Illinois State Water Survey Illinois State Climatologist

Drought is Intensifying in Illinois

An extremely dry end to summer and start to fall has intensified ongoing drought in central and southern Illinois and increased the fire and blowing dust risk as we approach harvest. River levels have dropped near or below low stage, including on the Kaskaskia, Sangamon, and Mackinaw, among others. Dry August Sparks Flash Drought August […]

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Mild October Had a Chilly End

The preliminary statewide average October temperature was 56.7 degrees, 1.9 degrees above the 1991–2020 average and tied for the 31st warmest on record going back to 1895. The preliminary statewide total October precipitation was 3.46 inches, 0.20 inches above the 1991–2020 average and the 41st wettest on record. Data are provisional and may change slightly […]

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Illinois First Fall Freeze Climatology

Due to significant planting delays across most of the Midwest this year, I have heard many concerns about an early fall freeze and its potential effects on immature crops. Most plants experience damage from a hard freeze or “killing freeze”, which is typically designated by a daily minimum air temperature at or below 28°F. Even […]

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