Reinbeck, IA 50669 Frost Dates
Reinbeck, IA: when does the frost end?
Typically, the last spring freeze lands around 04/29, roughly 244 days out. Fall's first freeze usually shows up around 10/09, roughly 160 days after the last spring frost.
Reinbeck sits in USDA Zone 5a (-20 to -15°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
With roughly 6 weeks until Reinbeck's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/29 isn't a guarantee
04/29 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/12 and only about 1 year in 10 sees frost after that.
Reinbeck against the rest of the dataset
Reinbeck's growing season runs about 160 days, ranking 32,398 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 759 of 1,042.
Learn more
Before leaning on 50669's figures: zone vs. frost date explains why Zone 5a and Reinbeck's frost date answer different questions, while the frost range explains how to read the range around Reinbeck's dates instead of trusting one.