September 2021 Climate Summary

Storm Impacting the Northwest U.S.; Fire Weather Conditions in Southern California; Severe Weather in the South

A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. 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