Average First Frost Dates for Wyoming

About First Frost Dates in Wyoming

First Frost Dates were calculated using daily climate data from the period between 1991-2020.

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Interactive Map of Average First Frost Dates for Wyoming

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Wyoming First Frost Dates

Year Round Frost
July 11 - 20
July 21 - 31
August 1 - 10
August 11 - 20
August 21 - 31
September 1 - 10
September 11 - 20
September 21 - 30
October 1 - 10
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List of Average First Frost Dates for Locations in Wyoming

LocationAverage First Frost Dates
CasperSeptember 21 - 30
CheyenneOctober 1 - 10
CodyOctober 1 - 10
DouglasSeptember 21 - 30
EvanstonSeptember 1 - 10
GilletteSeptember 21 - 30
Green RiverSeptember 11 - 20
JacksonJuly 21 - 31
LanderOctober 1 - 10
LaramieSeptember 1 - 10
PowellSeptember 11 - 20
RanchettesOctober 1 - 10
RawlinsSeptember 11 - 20
RivertonSeptember 21 - 30
Rock SpringsSeptember 21 - 30
SheridanSeptember 21 - 30
TorringtonSeptember 11 - 20

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