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The highest temperature recorded in Illinois was 117 °F (47.2 °C), ... Monthly average high and low temperatures in Fahrenheit for various Illinois cities;
Temperatures vary tremendously in the springtime; at 100 °F (38 °C), March is the month with the greatest span between the record high and low. At O'Hare, temperatures as low as 7 °F (−14 °C) and 31 °F (−1 °C) have been recorded as late as April 7 and May 21, respectively.
As for what a typical summer weather day is in Illinois, the University of Illinois state climatologist office says highs are usually in the 80s with lows in the 60s. Days above 90 degrees are ...
The all-time high temperature was 117 °F (47 °C), recorded on July 14, 1954, at East St. Louis, and the all-time low temperature was −38 °F (−39 °C), recorded on January 31, 2019, during the January 2019 North American cold wave at a weather station near Mount Carroll, [69] [70] and confirmed on March 5, 2019. [71]
This is a list of cities by average temperature (monthly and yearly). The temperatures listed are averages of the daily highs and lows. Thus, the actual daytime temperature in a given month may be considerably higher than the temperature listed here, depending on how large the difference between daily highs and lows is.
Average max. and min. temperatures in °C Precipitation totals in mm In recent years, average temperatures in the county seat of Sullivan have ranged from a low of 19 °F (−7 °C) in January to a high of 87 °F (31 °C) in July, although a record low of −26 °F (−32 °C) was recorded in January 1915 and a record high of 111 °F (44 °C ...
The Old Farmer's Almanac has released its 2024-2025 Winter Weather Forecast, and while the national outlook calls for a "calmer, gentler" season, the prediction for Illinois — especially Peoria ...
Higher temperatures will yield more heat waves like the 1995 Chicago heat wave. [8] According to the National Weather Service, heat is a leading contributor to weather-related deaths. [9] Increases in temperature are especially dangerous in cities like Chicago, which experience the urban heat island effect. Future heat waves will yield similar ...