Minor Heat (Xiaoshu, 小暑) falls around 6-8 July at solar longitude 105°, when summer turns hot but not yet hottest and the dog days are near.
Solar longitude
105°
Type
Sectional term (jie)
Season
Summer
Order
No. 11 of 24
Usual dates
Jul 6–7
Meaning and Astronomy
Xiaoshu (小暑) begins when the sun reaches ecliptic longitude 105°, usually between 6 and 8 July. It is the eleventh solar term, a jie (節) or sectional term that opens the sixth lunar month.
Shu means heat. 'Minor Heat' signals that it is already hot, but the peak usually comes around the next term, Major Heat. Soon after Xiaoshu the dog days (三伏) begin, counted from the third geng day after the summer solstice; this hottest stretch of the year runs roughly from mid-July to mid- or late August.
The Three Pentads
First pentad: Warm winds arrive (溫風至) - even the breeze now feels hot.
Second pentad: Crickets shelter by the walls (蟋蟀居壁) - crickets leave the hot fields for shady corners.
Third pentad: Young hawks learn to strike (鷹始摯) - hawks circle high to practise hunting; some say they rise to cooler air.
Climate and Farming
Around Xiaoshu the plum rains usually end along the middle and lower Yangtze, which then falls under the subtropical high, bringing hot, dry spells and the risk of midsummer drought. Northern and northeastern China enter their rainiest period, summed up by forecasters as 'late July, early August'. Taiwan and Hong Kong are hot and humid, with afternoon thunderstorms and active typhoons. A common saying describes the season as 'steaming from above, boiling from below' (小暑大暑，上蒸下煮), and Jiangnan folklore holds that thunder at Xiaoshu can bring the plum rains back.
In southern double-cropping areas farmers face the 'double rush' (雙搶), harvesting early rice and transplanting late rice before the Start of Autumn; Taiwan's first rice crop is mostly harvested in June and July. In the north, farmers fertilise and cultivate summer maize and soybeans and guard against waterlogging.
Customs
In parts of southern China families 'taste the new' (食新): newly harvested rice is cooked and first offered to ancestors and the grain deity, then shared at home. The sixth day of the sixth lunar month, often near Xiaoshu, was traditionally a day for airing clothes, bedding and books in the sun to prevent mould and insects, and Buddhist temples aired their scriptures.
Northerners follow a sequence of dog-day foods: 'dumplings in the first period, noodles in the second, pancakes with egg in the third'. Around Xuzhou in Jiangsu, people eat mutton and mutton soup at the start of the dog days, believing a good sweat helps them cope with heat. Taiwan, Hong Kong and Macau have few customs tied to Xiaoshu, though people prepare for heat and typhoons.
Seasonal Food and Wellness
Avoiding heatstroke matters most: limit time in midday sun, drink plenty and use shade. Light meals with lotus root, winter melon, luffa and mung beans are traditional choices. Traditional Chinese medicine practises 'treating winter ailments in summer', such as dog-day herbal plasters (三伏貼); whether these suit anyone should be judged by a qualified practitioner. These are traditional ideas, not medical advice.