Coldest Mays in Iowa Since 1895 Highlighted by Historical Data
A recent analysis by Stacker, using data from the National Centers for Environmental Information, has ranked the coldest Mays in Iowa since 1895. The rankings are based on the lowest average temperatures recorded during each month. The coldest May on record occurred in 1907, with an average temperature of 52.7°F (11.5°C), a monthly high of 65.3°F (18.5°C), and a low of 40°F (4.4°C). Other notable years include May 1924, which ranked second with an average temperature of 53.4°F (11.9°C), and May 1935, tied for third at 54.2°F (12.3°C). Precipitation levels varied significantly, with May 1915 recording the highest total precipitation at 7.35 inches, while May 1924 saw only 1.68 inches. This historical data provides insight into the variability of spring weather in Iowa over the past century. 
