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The highest temperature recorded in Illinois was 117 °F (47.2 °C), recorded on July 14, 1954, at East St. Louis, while the lowest temperature was −38 °F (−38.9 °C), recorded on January 31, 2019, at Mount Carroll. Illinois averages around 50 days of thunderstorm activity a year which put it somewhat above average for number of ...
The driest month on record has been September 1979 with a mere 0.01 in (0.25 mm) of rainfall, while the wettest is August 1987 with 17.10 in (434 mm) of rainfall; annual precipitation has ranged from 22.22 in (564 mm) in 1962 to 50.86 in (1,292 mm) in 2008. [16]
Illinois has a maximum north–south distance of 390 miles (630 km) and 210 miles (340 km) east-west. Total area is 57,918 square miles (150,010 km 2), ranked 25th in size of the 50 states. Water area is 2,325 square miles (6,020 km 2); Lake Michigan accounts for most of this. Charles Mound in the northwest Driftless Area is the highest point ...
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 ...
The average temperature that month was around 10 °F (−12 °C). Chicago's yearly precipitation averages about 39 inches (990 millimeters). Summer is typically the rainiest season, with short-lived rainfall and thunderstorms more common than prolonged rainy periods. [4] Winter precipitation tends to be more snow than rain. Chicago's snowiest ...
Website. www.mcleancountyil.gov. McLean County is the largest county by land area in the U.S. state of Illinois. According to the 2020 Census, it had a population of 170,954. [ 1 ] Its county seat is Bloomington. [ 2 ] McLean County is included in the Bloomington–Normal, IL Metropolitan Statistical Area.
Temperature. According to a 2021 report from The Nature Conservancy, the average daytime temperature in Illinois has increased by 1 to 2 °F (0.6 to 1.2 °C) over the historical average in the last 100 years. Additionally, the nighttime minimum temperatures are rising at a faster rate than the daytime high temperatures.
Average yearly precipitation for Illinois varies from just over 48 in (1,219 mm) at the southern tip to around 35 in (889 mm) in the northern portion of the state. Normal annual snowfall exceeds 38 in (965 mm) in the Chicago area, while the southern portion of the state normally receives less than 14 in (356 mm). [67]