Jiashan climate — normals and trends
Jiashan (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 16.8 °C and it receives 1,404 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 (28.7 °C on average) and the coldest is January (4.7 °C). Rainfall peaks in June.
Jiashan averages 23 frost days, 63 hot days (≥ 30 °C) and 129 rainy days per year.
Jiashan has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 32 to 14 per year over the period.
The hottest day of the period reached 40.5 °C (on 7 August 2013) and the coldest -8.8 °C (on 30 January 2018).
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
JiashanZhejiang
- coords
- 30.85°, 120.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.8°C
Average daily high
20.3°C
Average daily low
13.8°C
Annual rainfall
1,404mm
Sunshine / day
7.9h
Mean relative humidity
77%
Average peak wind
16.9km/h
Seasonal range
24.0°C
Frost days (< 0 °C)
23 d/yr
Hot days (≥ 30 °C)
63 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
7.2 cm
Average feels-like high
20.8 °C
Average feels-like low
13.4 °C
Average peak gust
33.7 km/h
Tropical nights (≥ 20 °C)
114 d/yr
Solar radiation
14.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.46 · 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
40.5 °C
7 August 2013
Coldest day
-8.8 °C
30 January 2018
Wettest day
170 mm
6 August 2005
Windiest day
62.9 km/h
6 August 2005
Strongest gust
151.6 km/h
2 August 1956
Hottest feels-like
47.9 °C
3 August 2024
Coldest feels-like
-14.8 °C
24 January 2016
Snowiest day
13.9 cm
17 February 1964
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 | 11.2 °C | +3.2 °C | 14 mm | -42 mm |
| Feb | 9.7 °C | +0.4 °C | 34 mm | -41 mm |
| Mar | 17.2 °C | +3.7 °C | 76 mm | -34 mm |
| Apr | 23.9 °C | +4.7 °C | 79 mm | -53 mm |
| May | 26.4 °C | +2.5 °C | 158 mm | -14 mm |
| Jun | 29.4 °C | +2.0 °C | 416 mm | +130 mm |
| Jul | 32.7 °C | +0.6 °C | 224 mm | +70 mm |
| Aug | 35.0 °C | +3.3 °C | 65 mm | -61 mm |
| Sep | 32.2 °C | +4.6 °C | 105 mm | -24 mm |
| Oct | 26.2 °C | +3.7 °C | 40 mm | -26 mm |
| Nov | 18.3 °C | +1.3 °C | 24 mm | -31 mm |
| Dec | 14.4 °C | +3.6 °C | 11 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 Jiashan?
Jiashan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 16.8 °C and it receives 1,404 mm of precipitation per year.
What is the hottest day ever recorded in Jiashan?
The hottest day measured in Jiashan between 1940 and 2025 was 7 August 2013, reaching 40.5 °C.
What is the coldest day in Jiashan?
The coldest day measured in Jiashan between 1940 and 2025 was 30 January 2018, at -8.8 °C.
Does it snow in Jiashan?
Yes. Jiashan gets on average 7.2 cm of snow per year and has around 23 frost days.
Has the climate of Jiashan warmed?
Yes: Jiashan warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jiashan?
The wettest day measured in Jiashan between 1940 and 2025 was 6 August 2005, with 170 mm of rain in 24 hours.
What was the windiest day in Jiashan?
The windiest day measured in Jiashan between 1940 and 2025 was 6 August 2005, with winds reaching 62.9 km/h.
What is the warmest month in Jiashan?
The warmest month in Jiashan is July (28.7 °C on average); the coldest is January (4.7 °C).
How much does it rain in Jiashan?
Jiashan receives on average 1,404 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Jiashan?
Jiashan 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 Jiashan?
The heaviest 24-hour snowfall measured in Jiashan between 1940 and 2025 was 17 February 1964, with 13.9 cm.
Are there tropical nights in Jiashan?
Yes: Jiashan has on average 114 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jiashan?
In Jiashan, between 1940 and 2025, the highest apparent temperature reached 47.9 °C on 3 August 2024, and the lowest was -14.8 °C on 24 January 2016.
Compare Jiashan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jiashan