Richfield, MN 55419 Frost Dates
Richfield, MN: when does the frost end?
The last spring frost here typically falls around 04/23, about 238 days from today. Fall's first freeze usually shows up around 10/18, roughly 176 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 Richfield, not a forecast for this year.
Stretching the season past the first frost
With roughly 7 weeks until Richfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Richfield's last frost
04/23 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Richfield against the rest of the dataset
At roughly 176 frost-free days, Richfield places 26,371 of 40,283 ZIP codes in this dataset. Within MN, it ranks 38 of 943.
Learn more
Before leaning on 55419's figures: local microclimates explains what one yard in Richfield can differ from the 55419 normal, while zone vs. frost date explains why Zone 5a and Richfield's frost date answer different questions.