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 >
Overview & Graphics
September featured persistent warmer than normal temperatures, especially in the middle to late portion of the month. It was also a very wet month. Heavy rain events in the early to mid month period focused primarily across far northern Illinois. In late September, there were multiple rain events affecting areas farther south, most significantly on September 27th when 4 to 8", locally as high as 9", fell across areas along and south of I-80. This caused significant flash flooding for the hardest hit areas. Several area rivers were in flood stage for a large portion of September.
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Chicago and Rockford Monthly Summary
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 941 AM CDT TUE OCT 1 2019 ...A Look Back at the Climate for the Month of September 2019 for Chicago and Rockford... At Chicago, the average high temperature was 76.9 degrees, which is 2.1 degrees above normal. The average low temperature was 61.9 degrees, which is 7.6 degrees above normal. The average temperature for the month was 69.4 degrees which is 4.8 degrees above normal. During the month of September, 7.61 inches of precipitation were recorded, which is 3.21 inches above normal. There was 1 record for Chicago for the month of September 2019: * Record daily precipitation of 2.28 inches on the 27th. One Top Ten Monthly Record: **6th wettest September on record since 1871 with 7.61 inches. At Rockford, the average high temperature was 76.8 degrees, which is 1.4 degrees above normal. The average low temperature was 60.2 degrees, which is 7.8 degrees above normal. The average temperature for the month was 68.5 degrees, which is 4.6 degrees above normal. During the month of September, 9.10 inches of precipitation were recorded, which is 5.75 inches above normal. There was 1 record for Rockford for the month of September 2019: * Record daily precipitation of 2.92 inches on the 12th. Two Top Ten Monthly Records: **Tied 7th warmest September on record since 1906 with 68.5 degrees. **6th wettest September on record since 1906 with 9.10 inches. $$
Monthly Climate Report: Chicago | Rockford
Events
NWS Chicago Science and Past Events Page
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