Rush City, MN 55069 Frost Dates
Frost dates for Rush City, MN, ZIP 55069
Typically, the last spring freeze lands around 05/11, roughly 256 days out. The first fall frost typically arrives around 10/01, about 141 frost-free days later.
The USDA Plant Hardiness Zone Map puts Rush City in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4b around Rush City has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
How much risk comes with planting early here
05/11 is the middle of 30 years of NOAA records, not a promise. Plant by 04/27 and you're betting against frost in roughly 9 years out of 10. 05/28 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Rush City compares
At roughly 141 frost-free days, Rush City places 36,910 of 40,283 ZIP codes in this dataset. Within MN, it ranks 717 of 943.
Learn more
zone vs. frost date explains why Zone 4b and Rush City's frost date answer different questions, and the frost range explains how to read the range around Rush City's dates instead of trusting one.