Delphos, OH 45833 Frost Dates
45833, near Delphos, OH: the frost window
Typically, the last spring freeze lands around 04/22, roughly 237 days out. Fall's first freeze usually shows up around 10/22, roughly 181 days after the last spring frost.
Delphos sits in USDA Zone 6a (-10 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
Delphos's growing season runs out in roughly 8 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/22 isn't a guarantee
04/22 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Delphos against the rest of the dataset
Delphos's growing season runs about 181 days, ranking 24,495 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 762 of 1,383.
Learn more
Two guides worth reading on 45833: the frost range, on how to read the range around Delphos's dates instead of trusting one, and local microclimates, on what one yard in Delphos can differ from the 45833 normal.