September 2021 Climate Summary

Fresh Snow and Temperature Outlook Ahead of Christmas Day

If you are looking for fresh snow by Christmas morning or are curious about potential travel disruptions, the best chances for at least 1" of new snowfall early this week exist across the mountainous West, Great Lakes, and Northeast. Otherwise, temperatures this last full week of December will average above normal for much of the lower 48 states. Read More >

Public Information Statement...CORRECTED National Weather Service Chicago IL 644 PM CDT Fri Oct 1 2021 /744 PM EDT Fri Oct 1 2021/ ...A Look Back at the Climate for the Month of September 2021 for Chicago and Rockford... At Chicago, the average high temperature was 79.8 degrees, which is 4.3 degrees above normal. The average low temperature was 60.7 degrees, which is 3.6 degrees above normal. The average temperature for the month was 70.3 degrees, which is 4.0 degrees above normal. During the month of September, 1.23 inches of precipitation were recorded, which is 1.96 inches below normal. There were no daily records set for Chicago during the month of September 2021. One top ten monthly record: ** Tied with 1925 for 5th warmest September on record since 1871. At Rockford, the average high temperature was 82.7 degrees, which is 7.4 degrees above normal. The average low temperature was 55.2 degrees, which is 1.7 degrees above normal. The average temperature for the month was 68.9 degrees, which is 4.5 degrees above normal. During the month of September, 0.53 inches of precipitation were recorded, which is 3.09 inches below normal. There were 2 daily records set for Rockford during the month of September 2021: * Tied daily maximum temperature of 93 degrees on the 19th. * Record daily maximum temperature of 90 degrees on the 27th. Two top ten monthly records: ** 7th warmest September on record since 1905. ** 7th driest September on record since 1905. $$ - Izzi