Weather in Zhoushan

Stay up to date with the latest weather information in Zhoushan. In this section, you will find current reports, forecasts, and clear charts to help you plan your time.

The climate in Zhoushan can be characterized as humid subtropical, with four clearly defined seasons. The city enjoys mild and relatively humid weather year-round, making it attractive to visit during various periods. Temperature fluctuations throughout the year are noticeable, but without extreme peaks of heat or cold.

Summer in Zhoushan, especially from June to August, is warm and humid, with average temperatures reaching 28-29°C in July and August. June stands out as the month with the highest rainfall (10 mm) and the highest number of rainy days (17), indicating the peak of the wet season. Winters, from December to February, are cool but not freezing, with average temperatures around 8-10°C. Although rainfall is minimal in winter, rainy days still occur quite frequently.

Spring (March-May) and autumn (September-November) are transitional seasons with very comfortable weather. In spring, the temperature gradually rises from 11°C to 20°C, and in autumn, it smoothly decreases from 26°C to 17°C. These periods are characterized by moderate rainfall and pleasant sunny weather, making them the ideal time for exploring the city and its surroundings.

Zhoushan experiences a distinct annual temperature progression, characteristic of its subtropical marine climate. The hottest month is typically August, when the average air temperature reaches 28.6°C, and daytime highs often rise to 30.0°C. July is also very warm, with an average temperature of 27.9°C. On the other hand, the coldest month is usually January, where the average temperature is around 7.9°C, and nighttime lows can drop to 6.3°C.

The summer period in Zhoushan, covering June, July, and August, is characterized by warm and occasionally hot weather. In June, the average temperature holds at 23.8°C, gradually increasing to peak values in July and August. Maximum daytime temperatures in summer consistently stay within the 25-30°C range. Given the city's coastal location and high humidity, especially in early summer (June being the month with the most precipitation), the summer weather can feel quite sultry and humid.

Winters in Zhoushan are mild and cool, without severe frosts. From December to February, average temperatures fluctuate between 7.9°C (in January) and 10.2°C (in December). Nighttime temperatures in the coldest months rarely drop significantly below 6-7°C, while daytime temperatures usually rise to 9-12°C. Notably, throughout the year, the difference between daytime maximum and nighttime minimum temperatures in Zhoushan is relatively small, most often around 2-3°C. This indicates the moderating influence of the sea and the absence of sharp daily temperature changes.

In Zhoushan, precipitation falls throughout the year, although its intensity and frequency vary noticeably depending on the season. The city does not have a clearly defined dry season, but periods with more or less rain can be distinguished. Overall, the climate here is quite humid, and even in the "driest" months, the chance of rain remains.

The wettest period in Zhoushan is early summer. June stands out as the absolute leader in rainfall, reaching 10 mm, and in the number of rainy days – averaging 17 days per month. This indicates the peak of the rainy season. It is also worth noting May and September, when precipitation amounts to 6 mm, and the number of rainy days reaches 13 and 15 respectively. These months frame the main wet season, bringing frequent, though not always heavy, rains.

The "driest" months in terms of rainfall are January and December, with only 2 mm falling in each. However, December is also characterized by the fewest rainy days – averaging 8. August and November are also relatively dry, with 3 mm of precipitation. It is important to understand that even during these periods, rain is not a rarity; it is simply usually less abundant and may take the form of drizzle. For example, in January, despite the low amount of precipitation, there are about 11 days with rain, which speaks to frequent but insignificant precipitation.

When planning a trip to Zhoushan, it is important to choose your wardrobe correctly to feel comfortable in any weather. Given the humid subtropical climate and frequent precipitation throughout the year, a waterproof jacket or a quality umbrella will become your indispensable companions. Don't forget comfortable walking shoes, as you will surely want to explore the city and its surroundings. The principle of layering clothing is an excellent strategy for Zhoushan, allowing you to easily adapt to temperature changes during the day.

In the summer months, from June to August, when Zhoushan is warm and humid (average temperature around 24-29°C), opt for light and breathable clothing made from natural fabrics. T-shirts, shorts, sundresses, as well as a hat and sunscreen will help you comfortably endure the heat. June is the rainiest month, so a light raincoat will be especially relevant. In the other summer months, precipitation is also likely but less intense. In spring (March-May) and autumn (September-October), the weather is very pleasant but changeable. Bring both light items and something warmer for the evening – for example, a sweater or fleece jacket, as well as a light jacket in case of rain.

In winter, from December to February, Zhoushan is cool, with average temperatures hovering around 8-10°C. Although there are no severe frosts, you will need warm clothing: sweaters, warm trousers, and a jacket (preferably windproof and waterproof, as even with a small amount of precipitation, there are quite a few rainy days). A scarf, hat, and gloves may also come in handy, especially in January, the coldest month. Regardless of the season, remember the humidity – clothes may take longer than usual to dry, so a few spare sets will not go amiss.