Zhoushan climate — normals and trends
Zhoushan (China) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.0 °C and it receives 1,457 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 August (26.9 °C on average) and the coldest is February (7.2 °C). Rainfall peaks in June.
Zhoushan averages 1 frost days, 0 hot days (≥ 30 °C) and 130 rainy days per year.
Zhoushan has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 31.1 °C (on 15 July 1998) and the coldest -3.4 °C (on 24 January 2016).
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
ZhoushanZhejiang
- coords
- 29.99°, 122.20°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.0°C
Average daily high
17.8°C
Average daily low
16.1°C
Annual rainfall
1,457mm
Sunshine / day
7.9h
Mean relative humidity
81%
Average peak wind
29.4km/h
Seasonal range
19.7°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
130 d/yr
Annual snowfall
1.6 cm
Average feels-like high
17.6 °C
Average feels-like low
14.0 °C
Average peak gust
39.7 km/h
Tropical nights (≥ 20 °C)
138 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.28 · 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
31.1 °C
15 July 1998
Coldest day
-3.4 °C
24 January 2016
Wettest day
173 mm
26 September 1977
Windiest day
94.8 km/h
27 September 1983
Strongest gust
180.0 km/h
2 August 1956
Hottest feels-like
39.9 °C
7 August 2017
Coldest feels-like
-15.0 °C
24 January 2016
Snowiest day
7.5 cm
31 January 1979
Sunniest day
13.9 h
2 July 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 | 9.7 °C | +1.1 °C | 16 mm | -53 mm |
| Feb | 8.4 °C | +0.1 °C | 47 mm | -41 mm |
| Mar | 11.5 °C | +1.0 °C | 69 mm | -62 mm |
| Apr | 16.1 °C | +1.8 °C | 61 mm | -86 mm |
| May | 20.4 °C | +1.5 °C | 221 mm | +32 mm |
| Jun | 24.5 °C | +1.4 °C | 399 mm | +135 mm |
| Jul | 27.6 °C | +1.0 °C | 135 mm | +41 mm |
| Aug | 28.6 °C | +1.2 °C | 1 mm | -98 mm |
| Sep | 28.1 °C | +2.7 °C | 48 mm | -95 mm |
| Oct | 24.8 °C | +3.3 °C | 33 mm | -57 mm |
| Nov | 17.8 °C | +0.7 °C | 57 mm | -24 mm |
| Dec | 14.0 °C | +2.1 °C | 19 mm | -46 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 Zhoushan?
Zhoushan has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.0 °C and it receives 1,457 mm of precipitation per year.
What is the hottest day ever recorded in Zhoushan?
The hottest day measured in Zhoushan between 1940 and 2025 was 15 July 1998, reaching 31.1 °C.
What is the coldest day in Zhoushan?
The coldest day measured in Zhoushan between 1940 and 2025 was 24 January 2016, at -3.4 °C.
Does it snow in Zhoushan?
Yes. Zhoushan gets on average 1.6 cm of snow per year and has around 1 frost days.
Has the climate of Zhoushan warmed?
Yes: Zhoushan warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Zhoushan?
The wettest day measured in Zhoushan between 1940 and 2025 was 26 September 1977, with 173 mm of rain in 24 hours.
What was the windiest day in Zhoushan?
The windiest day measured in Zhoushan between 1940 and 2025 was 27 September 1983, with winds reaching 94.8 km/h.
What is the warmest month in Zhoushan?
The warmest month in Zhoushan is August (26.9 °C on average); the coldest is February (7.2 °C).
How much does it rain in Zhoushan?
Zhoushan receives on average 1,457 mm of precipitation per year, spread over about 130 rainy days.
Is it sunny in Zhoushan?
Zhoushan 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 Zhoushan?
The heaviest 24-hour snowfall measured in Zhoushan between 1940 and 2025 was 31 January 1979, with 7.5 cm.
Are there tropical nights in Zhoushan?
Yes: Zhoushan has on average 138 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Zhoushan?
In Zhoushan, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 7 August 2017, and the lowest was -15.0 °C on 24 January 2016.
Compare Zhoushan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Zhoushan