Zhoushan climate
Zhoushan (Zhejiang, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 18 °C64 °F, and about 1,523 mm60 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Zhoushan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 1049 | 846 | 947 | 823.2 |
| Feb | 1050 | 846 | 948 | 853.4 |
| Mar | 1253 | 1049 | 1151 | 1234.8 |
| Apr | 1560 | 1356 | 1458 | 1265.0 |
| May | 2068 | 1865 | 1967 | 1566.2 |
| Jun | 2475 | 2272 | 2373 | 25510 |
| Jul | 2781 | 2679 | 2780 | 1355.3 |
| Aug | 2883 | 2781 | 2882 | 1455.7 |
| Sep | 2679 | 2576 | 2578 | 1495.8 |
| Oct | 2272 | 2169 | 2271 | 903.5 |
| Nov | 1865 | 1661 | 1763 | 923.6 |
| Dec | 1355 | 1151 | 1253 | 853.3 |
| Year | 2883 | 846 | 1864 | 1,52360 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 78% | 72% | 2.1 | 10:25 |
| Feb | 81% | 73% | 2.5 | 11:05 |
| Mar | 82% | 71% | 3.5 | 11:55 |
| Apr | 85% | 72% | 4.1 | 12:52 |
| May | 87% | 75% | 4.4 | 13:39 |
| Jun | 91% | 82% | 4.3 | 14:04 |
| Jul | 91% | 60% | 5.9 | 13:54 |
| Aug | 87% | 52% | 5.5 | 13:13 |
| Sep | 81% | 60% | 4.3 | 12:18 |
| Oct | 75% | 59% | 3.6 | 11:23 |
| Nov | 76% | 67% | 2.4 | 10:36 |
| Dec | 75% | 66% | 2.1 | 10:13 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Zhoushan is like
The warmest month is August, with an average high of 28 °C83 °F and a low of 27 °C81 °F. The coldest is January, when highs average 10 °C49 °F and lows 8 °C46 °F. Seasons are strongly marked: the warmest month is on average 19 °C34.3 °F warmer than the coldest.
It is wet, with about 1,523 mm60 in of precipitation per year. The wettest three-month stretch is May–July, which brings 36% of the annual total. The wettest month is June (255 mm10 in), the driest is January (82 mm3.2 in).
Relative humidity ranges from 75% in October to 91% in July. The clearest skies (lowest average cloud amount, 52%) are typical of August. Average wind speed near the ground ranges from 15 km/h (9 mph) in June to 21 km/h (13 mph) in December. Daylight lasts from about 10.2 hours in December to 14.1 hours in June.
Best time to visit Zhoushan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October: average highs of 22 °C72 °F to 22 °C72 °F with 90 mm3.5 in to 90 mm3.5 in of precipitation per month.
The most challenging month is June, which is very wet (255 mm10 in).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Zhoushan
- Winter (December–February) — highs 1049 to 13 °C55 °F, lows 846 to 11 °C51 °F, about 84 mm3.3 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1253 to 20 °C68 °F, lows 1049 to 18 °C65 °F, about 135 mm5.3 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an umbrella or light rain jacket.
- Summer (June–August) — highs 2475 to 28 °C83 °F, lows 2272 to 27 °C81 °F, about 178 mm7.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1865 to 26 °C79 °F, lows 1661 to 25 °C76 °F, about 110 mm4.3 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Zhoushan compares
Compared with Ningbo, about 64 km to the west, Zhoushan is on average 0.6 °C1.2 °F warmer and receives 6% more precipitation (1,523 mm60 in vs 1,442 mm57 in). The difference is largest in December (4.2 °C7.6 °F warmer).
Of the 547 places in China covered by World Climates, Zhoushan is the 148th warmest by annual mean temperature and the 98th wettest by annual precipitation. See all of them on the China climate page.
Places in other countries with the most similar temperature and rainfall pattern: Minato (Japan, Cfa), Hamamatsu (Japan, Cfa) and Fuji (Japan, Cfa).
Nearby places
- Ningbo 64 km · 17 °C63 °F · 1,442 mm57 in
- Cixi 95 km · 17 °C63 °F · 1,442 mm57 in
- Fengxiang 120 km · 17 °C62 °F · 1,286 mm51 in
- Lianghu 126 km · 17 °C63 °F · 1,460 mm57 in
- Shanghai 155 km · 17 °C62 °F · 1,286 mm51 in
- Shaoxing 157 km · 17 °C63 °F · 1,460 mm57 in
- Jiaxing 163 km · 17 °C62 °F · 1,316 mm52 in
- Taizhou 165 km · 18 °C65 °F · 1,547 mm61 in
Frequently asked questions
What is the warmest month in Zhoushan?
August is the warmest month in Zhoushan, with an average high of 28 °C (83 °F) and an average low of 27 °C (81 °F).
What is the coldest month in Zhoushan?
January is the coldest month, with an average high of 10 °C (49 °F) and an average low of 8 °C (46 °F).
When does it rain the most in Zhoushan?
June is the wettest month with about 255 mm (10.0 in) of precipitation; January is the driest with about 82 mm (3.2 in).
What is the best time to visit Zhoushan?
Judging by long-term averages, the most comfortable months are October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.