Jan : Temperature in O-Fallon is lowest during Jan. In Jan, temperature during day raise upto 5 C° and temperature during night goes down upto -6 C°. Jan is one of the snowy months in O-Fallon. According to past year record, there is 6.12cm snow fall every year during Jan in O-Fallon.
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Feb : During Feb month, highest temperature is 7 C° and lowest temperature is -4 C°. Feb is one of the snowy months in O-Fallon. According to past year record, there is 5.7cm snow fall every year during Feb in O-Fallon.
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Mar : In O-Fallon during Mar, day temperature raise upto 13 C° and night temperature goes down upto 1 C°. Mar is one of the rainy months in O-Fallon. According to past year record, there is 9.08cm rain fall every year during Mar in O-Fallon.
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Apr : In Apr, temperature during day raise upto 20 C° and temperature during night goes down upto 7 C°. Apr is one of the rainy months in O-Fallon. According to past year record, there is 10.17cm rain fall every year during Apr in O-Fallon. So if you are planing to visit O-Fallon during Apr, umbrella is worth considering.
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May : During May month, highest temperature is 25 C° and lowest temperature is 12 C°. May is one of the rainy months in O-Fallon. According to past year record, there is 11.57cm rain fall every year during May in O-Fallon. So if you are planing to visit O-Fallon during May, umbrella is worth considering.
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Jun : Jun is one of the hot months in O-Fallon. In O-Fallon during Jun, day temperature raise upto 29 C° and night temperature goes down upto 17 C°. Jun is one of the rainy months in O-Fallon. According to past year record, there is 9.48cm rain fall every year during Jun in O-Fallon.
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Jul : Temperature in O-Fallon is at its peak during Jul. In Jul, temperature during day raise upto 32 C° and temperature during night goes down upto 19 C°. Jul is one of the rainy months in O-Fallon. According to past year record, there is 11.23cm rain fall every year during Jul in O-Fallon. So if you are planing to visit O-Fallon during Jul, umbrella is worth considering.
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Aug : Aug is one of the hot months in O-Fallon. During Aug month, highest temperature is 31 C° and lowest temperature is 18 C°. Aug is one of the rainy months in O-Fallon. According to past year record, there is 9.16cm rain fall every year during Aug in O-Fallon.
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Sep : O-Fallon weather in Sep is good. In O-Fallon during Sep, day temperature raise upto 27 C° and night temperature goes down upto 13 C°. Sep is one of the rainy months in O-Fallon. According to past year record, there is 8.64cm rain fall every year during Sep in O-Fallon.
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Oct : In Oct, temperature during day raise upto 20 C° and temperature during night goes down upto 7 C°. Oct is one of the rainy months in O-Fallon. According to past year record, there is 8.84cm rain fall every year during Oct in O-Fallon.
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Nov : During Nov month, highest temperature is 13 C° and lowest temperature is 1 C°. Nov is one of the rainy months in O-Fallon. According to past year record, there is 9.33cm rain fall every year during Nov in O-Fallon.
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Dec : In O-Fallon during Dec, day temperature raise upto 6 C° and night temperature goes down upto -4 C°. Dec is one of the snowy months in O-Fallon. According to past year record, there is 7.4cm snow fall every year during Dec in O-Fallon.
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