Jiangmen is warmest in July, averaging 32° by day and 26° at night. The wettest month is June with 348 mm, and the year brings about 1952 mm in total.
Month by month
| Month | High | Low | Rain | Sea | Daylight | Good for |
|---|---|---|---|---|---|---|
| January | 22° | 10° | 19 mm | 17° | 10.8 h | Sightseeing |
| February | 24° | 13° | 81 mm | 18° | 11.2 h | Sightseeing |
| March | 27° | 16° | 102 mm | 20° | 11.8 h | Beach weather |
| April | 29° | 20° | 135 mm | 23° | 12.5 h | Mild |
| May | 31° | 24° | 319 mm | 27° | 13.1 h | Rainy season |
| June | 31° | 26° | 348 mm | 29° | 13.4 h | Rainy season |
| July | 32° | 26° | 198 mm | 30° | 13.3 h | Rainy season |
| August | 32° | 26° | 335 mm | 29° | 12.8 h | Rainy season |
| September | 32° | 25° | 258 mm | 29° | 12.1 h | Rainy season |
| October | 28° | 20° | 87 mm | 27° | 11.5 h | Beach weather |
| November | 26° | 17° | 54 mm | 23° | 10.9 h | Beach weather |
| December | 21° | 11° | 16 mm | 20° | 10.6 h | Sightseeing |
High and low are average daily maximum and minimum, rain is typical monthly total, sea is the average surface temperature, daylight is the hours between sunrise and sunset mid-month. Climate normals from NASA POWER and NOAA MUR — averages, not promises.
When to go
Beach weather: March, October and November — highs around 27°, nights no colder than 16°, and at most 102 mm of rain in a month. The sea sits at 20–27° then.
Walking the city: January, February and December — highs of 21–24° and no more than 81 mm of rain a month.
Wet season: May, June, July, August and September — up to 348 mm in a single month.