Illinois Experiences Some of the Coldest Mays on Record
Illinois Experiences Some of the Coldest Mays on Record
US · Published May 11, 2026
• Illinois has experienced some of its coldest Mays since 1895, according to data compiled by Stacker from the National Centers for Environmental Information. The rankings are based on the lowest average temperatures recorded during the month of May over the years. Notable years include May 1917, which holds the record for the coldest May with an average temperature of 55.8°F (13.2°C), and May 1924 and 1907, which tied for second place with an average temperature of 55.9°F (13.3°C). These months also saw relatively low high temperatures, such as 67.4°F (19.7°C) in May
• Precipitation levels varied, with May 1935 recording the highest total precipitation at 7.83 inches. The data highlights significant historical weather patterns in the state.

Why It's Important?

The cold Mays in Illinois have historically impacted agriculture, outdoor activities, and energy consumption. Lower temperatures during the planting season can delay crop growth, potentially affecting yields. Additionally, cooler weather may lead to increased heating costs for residents and businesses. While these conditions are not immediately hazardous, they can disrupt seasonal norms and economic activities tied to warmer spring weather.

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