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Hefei, the capital of Anhui province, sits on a plain in east-central China, between the Yangtze and Huai rivers at approximately 31.82°N, 117.23°E. It has a humid subtropical climate (Köppen Cfa) influenced by the East Asian monsoon — with hot, humid, rainy summers and cool, damp winters — lying in the transitional zone between north and south China, with four distinct seasons and a marked early-summer plum-rain spell.
Summer, from June to August, is hot and humid, with July and August the warmest months — average highs around 32–33°C — and heatwaves that can exceed 38°C. Early summer brings the plum rains, a spell of persistent, often heavy rain in June and July, after which mid-summer can turn hot and drier under the subtropical high. Thunderstorms are frequent, and the humidity makes the heat feel oppressive.
Winter, from December to February, is cool to cold and damp, with January the coolest month — average highs around 8°C and lows near 0°C, occasionally dropping below freezing with frost and the odd snowfall. The season is often grey and raw, with penetrating dampness that makes it feel colder than the readings suggest, a hallmark of the region south of the main heating line.
Hefei receives around 1,000–1,100 mm of rain a year, concentrated in the summer months, with the plum-rain season of June and July the wettest, while autumn and winter are drier; rain falls year-round. Live rainfall, humidity, and pressure readings for the city are shown in the panels above.
Hefei sits on the climatic dividing line between northern and southern China, giving it four sharp seasons, hot muggy summers and cool damp winters. Its most distinctive feature is the plum-rain season of early summer — a monsoon-driven spell of prolonged, sometimes heavy rain that can cause flooding along the Yangtze and Huai river systems before the peak summer heat sets in.
To follow any single measurement in Hefei more closely, use our live instruments: the online barometer for atmospheric pressure, the thermometer for temperature, the hygrometer for humidity, the anemometer for wind speed, the wind vane for wind direction, and the rain gauge for rainfall.