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Average yearly precipitation for Illinois varies from 48 inches or 1,220 mm at the southern tip to 35 inches or 890 mm in the northern portion of the state. Normal annual snowfall exceeds 38 inches or 0.97 m in Chicago, while the southern portion of the state normally receives less than 14 inches or 0.36 m. [1]
Here are rainfall amounts, in inches, from the last 24 hours (unless otherwise noted) by locality, according to National Weather Service St. Louis: Illinois locations. Belleville: 6.23, 6.33 ...
Record-breaking rain that month led to a devastating flood. The rainiest Jan. 23 was in 1996 with 1.57 inches of rain. By contrast, the NWS recorded 0.45 inches of rain Tuesday , and 0 inches ...
Over the contiguous United States, total annual precipitation increased at an average rate of 6.1 percent per century since 1900, with the greatest increases within the East North Central climate region (11.6 percent per century) and the South (11.1 percent). Hawaii was the only region to show a decrease (−9.25 percent). [89]
Several southwest Illinois areas recorded between 5 and 8 inches of rainfall, though one locality had more than 9 inches. Here’s what the National Weather Service St. Louis reported Wednesday ...
The July 2023 Chicago Area Flood was caused by a heavy rainfall that occurred on July 2, 2023, in the Chicago Metropolitan Area of northeastern Illinois.Rainfall up to 9.0 inches (23 cm) occurred over an 18-hour period; the majority occurred from early in the morning to late in the afternoon. [1]
Southern Illinois is expected to see an increase from 43 inches currently to 48 or 52 under the different emissions scenarios. Precipitation is expected to fall in the summer across the entire state, while it will increase in Spring. The decrease in summer precipitation is expected to increase droughts in those months, impacting crop yields. [7]
New rainfall is still only expected to be between a tenth to a quarter of an inch. Saturday evening has a 90% chance of rain while Sunday during the day has a 70% chance of showers.