Climate and monthly weather forecast
Suzhou, China

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The climate of Suzhou

Suzhou, situated in the eastern coastal province of Jiangsu, China, is governed predominantly by a humid subtropical climate (Cfa) according to the Köppen climate classification. The area experiences a wide range of weather conditions throughout the year with variations in temperature, rainfall, sunlight hours and wind speed.

Taking a comprehensive look at the provided data, temperatures vary noticeably, from a low of around 2.5°C (36.5°F) in January to a high of about 31.9°C (89.4°F) in August. Similarly, precipitation in Suzhou moves from a minimum rainfall value of 25mm (0.98") in October to a peak of 161mm (6.34") in July, indicating a predominance of summer rainfall. Also noteworthy are the periods, from May to September, when the city experiences its highest levels of humidity at above 68%.

Noticeably, there are shifts in the amount of sunlight received throughout the year; moving from a low of 10.1 hours in December to a maximum of 14.2 hours in June. Wind speeds in Suzhou tend to be relatively consistent, ranging from about 10.5km/h (6.5mph) to 12.7km/h (7.9mph). These wind speeds can increase when considering maximum wind speed and gusts, which peak at approximately 13.4km/h (8.3mph) and 18.3km/h (11.4mph) respectively.

While Suzhou does see some snowy days, these are primarily confined to the winter months of December and January, with January seeing the most snowfall at 27mm (1.06").

The best time to visit Suzhou

Considering the various climate parameters, the best time to visit Suzhou would be from late April to early June. During this period, the city experiences moderate temperatures ranging from 6.2°C (43.2°F) to 26.3°C (79.3°F) alongside manageable humidity levels. Visitors can also expect a more pleasant amount of sunlight with daylight hours averaging between 12.9 and 13.7 hours.

The worst time to visit Suzhou

The least favorable time to visit Suzhou would arguably be from mid-June to August when humidity peaks at 80 - 81%, and temperatures can soar up to 31.9°C (89.4°F). Moreover, this period sees the highest rainfall with it reaching up to 161mm (6.34") in July, meaning outdoor activities might be affected.

Spring weather in Suzhou

Spring in Suzhou, from March to May, sees temperatures begin to climb from 14.9°C (58.8°F) up to 26.3°C (79.3°F). Precipitation also rises during this period from 51mm (2.01") in March to 57mm (2.24") in May. Despite this increase in rainfall, these are the months when there is a significant increase in daylight hours with it extending from 12.0 to 13.7 hours.

Summer weather in Suzhou

During the summer months of June to August, Suzhou experiences its highest temperatures reaching from 28.7°C (83.7°F) to 31.9°C (89.4°F). Humidity and precipitation also peak during this period. Despite the heat and high humidity, these are the months with the most daylight hours, hitting the maximum at 14.2 hours in June.

Autumn weather in Suzhou

Autumn in Suzhou, from September to November, brings significant drops in temperature moving from 27.4°C (81.3°F) in September to 17.2°C (63°F) in November. Rainfall also decreases substantially from 68mm (2.68") in September to 40mm (1.57") in November. Despite the changes in temperature and precipitation, daylight hours reduce slowly from 12.4 hours in September to 10.6 hours in November.

Winter weather in Suzhou

Winter months in Suzhou, from December to February, present the lowest temperatures dropping to about 2.5°C (36.5°F) in January, which is generally the chilliest month. At this time, the city also experiences occasional snowfall, mostly confined to January, but not more than 27mm (1.06"). Notably, daylight hours during the winter are the fewest, reaching a low of 10.1 hours in December.

Weather in January

Beginning the year, Suzhou experiences a winter month with considerable susceptibility to snow, though temperatures don't often drop below freezing. The daily sunshine duration slightly surpasses half the daylight duration, providing adequate light for activities during the day. Weather in January »

Weather in February

February brings a slight, yet noticeable increase in overall temperatures than its predecessor as Suzhou approaches the end of winter. Sunshine duration remains consistent with January, though daylight hours experience a minor increase. Weather in February »

Weather in March

The arrival of spring in March is accompanied by a noticeable upsurge in temperature in Suzhou. The extra daylight hours allow more sunshine coverage, with the UV index stepping up. Snowfall during this month decreases significantly, with just 5mm (0.2") of snow occurrence. Weather in March »

Weather in April

April continues the warming trend, showcasing a significant leap to almost subtropical temperatures. The proportion of sunshine to daylight hours improves from March and the UV index escalates, signaling the need for sun protection. Weather in April »

Weather in May

May sees a major jump in temperature reaching up to 26.3°C (79.3°F), pushing Suzhou further into its warm, pleasant season. Consequently, rainfall increases presumably due to the warmer conditions which fuel cloud formation. The absence of snow continues from April through May. Weather in May »

Weather in June

June marks the onset of summer, bearing the highest relative humidity and significantly elevated rainfall of 137mm (5.39"). The consistently high temperatures and longer daylight hours remain typical features of the month. Snowfall remains absent throughout June as is the norm for summer months. Weather in June »

Weather in July

July arrives showcasing the warmest temperatures of the year, with a high averaging at 31.8°C (89.2°F). Suzhou experiences its maximum quantity of rainfall, a whopping 161mm (6.34"). A steady sunshine duration persists, remaining relatively unaffected by the increased cloud cover. Weather in July »

Weather in August

August follows suit with similar temperatures to July, keeping the heatwave in Suzhou going strong. The ample sunshine duration and continuous high UV index remind locals and tourists alike about the recommended application of SPF formulations. Weather in August »

Weather in September

September brings a visible drop in temperature as Suzhou transitions from summer to autumn. The shortening daylight hours announce the end of the sun's dominion, but a consistent sunshine duration persists. Rainfall drops to 68mm (2.68") in a swift departure from the summer monsoons. Weather in September »

Weather in October

October brings residents a relief from the extremes of Suzhou's weather. One witnesses a decrease in rainfall occurrences to a mere 9.4 days with lighter quantities of 25mm (0.98"). The city’s climate becomes more temperate, with the sun continuing to shine brightly for the larger part of the daylight hours. Weather in October »

Weather in November

Considerably cooler temperatures descend upon Suzhou in November, reminding residents of the impending winter. A visible increase in wind and gust speeds contribute to the shift in weather conditions. The cloud cover decreases but doesn't cause a significant interruption in the pleasant sunshine duration. Weather in November »

Weather in December

December rings in the onset of winter with temperatures ranging from 4.7°C (40.5°F) to 10.3°C (50.5°F). An onset of snowfall after 8 months is observable, commencing with a humble 8mm (0.31"). Sunshine remains accessible despite the seasonal shift, staying relatively on par with November. Weather in December »

Frequently asked questions

What time of the year is the coldest in Suzhou?

January, recording an average high temperature of 8.3°C (46.9°F) and a low temperature of 2.5°C (36.5°F), is Suzhou's coldest month.

How many days does it rain in Suzhou?

Throughout the year, in Suzhou, China, there are 166.5 rainfall days, and 811mm (31.93") of precipitation is accumulated.

When does it snow in Suzhou?

January through March and December are months with snowfall.

When does it snow the most in Suzhou?

January is the month with the most snowfall in Suzhou, China. Snow falls for 2.8 days and accumulates 27mm (1.06") of snow.

How much does it snow in Suzhou?

Throughout the year, in Suzhou, there are 5.7 snowfall days, and 62mm (2.44") of snow is accumulated.

What is the month with the least sunshine in Suzhou?

The month with the least sunshine is February, with an average of 4.8h of sunshine.

When it does not snow in Suzhou?

In Suzhou, China, snow does not fall in April through November.

When are the longest days in Suzhou?

The month with the longest days in Suzhou is June, with an average of 14h and 12min of daylight.

What are the months with the highest UV index in Suzhou?

The months with the highest UV index in Suzhou are June and July, with an average maximum UV index of 7.

What are the most humid months in Suzhou?

July and September, with an average relative humidity of 81%, are most humid months in Suzhou.

What is the wettest month in Suzhou?

July is the month with the most rainfall in Suzhou. Rain falls for 21.1 days and accumulates 161mm (6.34") of precipitation.

What time of the year is the hottest in Suzhou?

August is the warmest month of the year in Suzhou, China, registering average temperatures as high as 31.9°C (89.4°F) and as low as 24.8°C (76.6°F).

What month has the most sunshine in Suzhou?

August has the most sunshine of the year in Suzhou, China, with an average of 9.6h of sunshine.

What is the driest month in Suzhou?

The month with the least rainfall in Suzhou, China, is October, when the rain falls for 9.4 days and typically collects 25mm (0.98") of precipitation.

What is the least humid month in Suzhou?

With an average relative humidity of 65%, December is the least humid month in Suzhou, China.

What is the month with the shortest days in Suzhou?

With an average of 10h and 12min of daylight, December has the shortest days of the year in Suzhou, China.

Is there Daylight Saving Time (DST) in Suzhou?

Suzhou, China, does not utilize Daylight Saving Time (DST). CST timezone is used over the entire year.

When is the lowest UV index in Suzhou?

The month with the lowest UV index is December, with an average maximum UV index of 2.

Average temperature
Suzhou, China

Average temperature - Suzhou, China

The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.3°C).

The months with the highest average low temperature are July and August (24.8°C).
The coldest month (with the lowest average low temperature) is January (2.5°C).

Average pressure
Suzhou, China

Average pressure - Suzhou, China

The month with the highest atmospheric pressure is January (1027.3mbar).
The month with the lowest atmospheric pressure is July (1004.8mbar).

Average wind speed
Suzhou, China

Average wind speed - Suzhou, China

The windiest months (with the highest average wind speed) are February and December (12.7km/h).
The calmest months (with the lowest average wind speed) are July and September (10.5km/h).

Average humidity
Suzhou, China

Average humidity - Suzhou, China

The months with the highest relative humidity are July and September (81%).
The month with the lowest relative humidity is December (65%).

Average rainfall
Suzhou, China

Average rainfall - Suzhou, China

The wettest month (with the highest rainfall) is July (161mm).
The driest month (with the least rainfall) is October (25mm).

Average rainfall days
Suzhou, China

Average rainfall days - Suzhou, China

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is December (8.5 days).

Average snowfall
Suzhou, China

Average snowfall - Suzhou, China

The month with the highest snowfall is January (27mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days
Suzhou, China

Average snowfall days - Suzhou, China

The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight / Average sunshine
Suzhou, China

Average daylight / Average sunshine - Suzhou, China

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 12min).

The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days
Suzhou, China

Average sunshine days - Suzhou, China

The month with the most sunshine days is December (21.1 days).
The month with the least sunshine days is July (7.7 days).

Suzhou, China

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