Lytton, IA 50561 Frost Dates
Lytton, IA: when does the frost end?
The last spring frost here typically falls around 04/30, about 245 days from today. Fall's first freeze usually shows up around 10/06, roughly 158 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 Lytton, not a forecast for this year.
Stretching the season past the first frost
With roughly 6 weeks until Lytton's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Lytton's last frost
04/30 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/11 and only about 1 year in 10 sees frost after that.
Lytton against the rest of the dataset
About 158 days separate Lytton's last and first frost, putting it 33,138 of 40,283 ZIP codes nationally. Within IA, it ranks 823 of 1,042.
Learn more
Before leaning on 50561's figures: zone vs. frost date explains why Zone 5a and Lytton's frost date answer different questions, while the frost range explains how to read the range around Lytton's dates instead of trusting one.