Heyuan climate
Heyuan (Guangdong, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 22 °C72 °F, and about 1,710 mm67 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Heyuan climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 2068 | 745 | 1356 | 532.1 | 1 |
| Feb | 2373 | 1050 | 1661 | 481.9 | 0 |
| Mar | 2577 | 1457 | 1967 | 1174.6 | 0 |
| Apr | 2883 | 1865 | 2374 | 1706.7 | 0 |
| May | 3086 | 2272 | 2679 | 28611 | 0 |
| Jun | 3187 | 2576 | 2882 | 36214 | 0 |
| Jul | 3289 | 2577 | 2883 | 2017.9 | 0 |
| Aug | 3289 | 2577 | 2883 | 2158.5 | 0 |
| Sep | 3188 | 2374 | 2781 | 1345.3 | 0 |
| Oct | 2984 | 1965 | 2475 | 421.7 | 0 |
| Nov | 2679 | 1457 | 2068 | 441.7 | 0 |
| Dec | 2169 | 847 | 1458 | 361.4 | 1 |
| Year | 3289 | 745 | 2272 | 1,71067 | 2 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 70% | 60% | 3.0 | 10:49 |
| Feb | 73% | 71% | 3.0 | 11:20 |
| Mar | 76% | 79% | 3.1 | 11:57 |
| Apr | 79% | 82% | 3.4 | 12:41 |
| May | 84% | 81% | 4.0 | 13:17 |
| Jun | 88% | 83% | 4.1 | 13:35 |
| Jul | 87% | 75% | 5.0 | 13:28 |
| Aug | 86% | 74% | 4.9 | 12:57 |
| Sep | 83% | 64% | 4.6 | 12:15 |
| Oct | 76% | 51% | 4.2 | 11:33 |
| Nov | 71% | 55% | 3.5 | 10:58 |
| Dec | 66% | 52% | 3.1 | 10:41 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Heyuan is like
The warmest month is August, with an average high of 32 °C89 °F and a low of 25 °C77 °F. The coldest is January, when highs average 20 °C68 °F and lows 7 °C45 °F. There is a clear seasonal cycle, with 15 °C26.9 °F between the average temperature of the warmest and the coolest month.
It is wet, with about 1,710 mm67 in of precipitation per year. The wettest three-month stretch is May–July, which brings 50% of the annual total. The wettest month is June (362 mm14 in), the driest is December (36 mm1.4 in).
Relative humidity ranges from 66% in December to 88% in June. The clearest skies (lowest average cloud amount, 51%) are typical of October. Average wind speed near the ground ranges from 5 km/h (3 mph) in August to 8 km/h (5 mph) in December. Daylight lasts from about 10.7 hours in December to 13.6 hours in June.
Best time to visit Heyuan
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October–February: average highs of 20 °C68 °F to 29 °C84 °F with 36 mm1.4 in to 53 mm2.1 in of precipitation per month.
The most challenging month is June, which is hot, with average highs of 31 °C87 °F, very wet (362 mm14 in) and humid (88% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Heyuan
- Winter (December–February) — highs 2068 to 23 °C73 °F, lows 745 to 10 °C50 °F, about 46 mm1.8 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 2577 to 30 °C86 °F, lows 1457 to 22 °C72 °F, about 191 mm7.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Summer (June–August) — highs 3187 to 32 °C89 °F, lows around 25 °C76 °F, about 259 mm10 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and a good rain jacket or umbrella and quick-drying shoes.
- Autumn (September–November) — highs 2679 to 31 °C88 °F, lows 1457 to 23 °C74 °F, about 74 mm2.9 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Heyuan compares
Compared with Huizhou, about 74 km to the south, Heyuan is on average 0.6 °C1.1 °F cooler and receives 15% more precipitation (1,710 mm67 in vs 1,491 mm59 in). The difference is largest in December (1.2 °C2.2 °F cooler).
Of the 547 places in China covered by World Climates, Heyuan is the 50th warmest by annual mean temperature and the 53rd wettest by annual precipitation. See all of them on the China climate page.
Places in other countries with the most similar temperature and rainfall pattern: Tin Shui Wai (Hong Kong, Cwa), Lạng Sơn (Vietnam, Cfa) and Daytona Beach (United States, Cfa).
Nearby places
- Huizhou 74 km · 23 °C73 °F · 1,491 mm59 in
- Pingshan 82 km · 23 °C73 °F · 1,629 mm64 in
- Licheng 100 km · 22 °C72 °F · 1,868 mm74 in
- Danshui 106 km · 23 °C73 °F · 1,491 mm59 in
- Shuizhai 112 km · 22 °C71 °F · 1,641 mm65 in
- Xingning 115 km · 22 °C71 °F · 1,641 mm65 in
- Hepo 122 km · 22 °C72 °F · 1,738 mm68 in
- Dongguan 124 km · 23 °C73 °F · 1,634 mm64 in
Frequently asked questions
What is the warmest month in Heyuan?
August is the warmest month in Heyuan, with an average high of 32 °C (89 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Heyuan?
January is the coldest month, with an average high of 20 °C (68 °F) and an average low of 7 °C (45 °F).
When does it rain the most in Heyuan?
June is the wettest month with about 362 mm (14.2 in) of precipitation; December is the driest with about 36 mm (1.4 in).
What is the best time to visit Heyuan?
Judging by long-term averages, the most comfortable months are October–February.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 180 m, while Heyuan lies at about 31 m. Temperatures on this page were therefore adjusted by +1 °C1.7 °F using the standard lapse rate of 6.5 °C per 1,000 m.