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Rugao, 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 Rugao, Jiangsu?
Rugao, Jiangsu gets 1130 mm of precipitation a year over about 106 rainy days. July is the warmest month (average high 31°C) and January the coldest (average low -1°C).
Humid subtropical climate
Rugao, Jiangsu has hot summers and chilly winters. Daytime highs range from about 7°C in January to 31°C in July. July is usually the wettest month. The most comfortable time to visit is typically April to May and October, when daytime highs sit near 23°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 0° | 8° |
| Spring | Mar–May | 10° | 19° |
| Summer | Jun–Aug | 23° | 30° |
| Autumn | Sep–Nov | 13° | 22° |
How much rain does Rugao get?
Rugao gets 1130 mm of precipitation in an average year, spread over about 106 days with measurable rain. That is more rainy days than 56% of China.
July is the wettest month, with 244 mm. December is the driest, with 34 mm. July has the most rainy days, about 13.
The longest dry spell in the last five years lasted 36 days, to June 3, 2022.
From October 2025 to September 2026 Rugao got 435 mm of rain, against a normal of 1130 mm for those months. July 2026 had the most, with 293 mm.
Rugao weather by month
Rugao weather in January
In January, Rugao averages a high of 7°C and a low of -1°C. It gets 47 mm of precipitation over about 8 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The January record high is 20°C (2010) and the record low is -11°C (1984).
Rugao weather in February
In February, Rugao averages a high of 9°C and a low of 1°C. It gets 39 mm of precipitation over about 8 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The February record high is 26°C (1987) and the record low is -9°C (1990).
Rugao weather in March
In March, Rugao averages a high of 13°C and a low of 4°C. It gets 68 mm of precipitation over about 9 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 31°C (2025) and the record low is -6°C (1988).
Rugao weather in April
In April, Rugao averages a high of 20°C and a low of 9°C. It gets 66 mm of precipitation over about 8 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The April record high is 32°C (1978) and the record low is -2°C (1972). April is one of the most comfortable months to visit.
Rugao weather in May
In May, Rugao averages a high of 26°C and a low of 16°C. It gets 91 mm of precipitation over about 10 rainy days. Estimated sunshine is 34% of daylight hours, derived from ERA5 cloud cover. The May record high is 37°C (2014) and the record low is 5°C (1984). May is one of the most comfortable months to visit.
Rugao weather in June
In June, Rugao averages a high of 28°C and a low of 21°C. It gets 158 mm of precipitation over about 10 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The June record high is 37°C (2006) and the record low is 12°C (1981).
Rugao weather in July
In July, Rugao averages a high of 31°C and a low of 24°C. It gets 244 mm of precipitation over about 13 rainy days. Estimated sunshine is 22% of daylight hours, derived from ERA5 cloud cover. The July record high is 38°C (1978) and the record low is 16°C (1976).
Rugao weather in August
In August, Rugao averages a high of 31°C and a low of 24°C. It gets 180 mm of precipitation over about 12 rainy days. Estimated sunshine is 41% of daylight hours, derived from ERA5 cloud cover. The August record high is 39°C (2003) and the record low is 17°C (1974).
Rugao weather in September
In September, Rugao averages a high of 27°C and a low of 19°C. It gets 92 mm of precipitation over about 8 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The September record high is 36°C (1995) and the record low is 10°C (1972).
Rugao weather in October
In October, Rugao averages a high of 22°C and a low of 13°C. It gets 53 mm of precipitation over about 7 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The October record high is 36°C (2022) and the record low is 2°C (1973). October is one of the most comfortable months to visit.
Rugao weather in November
In November, Rugao averages a high of 16°C and a low of 7°C. It gets 57 mm of precipitation over about 8 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 -6°C (2015).
Rugao weather in December
In December, Rugao averages a high of 9°C and a low of 1°C. It gets 34 mm of precipitation over about 6 rainy days. Estimated sunshine is 55% of daylight hours, derived from ERA5 cloud cover. The December record high is 23°C (2023) and the record low is -10°C (1973).
Sunshine, humidity and wind in Rugao
December is the sunniest month in Rugao, with estimated sunshine of 55% of daylight hours from ERA5 cloud cover. July is the cloudiest, at 22%. The annual cloud-cover estimate is 39% of daylight hours; it is not a measurement of sunshine duration. Rugao is cloudier than 67% of China.
Humidity peaks in July at 82% and is lowest in December at 65%.
Rugao has about 32 days a year above 32°C. Rugao is hotter than 53% of China.
First and last freeze in Rugao
The first fall freeze in Rugao typically comes around November 28, and the last spring freeze around March 14. That leaves a frost-free growing season of about 259 days.
Rugao weather records
These records cover DONGTAI during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Rugao station is 39°C, on August 2, 2003. The coldest is -11°C, on January 23, 1984.
The wettest day in the available station history brought 321 mm of precipitation, on August 10, 2015.
40 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.4°C per decade since 1970.
The best time to visit Rugao
The most comfortable time to visit is typically April to May and October, when daytime highs sit near 23°C.
Winter (December–February) is chilly, with average highs around 8°C and lows near 0°C.
Spring (March–May) is mild, with average highs around 20°C and lows near 10°C.
Summer (June–August) is hot, with average highs around 30°C and lows near 23°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 22°C and lows near 13°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -1° | 7° | 47 mm | 8 | 71% | 44% | 20° | -11° |
| February | 1° | 9° | 39 mm | 8 | 72% | 38% | 26° | -9° |
| March | 4° | 13° | 68 mm | 9 | 69% | 37% | 31° | -6° |
| April | 9° | 20° | 66 mm | 8 | 68% | 34% | 32° | -2° |
| May | 16° | 26° | 91 mm | 10 | 69% | 34% | 37° | 5° |
| June | 21° | 28° | 158 mm | 10 | 76% | 24% | 37° | 12° |
| July | 24° | 31° | 244 mm | 13 | 82% | 22% | 38° | 16° |
| August | 24° | 31° | 180 mm | 12 | 78% | 41% | 39° | 17° |
| September | 19° | 27° | 92 mm | 8 | 80% | 38% | 36° | 10° |
| October | 13° | 22° | 53 mm | 7 | 74% | 44% | 36° | 2° |
| November | 7° | 16° | 57 mm | 8 | 72% | 52% | 29° | -6° |
| December | 1° | 9° | 34 mm | 6 | 65% | 55% | 23° | -10° |
Station: DONGTAI, 60 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; 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.
Rugao climate questions
How much rain does Rugao get?
Rugao gets 1130 mm of precipitation in an average year, over about 106 rainy days.
What is the wettest month in Rugao?
July is the wettest month in Rugao, with 244 mm. December is the driest, with 34 mm.
How many rainy days does Rugao have a year?
Rugao has about 106 days with measurable rain in an average year. July has the most, about 13.
What is the hottest month in Rugao?
July is the warmest month in Rugao, with an average high of 31°C.
What is the coldest month in Rugao?
January is the coldest month in Rugao, with an average low of -1°C.
What is the record high temperature in Rugao?
Within the available 1970–2026 station history, the record high at the Rugao station is 39°C, set on August 2, 2003. The record low is -11°C, on January 23, 1984.
What is the sunniest month in Rugao?
December is the sunniest month in Rugao, with estimated sunshine of 55% of daylight hours from ERA5 cloud cover. July is the cloudiest.
When is the first frost in Rugao?
The first fall freeze in Rugao typically comes around November 28. The last spring freeze is around March 14.
What is the best time to visit Rugao?
The most comfortable time to visit is typically April to May and October, when daytime highs sit near 23°C.