Ada, OK 74820 Frost Dates
74820, near Ada, OK: the frost window
Typically, the last spring freeze lands around 04/02, roughly 217 days out. Fall's first freeze usually shows up around 11/04, roughly 217 days after the last spring frost.
Ada 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
Ada's growing season runs out in roughly 10 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
How much risk comes with planting early here
04/02 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/14 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/18 and only about 1 year in 10 sees frost after that.
Ada against the rest of the dataset
About 217 days separate Ada's last and first frost, putting it 13,427 of 40,283 ZIP codes nationally. Within OK, it ranks 249 of 764.
Learn more
Two guides worth reading on 74820: zone vs. frost date, on why Zone 7b and Ada's frost date answer different questions, and the frost range, on how to read the range around Ada's dates instead of trusting one.