The annual average temperature is between 15.0-2 1.0℃, slightly higher than 20.0℃ in the coastal plain and the southeast coast of Mulan River, and lower than 18℃ in the northern and northwestern mountainous areas. With the elevation of topography and altitude, the annual temperature in China decreases from southeast to northwest, with obvious changes.
The daily variation of temperature is the lowest before sunrise (5-6 o'clock) and the highest in the afternoon (13- 14 o'clock).
The daily average temperature difference in Xianyou County is 8.9℃, the highest in June is 9.8℃, and the lowest is 7.6℃.
The frost-free period in all parts of the county is 233-34 1 day, with a difference of 108 days.
The annual average frost period is 52.4 days, with a maximum of 90 days and a minimum of 1 day.
The annual average solar radiation is 4622.6 MJ/m2.