Illinois State Water Survey Illinois State Climatologist

Mild May Wrapped Up an Otherwise Warm Spring in Illinois

The preliminary statewide average May temperature was 62.2 degrees, 1.0 degrees below the 1991–2020 normal, 0.1 degrees above the 20th Century average, 1.2 degrees below the most recent 30-year average, and the 62nd warmest May on record.  The preliminary statewide total May precipitation was 2.89 inches, 1.88 inches above the 1991–2020 normal, 1.19 inches below […]

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Spring Begins with a Very Warm and Wet March

The preliminary statewide average March temperature was 47.3 degrees, 5.9 degrees above the 1991–2020 normal, 7.5 degrees above the 20th Century average, 5.3 degrees above the most recent 30-year average, and it tied for 9th warmest March on record going back to 1895. The preliminary statewide average total March precipitation was 4.85 inches, 1.91 inches […]

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Spring Begins with a Very Warm March

The statewide average March temperature was 47.7°F, 6.3° above the 1991-2020 normal for March and the 7th warmest March on record statewide. The statewide average total March precipitation was 2.76 inches, 0.18 inches below normal and the 58th driest March on record statewide. March Temperatures Start and End Like a Lamb March temperatures had ebb […]

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The Dry April That Wasn’t

April ended colder and wetter than average across the state. The preliminary statewide average April temperature was 49.2 degrees, 3.4 degrees below the 30-year normal and tied for the 27th coldest on record going back to 1895. The preliminary statewide average total April precipitation was 4.36 inches, 0.58 inches above than the 30-year normal and […]

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