
The hottest day measured in Dongtai between 1940 and 2025 was 5 August 1946, reaching 40.9 °C.
What is the coldest day in Dongtai?
The coldest day measured in Dongtai between 1940 and 2025 was 17 January 1945, at -15.2 °C.
Does it snow in Dongtai?
Yes. Dongtai gets on average 9.6 cm of snow per year and has around 59 frost days.
Has the climate of Dongtai warmed?
Yes: Dongtai warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Dongtai?
The wettest day measured in Dongtai between 1940 and 2025 was 25 June 1979, with 165 mm of rain in 24 hours.
What was the windiest day in Dongtai?
The windiest day measured in Dongtai between 1940 and 2025 was 2 August 1956, with winds reaching 50.9 km/h.
What is the warmest month in Dongtai?
The warmest month in Dongtai is July (27.5 °C on average); the coldest is January (2.2 °C).
How much does it rain in Dongtai?
Dongtai receives on average 1,235 mm of precipitation per year, spread over about 112 rainy days.
Is it sunny in Dongtai?
Dongtai gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Dongtai?
The heaviest 24-hour snowfall measured in Dongtai between 1940 and 2025 was 4 March 1952, with 16.6 cm.
Are there tropical nights in Dongtai?
Yes: Dongtai has on average 89 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Dongtai?
In Dongtai, between 1940 and 2025, the highest apparent temperature reached 47.9 °C on 1 August 2003, and the lowest was -20.5 °C on 17 January 1945.
Compare Dongtai with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Dongtai