Jan : Temperature in Herndon is lowest during Jan. In Jan, temperature during day raise upto 6 C° and temperature during night goes down upto -4 C°. Jan is one of the snowy months in Herndon. According to past year record, there is 7.13cm snow fall every year during Jan in Herndon.
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Feb : Temperature in Herndon is lowest during Feb. During Feb month, highest temperature is 8 C° and lowest temperature is -4 C°. Feb is one of the snowy months in Herndon. According to past year record, there is 6.81cm snow fall every year during Feb in Herndon.
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Mar : In Herndon during Mar, day temperature raise upto 13 C° and night temperature goes down upto 0 C°. Mar is one of the rainy months in Herndon. According to past year record, there is 8.56cm rain fall every year during Mar in Herndon.
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Apr : In Apr, temperature during day raise upto 19 C° and temperature during night goes down upto 6 C°. Apr is one of the rainy months in Herndon. According to past year record, there is 8.63cm rain fall every year during Apr in Herndon.
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May : During May month, highest temperature is 24 C° and lowest temperature is 11 C°. May is one of the rainy months in Herndon. According to past year record, there is 10.86cm rain fall every year during May in Herndon. So if you are planing to visit Herndon during May, umbrella is worth considering.
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Jun : Jun is one of the hot months in Herndon. In Herndon during Jun, day temperature raise upto 28 C° and night temperature goes down upto 16 C°. Jun is one of the rainy months in Herndon. According to past year record, there is 9.36cm rain fall every year during Jun in Herndon.
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Jul : Temperature in Herndon is at its peak during Jul. In Jul, temperature during day raise upto 31 C° and temperature during night goes down upto 18 C°. Jul is one of the rainy months in Herndon. According to past year record, there is 9.18cm rain fall every year during Jul in Herndon.
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Aug : Aug is one of the hot months in Herndon. During Aug month, highest temperature is 30 C° and lowest temperature is 18 C°. Aug is one of the rainy months in Herndon. According to past year record, there is 8.9cm rain fall every year during Aug in Herndon.
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Sep : Herndon weather in Sep is good. In Herndon during Sep, day temperature raise upto 26 C° and night temperature goes down upto 13 C°. Sep is one of the rainy months in Herndon. According to past year record, there is 9.39cm rain fall every year during Sep in Herndon.
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Oct : In Oct, temperature during day raise upto 20 C° and temperature during night goes down upto 6 C°. Oct is one of the rainy months in Herndon. According to past year record, there is 8.72cm rain fall every year during Oct in Herndon.
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Nov : During Nov month, highest temperature is 14 C° and lowest temperature is 2 C°. Nov is one of the rainy months in Herndon. According to past year record, there is 8.22cm rain fall every year during Nov in Herndon.
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Dec : In Herndon during Dec, day temperature raise upto 8 C° and night temperature goes down upto -3 C°. Dec is one of the snowy months in Herndon. According to past year record, there is 7.25cm snow fall every year during Dec in Herndon.
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