Luxemburg, IA 52056 Frost Dates
52056, near Luxemburg, IA: the frost window
The last spring frost here typically falls around 04/21, about 236 days from today. Fall's first freeze usually shows up around 10/18, roughly 178 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 Luxemburg, not a forecast for this year.
Stretching the season past the first frost
Luxemburg's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/21 isn't a guarantee
04/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/07 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Luxemburg against the rest of the dataset
Luxemburg's growing season runs about 178 days, ranking 25,920 of 40,283 US ZIP codes measured here, longest to shortest. Within IA, it ranks 121 of 1,042.
Learn more
Two guides worth reading on 52056: local microclimates, on what one yard in Luxemburg can differ from the 52056 normal, and zone vs. frost date, on why Zone 5a and Luxemburg's frost date answer different questions.