Koshkonong, MO 65692 Frost Dates
65692, near Koshkonong, MO: the frost window
The last spring frost here typically falls around 04/17, about 232 days from today. Fall's first freeze usually shows up around 10/21, roughly 187 days after the last spring frost.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Koshkonong, not a forecast for this year.
Stretching the season past the first frost
Koshkonong'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.
The actual range around Koshkonong's last frost
04/17 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/30 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/01 and only about 1 year in 10 sees frost after that.
Koshkonong against the rest of the dataset
Koshkonong's growing season runs about 187 days, ranking 22,616 of 40,283 US ZIP codes measured here, longest to shortest. Within MO, it ranks 863 of 1,129.
Learn more
Two guides worth reading on 65692: local microclimates, on what one yard in Koshkonong can differ from the 65692 normal, and zone vs. frost date, on why Zone 7a and Koshkonong's frost date answer different questions.