Yuncheng's climate is primarily characterized by a warm temperate continental monsoon climate with distinct four seasons. The following characteristics are present:
Temperature Characteristics
Annual Average Temperature: 13.3°C to 13.8°C, January Average Temperature: -2.2°C to -3.2°C, July Average Temperature: 26.5°C to 27.4°C
Extreme Temperatures: Historical High: 42.8°C to 43°C (1966), Low: -19°C to -24.6°C (1971)
Warming Trend: Over the past 60 years, the average temperature has increased by 0.26°C per decade, with a significant increase in minimum temperature (0.3°C per decade).
Precipitation and Humidity
Annual Precipitation: Averages 503.7 to 559.3 mm, with uneven regional distribution (750 mm in the southeast, decreasing to 500 mm in the northwest). (mm)
Seasonal Distribution: Summer and autumn account for 70% of the year (July and August account for 40%), while winter and spring only account for 20%.
Drying Trend: Over the past 30 years, precipitation has decreased by 8.4 mm per decade, and the number of rainy days has decreased by 5.2 days per decade.
Other Climate Factors
Sunshine and Frost-Free Period: Annual sunshine hours: 2039.5-2247.4, frost-free days: 208-212 days.
Wind and Evaporation: Annual average wind speed: 1.9 m/s, annual evaporation: 1838.9 mm.
Regional Differences
Beiyuan Area (e.g., Wenxi County): Annual average temperature: 8-14°C, precipitation: 439.8 mm. Large diurnal temperature swings favor sugar accumulation.
Yuncheng's climate is showing a warming and drying trend, requiring attention to water shortages and the impact of extreme weather.