Xi belongs to the warm temperate semi-humid monsoon climate zone, with moderate rainfall and four distinct seasons. The average frost-free period is 2 19~233 days. 65438+ 10 is the coldest month with an average temperature of-0.5℃ ~1.3℃; It is hottest in July, with an average temperature of 26.3℃ ~ 27℃. The annual average temperature is 65438 03.6℃. The extreme maximum temperature is 45.2℃( 1934) and the extreme minimum temperature is-20.6℃ (1 995 65438+10/). In recent years, the climate is getting warmer. The average temperature in June 2003-2007 was 0.8℃, and that in July was 27.65438 0℃. The annual average temperature is 65438 05.5℃. ) The annual average precipitation is 507.7mm ~ 7 19.8mm ... The annual precipitation days are 96.6 days, and there are three rainfall peaks in a year, namely autumn in September 9- 10/0, summer in July-August and spring in April-May, especially autumn rain. The annual average humidity is 69.6%. Annual average snowfall 13.8 days (snowfall is scarce in recent years due to climate warming). There are more northeast winds in winter and more southerly winds in summer. Affected by topography, the annual average wind speed is 2.0 m/s, which is obviously lower than that in most northern areas. The frost-free period is 207 days. The sky is cloudy, and the sunshine hours in the whole year are obviously lower than those in the northern region.
The average temperature of Xi in 2007 is 13.7℃ (Lantian) ~ 15.6℃ (Xi 'an), which is 0.6 ~ 1.9℃ higher than normal, 0.6℃ higher in Chang 'an and 1.9℃ higher in urban areas.
The annual maximum daily temperature is equal to or greater than 35℃, the average hot period is about 22 days, and the maximum is 1997, reaching 6 1 day. In the 38 years from 196 1 to 1998, high temperature weather above 40℃ occurred in 9 years.
Precipitation Xi In 2007, the total precipitation was 595.9 ~ 732.9 mm, with Lintong being the least and Huxian the most.
The sunshine hours in Xi 'an area of Rizhao in 2007 were 1398.5 ~ 2 126.7 hours. Compared with normal years, there are more sunshine hours in urban areas, Huxian and Lantian, and fewer sunshine hours in Gaoling, Chang 'an, Lintong and Zhouzhi.
Fog occurs frequently in autumn and winter, and the foggy days in all districts and counties are above 10 days throughout the year. -From the Internet.