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Jianchang, Jiangxi Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Jianchang, Jiangxi?
Jianchang, Jiangxi gets 1853 mm of precipitation a year over about 151 rainy days. July is the warmest month (average high 34°C) and January the coldest (average low 3°C).
Humid subtropical climate
Jianchang, Jiangxi has hot summers and chilly winters. Daytime highs range from about 10°C in January to 34°C in July. June is usually the wettest month. The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 4° | 12° |
| Spring | Mar–May | 15° | 23° |
| Summer | Jun–Aug | 24° | 33° |
| Autumn | Sep–Nov | 16° | 24° |
How much rain does Jianchang get?
Jianchang gets 1853 mm of precipitation in an average year, spread over about 151 days with measurable rain. That is more rainy days than 91% of China.
June is the wettest month, with 344 mm. October is the driest, with 58 mm. March has the most rainy days, about 18.
The longest dry spell in the last five years lasted 27 days, to October 8, 2022.
From October 2025 to September 2026 Jianchang got 1098 mm of rain, against a normal of 1853 mm for those months. July 2026 had the most, with 387 mm.
Jianchang weather by month
Jianchang weather in January
In January, Jianchang averages a high of 10°C and a low of 3°C. It gets 84 mm of precipitation over about 13 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The January record high is 28°C (2008) and the record low is -6°C (2009).
Jianchang weather in February
In February, Jianchang averages a high of 13°C and a low of 6°C. It gets 103 mm of precipitation over about 13 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The February record high is 30°C (1979) and the record low is -7°C (1979).
Jianchang weather in March
In March, Jianchang averages a high of 17°C and a low of 9°C. It gets 209 mm of precipitation over about 18 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The March record high is 32°C (2025) and the record low is -3°C (1986). March is one of the most comfortable months to visit.
Jianchang weather in April
In April, Jianchang averages a high of 23°C and a low of 15°C. It gets 224 mm of precipitation over about 17 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The April record high is 35°C (1987) and the record low is 3°C (1991). April is one of the most comfortable months to visit.
Jianchang weather in May
In May, Jianchang averages a high of 28°C and a low of 19°C. It gets 261 mm of precipitation over about 17 rainy days. Estimated sunshine is 21% of daylight hours, derived from ERA5 cloud cover. The May record high is 38°C (2023) and the record low is 10°C (1983).
Jianchang weather in June
In June, Jianchang averages a high of 31°C and a low of 23°C. It gets 344 mm of precipitation over about 16 rainy days. Estimated sunshine is 11% of daylight hours, derived from ERA5 cloud cover. The June record high is 38°C (2009) and the record low is 14°C (1987).
Jianchang weather in July
In July, Jianchang averages a high of 34°C and a low of 26°C. It gets 186 mm of precipitation over about 10 rainy days. Estimated sunshine is 26% of daylight hours, derived from ERA5 cloud cover. The July record high is 41°C (2022) and the record low is 19°C (2009).
Jianchang weather in August
In August, Jianchang averages a high of 33°C and a low of 25°C. It gets 135 mm of precipitation over about 12 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The August record high is 41°C (2003) and the record low is 18°C (1974).
Jianchang weather in September
In September, Jianchang averages a high of 30°C and a low of 22°C. It gets 91 mm of precipitation over about 9 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The September record high is 38°C (2024) and the record low is 12°C (1970).
Jianchang weather in October
In October, Jianchang averages a high of 25°C and a low of 16°C. It gets 58 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 39°C (2022) and the record low is 2°C (1978). October is one of the most comfortable months to visit.
Jianchang weather in November
In November, Jianchang averages a high of 19°C and a low of 11°C. It gets 90 mm of precipitation over about 10 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The November record high is 33°C (2013) and the record low is -2°C (1979). November is one of the most comfortable months to visit.
Jianchang weather in December
In December, Jianchang averages a high of 13°C and a low of 5°C. It gets 68 mm of precipitation over about 10 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The December record high is 27°C (2018) and the record low is -11°C (1991).
Sunshine, humidity and wind in Jianchang
September is the sunniest month in Jianchang, with estimated sunshine of 46% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 11%. The annual cloud-cover estimate is 33% of daylight hours; it is not a measurement of sunshine duration. Jianchang is cloudier than 84% of China.
Humidity peaks in June at 80% and is lowest in July at 66%.
Jianchang has about 73 days a year above 32°C. Jianchang is hotter than 89% of China.
First and last freeze in Jianchang
The first fall freeze in Jianchang typically comes around December 14, and the last spring freeze around February 7. That leaves a frost-free growing season of about 310 days.
Jianchang weather records
These records cover NANCHENG during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Jianchang station is 41°C, on July 25, 2022. The coldest is -11°C, on December 29, 1991.
The wettest day in the available station history brought 234 mm of precipitation, on May 5, 2023.
46 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 Jianchang
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 21°C.
Winter (December–February) is chilly, with average highs around 12°C and lows near 5°C.
Spring (March–May) is warm, with average highs around 23°C and lows near 15°C.
Summer (June–August) is hot, with average highs around 33°C and lows near 25°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 25°C and lows near 16°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 3° | 10° | 84 mm | 13 | 75% | 40% | 28° | -6° |
| February | 6° | 13° | 103 mm | 13 | 79% | 29% | 30° | -7° |
| March | 9° | 17° | 209 mm | 18 | 78% | 28% | 32° | -3° |
| April | 15° | 23° | 224 mm | 17 | 77% | 28% | 35° | 3° |
| May | 19° | 28° | 261 mm | 17 | 77% | 21% | 38° | 10° |
| June | 23° | 31° | 344 mm | 16 | 80% | 11% | 38° | 14° |
| July | 26° | 34° | 186 mm | 10 | 66% | 26% | 41° | 19° |
| August | 25° | 33° | 135 mm | 12 | 69% | 35% | 41° | 18° |
| September | 22° | 30° | 91 mm | 9 | 68% | 46% | 38° | 12° |
| October | 16° | 25° | 58 mm | 7 | 69% | 43% | 39° | 2° |
| November | 11° | 19° | 90 mm | 10 | 74% | 44% | 33° | -2° |
| December | 5° | 13° | 68 mm | 10 | 71% | 46% | 27° | -11° |
Station: NANCHENG, 3 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.
Jianchang climate questions
How much rain does Jianchang get?
Jianchang gets 1853 mm of precipitation in an average year, over about 151 rainy days.
What is the wettest month in Jianchang?
June is the wettest month in Jianchang, with 344 mm. October is the driest, with 58 mm.
How many rainy days does Jianchang have a year?
Jianchang has about 151 days with measurable rain in an average year. March has the most, about 18.
What is the hottest month in Jianchang?
July is the warmest month in Jianchang, with an average high of 34°C.
What is the coldest month in Jianchang?
January is the coldest month in Jianchang, with an average low of 3°C.
What is the record high temperature in Jianchang?
Within the available 1970–2026 station history, the record high at the Jianchang station is 41°C, set on July 25, 2022. The record low is -11°C, on December 29, 1991.
What is the sunniest month in Jianchang?
September is the sunniest month in Jianchang, with estimated sunshine of 46% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Jianchang?
The first fall freeze in Jianchang typically comes around December 14. The last spring freeze is around February 7.
What is the best time to visit Jianchang?
The most comfortable time to visit is typically March to April and October to November, when daytime highs sit near 21°C.