Abstract: A statistical analysis of temperature, precipitation, relative humidity, and sunshine hours across the 24 solar terms in the western, central, and eastern regions of Inner Mongolia from 1971 to 2022 was conducted. The key findings include: 1) The temperature and precipitation values in the three regions exhibit distinct annual cyclical patterns. The highest and lowest average temperatures for the three regions were recorded during the Minor Heat and Minor Cold, respectively. Significant temperature fluctuations were observed around the Spring Equinox, Pure Brightness, and Beginning of Winter. The highest precipitation levels were recorded during the Major Heat in the central and western regions, whereas the eastern region experienced the highest precipitation during the Minor Heat. Relative humidity reached its peak during the Major Heat in the central and eastern regions, whereas in the western region, it peaked during the Beginning of Autumn. All three regions reached their peak sunshine hours during the Grain Buds. 2) The average temperature in all three regions showed an increasing trend from 1971 to 2022, whereas relative humidity and sunshine hours exhibited a decreasing trend.