Cleghorn, IA 51014 Frost Dates
51014, near Cleghorn, IA: the frost window
The last spring frost here typically falls around 05/04, about 249 days from today. Fall's first freeze usually shows up around 10/04, roughly 152 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 Cleghorn, not a forecast for this year.
Stretching the season past the first frost
Cleghorn's growing season runs out in roughly 5 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 Cleghorn's last frost
05/04 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/17 and only about 1 year in 10 sees frost after that.
Cleghorn against the rest of the dataset
At roughly 152 frost-free days, Cleghorn places 34,894 of 40,283 ZIP codes in this dataset. Within IA, it ranks 959 of 1,042.
Learn more
Two guides worth reading on 51014: zone vs. frost date, on why Zone 5a and Cleghorn's frost date answer different questions, and the frost range, on how to read the range around Cleghorn's dates instead of trusting one.