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Heshan, Hunan Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Heshan, Hunan?
Heshan, Hunan gets 1501 mm of precipitation a year over about 148 rainy days. July is the warmest month (average high 33°C) and January the coldest (average low 3°C).
Humid subtropical climate
Heshan, Hunan has hot summers and chilly winters. Daytime highs range from about 9°C in January to 34°C in July. June is usually the wettest month. The most comfortable time to visit is typically April and October to November, when daytime highs sit near 21°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 4° | 11° |
| Spring | Mar–May | 14° | 22° |
| Summer | Jun–Aug | 24° | 32° |
| Autumn | Sep–Nov | 16° | 23° |
How much rain does Heshan get?
Heshan gets 1501 mm of precipitation in an average year, spread over about 148 days with measurable rain. That is more rainy days than 88% of China.
June is the wettest month, with 236 mm. December is the driest, with 55 mm. March has the most rainy days, about 18.
The longest dry spell in the last five years lasted 24 days, to July 26, 2024.
From October 2025 to September 2026 Heshan got 507 mm of rain, against a normal of 1501 mm for those months. July 2026 had the most, with 271 mm.
Heshan weather by month
Heshan weather in January
In January, Heshan averages a high of 9°C and a low of 3°C. It gets 76 mm of precipitation over about 13 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The January record high is 27°C (2014) and the record low is -7°C (2016).
Heshan weather in February
In February, Heshan averages a high of 12°C and a low of 5°C. It gets 87 mm of precipitation over about 13 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The February record high is 31°C (2010) and the record low is -8°C (1990).
Heshan weather in March
In March, Heshan averages a high of 16°C and a low of 9°C. It gets 156 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 33°C (2025) and the record low is -1°C (2003).
Heshan weather in April
In April, Heshan averages a high of 22°C and a low of 14°C. It gets 178 mm of precipitation over about 16 rainy days. Estimated sunshine is 28% of daylight hours, derived from ERA5 cloud cover. The April record high is 36°C (2004) and the record low is 2°C (1996). April is one of the most comfortable months to visit.
Heshan weather in May
In May, Heshan averages a high of 27°C and a low of 19°C. It gets 208 mm of precipitation over about 16 rainy days. Estimated sunshine is 27% of daylight hours, derived from ERA5 cloud cover. The May record high is 36°C (1991) and the record low is 11°C (1991).
Heshan weather in June
In June, Heshan averages a high of 30°C and a low of 23°C. It gets 236 mm of precipitation over about 14 rainy days. Estimated sunshine is 17% of daylight hours, derived from ERA5 cloud cover. The June record high is 38°C (2004) and the record low is 13°C (1987).
Heshan weather in July
In July, Heshan averages a high of 33°C and a low of 26°C. It gets 166 mm of precipitation over about 10 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The July record high is 41°C (2024) and the record low is 19°C (1989).
Heshan weather in August
In August, Heshan averages a high of 33°C and a low of 25°C. It gets 112 mm of precipitation over about 10 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The August record high is 41°C (2003) and the record low is 17°C (2009).
Heshan weather in September
In September, Heshan averages a high of 28°C and a low of 21°C. It gets 87 mm of precipitation over about 9 rainy days. Estimated sunshine is 44% of daylight hours, derived from ERA5 cloud cover. The September record high is 39°C (2024) and the record low is 12°C (1992).
Heshan weather in October
In October, Heshan averages a high of 23°C and a low of 16°C. It gets 61 mm of precipitation over about 9 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The October record high is 38°C (2022) and the record low is 5°C (1991). October is one of the most comfortable months to visit.
Heshan weather in November
In November, Heshan averages a high of 18°C and a low of 10°C. It gets 79 mm of precipitation over about 10 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The November record high is 33°C (2022) and the record low is -2°C (1987). November is one of the most comfortable months to visit.
Heshan weather in December
In December, Heshan averages a high of 12°C and a low of 4°C. It gets 55 mm of precipitation over about 10 rainy days. Estimated sunshine is 50% of daylight hours, derived from ERA5 cloud cover. The December record high is 24°C (2024) and the record low is -11°C (1991).
Sunshine, humidity and wind in Heshan
December is the sunniest month in Heshan, with estimated sunshine of 50% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 17%. The annual cloud-cover estimate is 34% of daylight hours; it is not a measurement of sunshine duration. Heshan is cloudier than 80% of China.
Humidity peaks in June at 81% and is lowest in December at 64%.
Heshan has about 61 days a year above 32°C. Heshan is hotter than 83% of China.
First and last freeze in Heshan
The first fall freeze in Heshan typically comes around December 16, and the last spring freeze around February 9. That leaves a frost-free growing season of about 310 days.
Heshan weather records
These records cover CHANGSHA during 1987–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Heshan station is 41°C, on August 2, 2003. The coldest is -11°C, on December 29, 1991.
The wettest day in the available station history brought 249 mm of precipitation, on June 7, 1997.
48 all-time records have been set at the station since 1987.
The annual mean temperature has changed by +0.4°C per decade since 1987.
The best time to visit Heshan
The most comfortable time to visit is typically April and October to November, when daytime highs sit near 21°C.
Winter (December–February) is chilly, with average highs around 11°C and lows near 4°C.
Spring (March–May) is warm, with average highs around 22°C and lows near 14°C.
Summer (June–August) is hot, with average highs around 32°C and lows near 25°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 23°C and lows near 15°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | 3° | 9° | 76 mm | 13 | 74% | 38% | 27° | -7° |
| February | 5° | 12° | 87 mm | 13 | 78% | 27% | 31° | -8° |
| March | 9° | 16° | 156 mm | 18 | 76% | 28% | 33° | -1° |
| April | 14° | 22° | 178 mm | 16 | 76% | 28% | 36° | 2° |
| May | 19° | 27° | 208 mm | 16 | 78% | 27% | 36° | 11° |
| June | 23° | 30° | 236 mm | 14 | 81% | 17% | 38° | 13° |
| July | 26° | 33° | 166 mm | 10 | 75% | 24% | 41° | 19° |
| August | 25° | 33° | 112 mm | 10 | 73% | 42% | 41° | 17° |
| September | 21° | 28° | 87 mm | 9 | 72% | 44% | 39° | 12° |
| October | 16° | 23° | 61 mm | 9 | 71% | 39% | 38° | 5° |
| November | 10° | 18° | 79 mm | 10 | 73% | 46% | 33° | -2° |
| December | 4° | 12° | 55 mm | 10 | 64% | 50% | 24° | -11° |
Station: CHANGSHA, 63 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1987–2026; 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.
Heshan climate questions
How much rain does Heshan get?
Heshan gets 1501 mm of precipitation in an average year, over about 148 rainy days.
What is the wettest month in Heshan?
June is the wettest month in Heshan, with 236 mm. December is the driest, with 55 mm.
How many rainy days does Heshan have a year?
Heshan has about 148 days with measurable rain in an average year. March has the most, about 18.
What is the hottest month in Heshan?
July is the warmest month in Heshan, with an average high of 33°C.
What is the coldest month in Heshan?
January is the coldest month in Heshan, with an average low of 3°C.
What is the record high temperature in Heshan?
Within the available 1987–2026 station history, the record high at the Heshan station is 41°C, set on August 2, 2003. The record low is -11°C, on December 29, 1991.
What is the sunniest month in Heshan?
December is the sunniest month in Heshan, with estimated sunshine of 50% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Heshan?
The first fall freeze in Heshan typically comes around December 16. The last spring freeze is around February 9.
What is the best time to visit Heshan?
The most comfortable time to visit is typically April and October to November, when daytime highs sit near 21°C.