Lamont, IA 50650 Frost Dates
Lamont, IA: when does the frost end?
Typically, the last spring freeze lands around 04/27, roughly 242 days out. Fall's first freeze usually shows up around 10/13, roughly 169 days after the last spring frost.
Lamont sits in USDA Zone 5a (-20 to -15°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
Stretching the season past the first frost
With roughly 7 weeks until Lamont's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lamont's last frost
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Lamont against the rest of the dataset
At roughly 169 frost-free days, Lamont places 29,570 of 40,283 ZIP codes in this dataset. Within IA, it ranks 339 of 1,042.
Learn more
Before leaning on 50650's figures: zone vs. frost date explains why Zone 5a and Lamont's frost date answer different questions, while the frost range explains how to read the range around Lamont's dates instead of trusting one.