Worthington, MN 56187 Frost Dates
Worthington, MN: when does the frost end?
The last spring frost here typically falls around 05/03, about 248 days from today. Fall's first freeze usually shows up around 10/04, 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 Worthington, not a forecast for this year.
Stretching the season past the first frost
With roughly 5 weeks until Worthington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/19 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.
Worthington against the rest of the dataset
Worthington's growing season runs about 153 days, ranking 34,490 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 401 of 943.
Learn more
Before leaning on 56187's figures: local microclimates explains what one yard in Worthington can differ from the 56187 normal, while zone vs. frost date explains why Zone 5a and Worthington's frost date answer different questions.