Rice Lake, MN 55803 Frost Dates
55803, near Rice Lake, MN: the frost window
Around 05/21 is the usual last spring frost, about 266 days away. Fall's first freeze usually shows up around 09/27, roughly 129 days after the last spring frost.
Zone 4a (-30 to -25°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 Rice Lake, not a forecast for this year.
Stretching the season past the first frost
Rice Lake's growing season runs out in roughly 4 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
The actual range around Rice Lake's last frost
05/21 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/03 and only about 1 year in 10 sees frost after that.
Rice Lake against the rest of the dataset
About 129 days separate Rice Lake's last and first frost, putting it 38,458 of 40,283 ZIP codes nationally. Within MN, it ranks 863 of 943.
Learn more
Two guides worth reading on 55803: local microclimates, on what one yard in Rice Lake can differ from the 55803 normal, and zone vs. frost date, on why Zone 4a and Rice Lake's frost date answer different questions.