First Half of September in Illinois – Warmer than Average

The first half of September in Illinois was warmer than average, about 3.5 degrees above average.

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Precipitation for the first half of September is mixed. A few areas east of St. Louis and along the eastern border with Indiana have seen 3 to 4 inches, which is well above average. Much of the rest of the state has seen a respectable 1 to 3 inches. Western Illinois has been drier.

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