Jiangxi is a subtropical monsoon climate zone with four distinct seasons, long winter and summer, and short spring and autumn.

There is abundant rainfall and sunshine throughout the year.

Spring (March-May) is cold and rainy, with strong convective weather such as strong wind, heavy precipitation and hail, and it begins to enter the flood season in April.

In summer (June-August), the temperature is high and the humidity is high, and the flood season and autumn flood season meet in this season. In June, precipitation is concentrated, which is prone to rainstorm and flood, and summer drought often occurs in July and August.

Autumn (September ~165438+1October) is crisp and the temperature is suitable, but autumn drought often occurs;

Winter (65438+February ~ February of the following year) is wet and cold, with frequent influence of cold air and northerly winds.

The average temperature in spring is 65438 07.3℃, which is mainly influenced by the south branch trough, and the weather is complex and changeable.

In the past 50 years, the seasonal average temperature has shown an upward trend, especially since the early 1990s, the temperature in spring has risen obviously.

The main disastrous weather in this season includes: continuous low temperature and rainy weather, heavy precipitation, thunderstorm and gale, hail and so on.

The average temperature in summer is 27.6℃, showing a downward trend in recent 50 years. The average number of high-temperature days with daily extreme maximum temperature ≥35℃ in the whole province is 22 days, and the seasonal historical extreme maximum temperature is 44.9℃ (in Xiushui,1953 August 15).

From June to early July, precipitation is concentrated, and heavy rain and heavy rain are easy to cause floods or waterlogging. After the rainy season, controlled by the western Pacific subtropical high, summer drought often occurs.

The average temperature in autumn is 19℃, with sunny weather, low wind, low humidity and moderate temperature, which is the most pleasant season in a year.

In recent 50 years, especially since the mid-1990s, the average temperature in autumn has been on the rise. In some years, there will be hot weather in autumn, commonly known as "autumn tiger"

The seasonal historical extreme maximum temperature is 40.8℃ (appearing in Xinjian, September, 0963, 65438+ 1 day), and the maximum number of high temperature days is 1 1 day (1964). The seasonal historical extreme minimum temperature is -6.4℃ (appearing in Wuyuan, 197 1 year 1 1 month 30th).

The main meteorological disasters in this season are autumn drought and cold dew wind.

The average temperature in winter is 7.2℃, the coldest in June is 5438+ 10, and the average monthly temperature is only 6℃.

The daily extreme minimum temperature is-18.9℃ (appearing in Pengze,1969 February 6). In recent 50 years, the average temperature in winter has been on the rise, especially since the late 1980s, and the temperature rise in winter is the most obvious in the whole year.

The precipitation in winter also showed an obvious upward trend. The main disastrous weather in this season is ice frost, heavy snow, heavy rain, cold air and strong wind, fog and haze.

Hebei Province, located in the eastern coast of China, has a temperate continental monsoon climate with four distinct seasons.

The annual average temperature is between -0.5℃ and 14.2℃, and the annual extreme maximum temperature mostly occurs in June and July.

The Great Wall is an important dividing line of temperature distribution in Hebei Province. The annual average temperature in the north of the Great Wall is lower than 10℃, higher than 10℃ in the south of the Great Wall, and higher than 12℃ in the south-central region.

Hebei province is rich in heat sources, with annual sunshine hours ranging from 2355 to 3062 hours. Bashang, northern mountainous area and Bohai coast are stable sunny areas.

The annual frost-free period is 120-240 days, and the average annual precipitation is 300-800 mm, mainly in July and August.