Historical Weather Records & Monthly Climate for Mount Prospect, IL

All-Time High
104°F
All-Time Low
-21°F
Max Daily Snow
9.8"
Max Daily Rain
4.53"
Max Snow Depth
0

Monthly Climate Averages for Mount Prospect, IL

Based on 30 years of historical data (1994 - 2023)

MonthHigh (°F)Low (°F)Precip (in)Snow (in)
January46°28°4.18"6.25"
February50°31°3.81"4.99"
March57°37°4.4"3.08"
April65°44°4.15"0.91"
May71°53°4.28"0
June78°60°4.66"0
July80°64°5.23"0
August79°63°4.9"0
September75°58°3.87"0
October66°48°3.05"0.25"
November56°38°3.29"0.89"
December49°33°3.84"3.4"

Historical Weather Extremes for Mount Prospect, IL

Based on 80+ years of archive data (1940 - 2024)

🔥
Longest Heatwave
10 Days
1953
Consecutive days ≥ 90°F
🧊
Deepest Freeze
43 Days
1977
Consecutive days ≤ 32°F
🏜️
Longest Drought
26 Days
1944
Consecutive days w/o rain
Wettest Month
9.91"
August 2007
Most rainfall in one month
Snowiest Month
20.84"
January 1979
Most snowfall in one month

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