Heshan is warmest in August, averaging 33° by day and 24° at night. The wettest month is June with 276 mm, and the year brings about 1588 mm in total.
Month by month
| Month | High | Low | Rain | Daylight | Good for |
|---|---|---|---|---|---|
| January | 11° | 1° | 81 mm | 10.4 h | Cool |
| February | 13° | 3° | 106 mm | 11.0 h | Mild |
| March | 20° | 8° | 161 mm | 11.8 h | Mild |
| April | 24° | 13° | 204 mm | 12.7 h | Rainy season |
| May | 28° | 18° | 217 mm | 13.4 h | Rainy season |
| June | 31° | 22° | 276 mm | 13.8 h | Rainy season |
| July | 33° | 25° | 195 mm | 13.7 h | Rainy season |
| August | 33° | 24° | 99 mm | 13.0 h | Beach weather |
| September | 32° | 20° | 84 mm | 12.2 h | Beach weather |
| October | 25° | 14° | 74 mm | 11.3 h | Beach weather |
| November | 21° | 9° | 69 mm | 10.5 h | Sightseeing |
| December | 13° | 2° | 22 mm | 10.2 h | Mild |
High and low are average daily maximum and minimum, rain is typical monthly total, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER — averages, not promises.
When to go
Beach weather: August, September and October — highs around 30°, nights no colder than 14°, and at most 99 mm of rain in a month.
Walking the city: November — highs of 21–21° and no more than 69 mm of rain a month.
Wet season: April, May, June and July — up to 276 mm in a single month.