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五月份有立夏和小满两个节气。闽南、赣南等地上旬开始入夏;江、浙两省大部分地区在下旬入夏;赣北、安徽、湖南、闽北、湖北等地在中旬入夏。气温分布呈西高东低现象。月平均气温18℃,从连云港沿江、浙的海岸线到浙江的象山以西的气温均在18℃以上。有时有高温出现,可能达到35℃以上的酷暑天气。五月江南雨水明显增多。本月为兰花接受阳光最好月份,也是兰花生长的黄金时间。
May summer and Xiaman two solar terms. South Fujian, southern Jiangxi and other places began to enter the early summer; most provinces in Jiangsu and Zhejiang provinces in late summer; in northern Jiangxi, Anhui, Hunan, northern Fujian, Hubei and other places in the mid-summer. The temperature distribution is high in the west and low in the east. The average monthly temperature of 18 ℃, the temperature from the coast of Lianyungang along the Zhejiang and Zhejiang to the west of Xiangshan in Zhejiang are above 18 ℃. Sometimes there is high temperature, may reach more than 35 ℃ summer weather. May Jiangnan rain increased significantly. This month, the sun is the best month to accept orchids, but also the golden age of orchids.