Weather in Dongguan

On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are March, November, and December. Dongguan is in China at 23.0°N. The 2001–2020 NASA POWER daily record describes a mild oceanic climate.

July is the warmest month (average 28.6°C, high 31.5°C) and January is the coolest (average 15.1°C, low 9.3°C). Rain is wet season runs from March to September, inside an annual total of 1634 mm. The wettest month is June at 325 mm; the driest is December at 28 mm.

When the score favours a visit

The three months with the highest comfort score are March, November, and December: March (20.7°C average, 91 mm, 74% humidity); November (21.1°C average, 37 mm, 71% humidity); December (16.1°C average, 28 mm, 65% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you want the wet season itself — fewer crowds, greener landscape, heavier rain — aim at March–September instead of the score.

Temperature through the year

Dongguan has a 13.5°C gap between its coolest monthly average (15.1°C in January) and its warmest (28.6°C in July). That is a northern-hemisphere pattern.

Across the year the mean afternoon high is 27.7°C. If you want the smallest day–night shock, look at months where the high and low sit close together; July nights still hold 25.8°C.

Rain through the year

The wet season in Dongguan starts in March and ends in September (March, April, May, June, July, August, and September). June is the core of it at 325 mm. December is the other extreme, with 28 mm.

Humidity peaks near 87%. That usually lines up with the wetter months rather than the hottest ones.

What stands out month by month

The year bottoms out in January. Plan for 9.3°C at night and 21.0°C in the afternoon. The wet season opens in March. Expect 91 mm and 11 rainy days, with nights around 15.4°C. In April, Dongguan averages 28.7°C by day and 19.4°C at night, with 142 mm of rain. May: 30.5°C high, 23.1°C low, 279 mm rain, 83% humidity. June is the wettest month — 325 mm and 23 rainy days, with 87% humidity.

Peak heat arrives in July: 31.5°C by day, 25.8°C at night, and 86% humidity. By September the wet season is ending. Dongguan still sees about 164 mm, but the next month is usually leaner. October brings 50 mm and 6 rainy days; temperatures run from 19.7°C to 29.4°C. November stands apart from the months beside it: 26.8°C / 15.4°C and 37 mm. December is the driest month, averaging only 28 mm across 4 rainy days. Highs sit near 22.1°C.

Dongguan and other cities in China

Guangzhou is about 52 km away: Dongguan is about as warm as Guangzhou at the hot peak and 96 mm drier over the year than Guangzhou. Guangzhou’s wettest month is June (332 mm) versus June here.

Wuhan is about 843 km away: Dongguan is 0.5°C cooler than Wuhan in its hottest month and 302 mm wetter over the year than Wuhan. Wuhan’s wettest month is July (222 mm) versus June here.

Chongqing is about 1021 km away: Dongguan is about as warm as Chongqing at the hot peak and 491 mm wetter over the year than Chongqing. Chongqing’s wettest month is June (205 mm) versus June here.