Geographical environment of Huaining county

Huaining County belongs to the north subtropical humid monsoon climate zone, with four distinct seasons, mild climate, abundant rainfall, abundant sunshine and short frost and snow period.

The beginning of spring and the whole day are March 16 and May 20, respectively, and last for 66 days. The temperature rises rapidly, but the cold and warm air currents alternate frequently, and cold weather often occurs in late spring. Seasonal average temperature 15.9℃, extreme maximum temperature 34.3℃ (May 20th 1980) and extreme minimum temperature-0.4℃ (March 20th 1976), with a range of about 35℃. The wind direction is changeable this season, but it is usually dominated by northeast wind. The average monthly rainy days in the whole year are 1 1 day, and the average monthly rainy days in this season are 15 days.

The start and end of summer are May 2 1 Sunday and September 25, respectively, for a total of 128 days. From late May to late June, it is the rainy season in Xia Meng. Generally, plum blossoms enter in mid-June and blossom in mid-July. During this period, the rainfall is concentrated, from heavy rain to heavy rain, and sometimes floods occur. When the humidity is high, clothes and food are easy to get moldy. Early July to early August is midsummer, often controlled by subtropical high, with sunny and hot weather, local thunderstorm, high temperature, strong sunshine and large evaporation, which is the driest period of the year. Mid-August to late September is the end of summer, sometimes affected by typhoons, accompanied by rainfall processes and strong winds of different intensities.

Autumn begins on September 26th, and1October 20th lasts for 56 days, namely 165438. Autumn is crisp, the temperature difference between day and night is large, and less rain and fog are the main characteristics of this season. Due to the obvious influence of cold air in the north, the temperature drops slowly, and the weather is getting colder at the end of the season, with occasional frost and snow.

Beginning of winter and the whole day are165438+1October 2 1 and March 15 respectively, for a total of 1 15 days. After the light snow, it entered winter, and the northeast wind prevailed. The seasonal average wind speed is 3.3 m/s, and the maximum wind speed is 20 m/s. Due to the frequent southward movement of strong cold air in the north, the temperature drops sharply, and it is sunny and cold. The seasonal average temperature is 4.6℃, the extreme minimum temperature is-15℃, and the average number of days with the daily minimum temperature ≤0℃ for many years is about 4 1 day.