Battle Creek, IA 51006 Frost Dates
51006, near Battle Creek, IA: the frost window
Around 05/01 is the usual last spring frost, about 246 days away. Fall's first freeze usually shows up around 10/01, roughly 153 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 Battle Creek, not a forecast for this year.
Stretching the season past the first frost
Battle Creek'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.
Why 05/01 isn't a guarantee
05/01 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/18 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/15 and only about 1 year in 10 sees frost after that.
Battle Creek against the rest of the dataset
Battle Creek's growing season runs about 153 days, ranking 34,585 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 929 of 1,042.
Learn more
Two guides worth reading on 51006: local microclimates, on what one yard in Battle Creek can differ from the 51006 normal, and zone vs. frost date, on why Zone 5a and Battle Creek's frost date answer different questions.