Jiangyan climate — normals and trends
Jiangyan (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 15.4 °C and it receives 1,265 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 (27.6 °C on average) and the coldest is January (2.4 °C). Rainfall peaks in July.
Jiangyan averages 56 frost days, 58 hot days (≥ 30 °C) and 115 rainy days per year.
Jiangyan has warmed by +1.5 °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 67 to 45 per year over the period.
The hottest day of the period reached 40.8 °C (on 5 August 1946) and the coldest -15.6 °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
JiangyanJiangsu
- coords
- 32.51°, 120.14°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.4°C
Average daily high
19.8°C
Average daily low
11.4°C
Annual rainfall
1,265mm
Sunshine / day
7.9h
Mean relative humidity
75%
Average peak wind
15.6km/h
Seasonal range
25.2°C
Frost days (< 0 °C)
56 d/yr
Hot days (≥ 30 °C)
58 d/yr
Rainy days (≥ 1 mm)
115 d/yr
Annual snowfall
10.1 cm
Average feels-like high
19.8 °C
Average feels-like low
10.6 °C
Average peak gust
32.1 km/h
Tropical nights (≥ 20 °C)
91 d/yr
Solar radiation
14.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.35 · 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
40.8 °C
5 August 1946
Coldest day
-15.6 °C
17 January 1945
Wettest day
169 mm
4 July 1983
Windiest day
50.4 km/h
22 August 1951
Strongest gust
97.9 km/h
22 August 1951
Hottest feels-like
48.0 °C
1 August 2003
Coldest feels-like
-20.9 °C
17 January 1945
Snowiest day
17.3 cm
18 January 1984
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 | 10.3 °C | +3.5 °C | 5 mm | -34 mm |
| Feb | 9.7 °C | +1.2 °C | 11 mm | -39 mm |
| Mar | 17.1 °C | +3.9 °C | 41 mm | -34 mm |
| Apr | 25.4 °C | +5.9 °C | 30 mm | -62 mm |
| May | 26.4 °C | +1.7 °C | 156 mm | +34 mm |
| Jun | 28.8 °C | +0.6 °C | 297 mm | +80 mm |
| Jul | 33.0 °C | +1.8 °C | 230 mm | -18 mm |
| Aug | 33.3 °C | +2.3 °C | 257 mm | +100 mm |
| Sep | 29.2 °C | +2.4 °C | 246 mm | +118 mm |
| Oct | 23.6 °C | +1.7 °C | 71 mm | +14 mm |
| Nov | 17.6 °C | +1.6 °C | 11 mm | -39 mm |
| Dec | 12.3 °C | +2.8 °C | 5 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 Jiangyan?
Jiangyan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 15.4 °C and it receives 1,265 mm of precipitation per year.
What is the hottest day ever recorded in Jiangyan?
The hottest day measured in Jiangyan between 1940 and 2025 was 5 August 1946, reaching 40.8 °C.
What is the coldest day in Jiangyan?
The coldest day measured in Jiangyan between 1940 and 2025 was 17 January 1945, at -15.6 °C.
Does it snow in Jiangyan?
Yes. Jiangyan gets on average 10.1 cm of snow per year and has around 56 frost days.
Has the climate of Jiangyan warmed?
Yes: Jiangyan warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jiangyan?
The wettest day measured in Jiangyan between 1940 and 2025 was 4 July 1983, with 169 mm of rain in 24 hours.
What was the windiest day in Jiangyan?
The windiest day measured in Jiangyan between 1940 and 2025 was 22 August 1951, with winds reaching 50.4 km/h.
What is the warmest month in Jiangyan?
The warmest month in Jiangyan is July (27.6 °C on average); the coldest is January (2.4 °C).
How much does it rain in Jiangyan?
Jiangyan receives on average 1,265 mm of precipitation per year, spread over about 115 rainy days.
Is it sunny in Jiangyan?
Jiangyan 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 Jiangyan?
The heaviest 24-hour snowfall measured in Jiangyan between 1940 and 2025 was 18 January 1984, with 17.3 cm.
Are there tropical nights in Jiangyan?
Yes: Jiangyan has on average 91 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jiangyan?
In Jiangyan, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 1 August 2003, and the lowest was -20.9 °C on 17 January 1945.
Compare Jiangyan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jiangyan