Ogden, IA 50212 Frost Dates
50212, near Ogden, IA: the frost window
The last spring frost here typically falls around 04/28, about 243 days from today. Fall's first freeze usually shows up around 10/12, roughly 165 days after the last spring frost.
Zone 5a (-20 to -15°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 Ogden, not a forecast for this year.
Stretching the season past the first frost
Ogden's growing season runs out in roughly 6 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 Ogden's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/13 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Ogden against the rest of the dataset
About 165 days separate Ogden's last and first frost, putting it 30,607 of 40,283 ZIP codes nationally. Within IA, it ranks 507 of 1,042.
Learn more
Two guides worth reading on 50212: zone vs. frost date, on why Zone 5a and Ogden's frost date answer different questions, and the frost range, on how to read the range around Ogden's dates instead of trusting one.