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Changshu, Jiangsu Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Changshu, Jiangsu?
Changshu, Jiangsu gets 1268 mm of precipitation a year over about 123 rainy days. July is the warmest month (average high 32°C) and January the coldest (average low 2°C).
Humid subtropical climate
Changshu, Jiangsu has hot summers and chilly winters. Daytime highs range from about 8°C in January to 32°C in July. August is usually the wettest month. The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 3° | 10° |
| Spring | Mar–May | 12° | 19° |
| Summer | Jun–Aug | 24° | 31° |
| Autumn | Sep–Nov | 16° | 23° |
How much rain does Changshu get?
Changshu gets 1268 mm of precipitation in an average year, spread over about 123 days with measurable rain. That is more rainy days than 68% of China.
August is the wettest month, with 214 mm. December is the driest, with 51 mm. June has the most rainy days, about 14.
The longest dry spell in the last five years lasted 26 days, to January 11, 2023.
From October 2025 to September 2026 Changshu got 303 mm of rain, against a normal of 1268 mm for those months. August 2026 had the most, with 181 mm.
Changshu weather by month
Changshu weather in January
In January, Changshu averages a high of 8°C and a low of 2°C. It gets 72 mm of precipitation over about 10 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The January record high is 23°C (2020) and the record low is -8°C (2021).
Changshu weather in February
In February, Changshu averages a high of 10°C and a low of 3°C. It gets 67 mm of precipitation over about 10 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The February record high is 27°C (1998) and the record low is -6°C (2018).
Changshu weather in March
In March, Changshu averages a high of 14°C and a low of 7°C. It gets 90 mm of precipitation over about 12 rainy days. Estimated sunshine is 36% of daylight hours, derived from ERA5 cloud cover. The March record high is 31°C (2013) and the record low is -3°C (2024).
Changshu weather in April
In April, Changshu averages a high of 20°C and a low of 12°C. It gets 80 mm of precipitation over about 11 rainy days. Estimated sunshine is 33% of daylight hours, derived from ERA5 cloud cover. The April record high is 34°C (2005) and the record low is 2°C (1991). April is one of the most comfortable months to visit.
Changshu weather in May
In May, Changshu averages a high of 25°C and a low of 17°C. It gets 93 mm of precipitation over about 11 rainy days. Estimated sunshine is 32% of daylight hours, derived from ERA5 cloud cover. The May record high is 35°C (2011) and the record low is 8°C (2019). May is one of the most comfortable months to visit.
Changshu weather in June
In June, Changshu averages a high of 28°C and a low of 22°C. It gets 206 mm of precipitation over about 14 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The June record high is 37°C (2006) and the record low is 14°C (2004).
Changshu weather in July
In July, Changshu averages a high of 32°C and a low of 26°C. It gets 146 mm of precipitation over about 11 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The July record high is 39°C (2022) and the record low is 17°C (2015).
Changshu weather in August
In August, Changshu averages a high of 32°C and a low of 26°C. It gets 214 mm of precipitation over about 12 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The August record high is 40°C (2022) and the record low is 18°C (2019).
Changshu weather in September
In September, Changshu averages a high of 28°C and a low of 22°C. It gets 116 mm of precipitation over about 10 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The September record high is 37°C (2003) and the record low is 14°C (1992).
Changshu weather in October
In October, Changshu averages a high of 23°C and a low of 17°C. It gets 75 mm of precipitation over about 7 rainy days. Estimated sunshine is 43% of daylight hours, derived from ERA5 cloud cover. The October record high is 37°C (2022) and the record low is 7°C (1993). October is one of the most comfortable months to visit.
Changshu weather in November
In November, Changshu averages a high of 17°C and a low of 11°C. It gets 59 mm of precipitation over about 9 rainy days. Estimated sunshine is 52% of daylight hours, derived from ERA5 cloud cover. The November record high is 29°C (2023) and the record low is -2°C (2015). November is one of the most comfortable months to visit.
Changshu weather in December
In December, Changshu averages a high of 11°C and a low of 4°C. It gets 51 mm of precipitation over about 8 rainy days. Estimated sunshine is 54% of daylight hours, derived from ERA5 cloud cover. The December record high is 24°C (2023) and the record low is -8°C (1991).
Sunshine, humidity and wind in Changshu
December is the sunniest month in Changshu, with estimated sunshine of 54% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 21%. The annual cloud-cover estimate is 38% of daylight hours; it is not a measurement of sunshine duration. Changshu is cloudier than 69% of China.
Humidity peaks in July at 80% and is lowest in December at 66%.
Changshu has about 41 days a year above 32°C. Changshu is hotter than 62% of China.
First and last freeze in Changshu
The first fall freeze in Changshu typically comes around December 9, and the last spring freeze around February 24. That leaves a frost-free growing season of about 288 days.
Changshu weather records
These records cover SHANGHAI during 1991–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Changshu station is 40°C, on August 19, 2022. The coldest is -8°C, on January 24, 2016.
The wettest day in the available station history brought 189 mm of precipitation, on October 7, 2013.
38 all-time records have been set at the station since 1991.
The best time to visit Changshu
The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.
Winter (December–February) is chilly, with average highs around 10°C and lows near 3°C.
Spring (March–May) is mild, with average highs around 20°C and lows near 12°C.
Summer (June–August) is hot, with average highs around 31°C and lows near 24°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 23°C and lows near 16°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 2° | 8° | 72 mm | 10 | 71% | 44% | 23° | -8° |
| February | 3° | 10° | 67 mm | 10 | 73% | 36% | 27° | -6° |
| March | 7° | 14° | 90 mm | 12 | 70% | 36% | 31° | -3° |
| April | 12° | 20° | 80 mm | 11 | 69% | 33% | 34° | 2° |
| May | 17° | 25° | 93 mm | 11 | 69% | 32% | 35° | 8° |
| June | 22° | 28° | 206 mm | 14 | 78% | 22% | 37° | 14° |
| July | 26° | 32° | 146 mm | 11 | 80% | 21% | 39° | 17° |
| August | 26° | 32° | 214 mm | 12 | 76% | 42% | 40° | 18° |
| September | 22° | 28° | 116 mm | 10 | 80% | 38% | 37° | 14° |
| October | 17° | 23° | 75 mm | 7 | 74% | 43% | 37° | 7° |
| November | 11° | 17° | 59 mm | 9 | 72% | 52% | 29° | -2° |
| December | 4° | 11° | 51 mm | 8 | 66% | 54% | 24° | -8° |
Station: SHANGHAI, 74 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1991–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Changshu climate questions
How much rain does Changshu get?
Changshu gets 1268 mm of precipitation in an average year, over about 123 rainy days.
What is the wettest month in Changshu?
August is the wettest month in Changshu, with 214 mm. December is the driest, with 51 mm.
How many rainy days does Changshu have a year?
Changshu has about 123 days with measurable rain in an average year. June has the most, about 14.
What is the hottest month in Changshu?
July is the warmest month in Changshu, with an average high of 32°C.
What is the coldest month in Changshu?
January is the coldest month in Changshu, with an average low of 2°C.
What is the record high temperature in Changshu?
Within the available 1991–2026 station history, the record high at the Changshu station is 40°C, set on August 19, 2022. The record low is -8°C, on January 24, 2016.
What is the sunniest month in Changshu?
December is the sunniest month in Changshu, with estimated sunshine of 54% of daylight hours from ERA5 cloud cover. July is the cloudiest.
When is the first frost in Changshu?
The first fall freeze in Changshu typically comes around December 9. The last spring freeze is around February 24.
What is the best time to visit Changshu?
The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 21°C.