Howe, OK 74940 Frost Dates
74940, near Howe, OK: the frost window
Around 04/06 is the usual last spring frost, about 221 days away. Fall's first freeze usually shows up around 11/02, roughly 210 days after the last spring frost.
Howe sits in USDA Zone 7b (5 to 10°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
Howe's growing season runs out in roughly 9 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/06 isn't a guarantee
04/06 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/24 and only about 1 year in 10 sees frost after that.
Howe against the rest of the dataset
About 210 days separate Howe's last and first frost, putting it 15,085 of 40,283 ZIP codes nationally. Within OK, it ranks 480 of 764.
Learn more
Two guides worth reading on 74940: the frost range, on how to read the range around Howe's dates instead of trusting one, and local microclimates, on what one yard in Howe can differ from the 74940 normal.