Winfield, IA 52644 Frost Dates
52644, near Winfield, IA: the frost window
Around 04/30 is the usual last spring frost, about 245 days away. Fall's first freeze usually shows up around 10/10, roughly 163 days after the last spring frost.
Winfield sits in USDA Zone 5b (-15 to -10°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
Winfield'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.
How much risk comes with planting early here
04/30 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 05/14 and only about 1 year in 10 sees frost after that.
Winfield against the rest of the dataset
Winfield's growing season runs about 163 days, ranking 31,463 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 668 of 1,042.
Learn more
Two guides worth reading on 52644: the frost range, on how to read the range around Winfield's dates instead of trusting one, and local microclimates, on what one yard in Winfield can differ from the 52644 normal.