Here are some Halloween statistics for locations across Illinois. Typical for Illinois, Halloween can be either near freezing or downright balmy. This year’s Halloween will likely be warmer than normal with highs ranging from the low 60s in northeastern IL to the upper 70s in southern IL (map below), but not record breaking. Last year was much cooler with highs in the 50s and low 60s, and a band of rain from St. Louis to parts of Chicago.
The Romeoville NWS office has compiled the stats for Chicago and Rockford.
The Lincoln NWS office has compiled the numbers for Springfield and Peoria in PDF format.
The Davenport NWS office has compiled the numbers for Moline.
The St. Louis office has compiled the numbers for Quincy (scroll down the page).
Here are the numbers for other locations in Illinois. Notice how the record highs typically were set in 1950 and the record lows were set in 1925.
Champaign-Urbana
- Normal High: 59 degrees
- Normal Low: 38 degrees
- Warmest: 83 degrees in 1950
- Coldest: 20 degrees in 1925
- Wettest: 1.38 inches in 2013
Bloomington-Normal
- Normal High: 58 degrees
- Normal Low: 37 degrees
- Warmest: 84 degrees in 1950
- Coldest: 14 degrees in 1925
- Wettest: 1.77 inches in 1946
Decatur
- Normal High: 61 degrees
- Normal Low: 40 degrees
- Warmest: 85 degrees in 1950
- Coldest: 17 degrees in 1925
- Wettest: 1.97 inches in 2013
Carbondale
- Normal High: 65 degrees
- Normal Low: 40 degrees
- Warmest: 86 degrees in 1950
- Coldest: 20 degrees in 1925
- Wettest: 2.80 inches in 1932