Historical Weather Records & Monthly Climate for Florissant, MO

All-Time High
115°F
All-Time Low
-18°F
Max Daily Snow
12.4"
Max Daily Rain
8.64"
Max Snow Depth
20"

Monthly Climate Averages for Florissant, MO

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

MonthHigh (°F)Low (°F)Precip (in)Snow (in)
January39°24°2.79"4.21"
February44°27°2.53"3.58"
March55°37°4.08"1.94"
April65°47°4.6"0.27"
May75°58°5.23"0
June84°67°4.32"0
July87°71°4.09"0
August86°70°3.59"0
September79°62°3.39"0
October67°51°3.63"0.01"
November54°39°3.29"0.73"
December43°29°2.66"2.89"

Historical Weather Extremes for Florissant, MO

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

🔥
Longest Heatwave
20 Days
2007
Consecutive days ≥ 90°F
🧊
Deepest Freeze
19 Days
1977
Consecutive days ≤ 32°F
🏜️
Longest Drought
28 Days
1944
Consecutive days w/o rain
Wettest Month
14.78"
August 1946
Most rainfall in one month
Snowiest Month
26.3"
December 1973
Most snowfall in one month

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