Cheyenne, OK 73628 Frost Dates
Cheyenne, OK: when does the frost end?
Around 04/15 is the usual last spring frost, about 230 days away. Fall's first freeze usually shows up around 10/27, roughly 194 days after the last spring frost.
Cheyenne sits in USDA Zone 7a (0 to 5°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 9 weeks until Cheyenne's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/15 isn't a guarantee
04/15 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/01 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/29 and only about 1 year in 10 sees frost after that.
Cheyenne against the rest of the dataset
Cheyenne's growing season runs about 194 days, ranking 19,555 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 722 of 764.
Learn more
Before leaning on 73628's figures: the frost range explains how to read the range around Cheyenne's dates instead of trusting one, while local microclimates explains what one yard in Cheyenne can differ from the 73628 normal.