Modesto, IL 62667 Frost Dates
Modesto, IL: when does the frost end?
Typically, the last spring freeze lands around 04/07, roughly 222 days out. Fall's first freeze usually shows up around 10/29, roughly 205 days after the last spring frost.
Modesto sits in USDA Zone 6b (-5 to 0°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 9 weeks until Modesto's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/07 isn't a guarantee
04/07 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/22 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/21 and only about 1 year in 10 sees frost after that.
Modesto against the rest of the dataset
About 205 days separate Modesto's last and first frost, putting it 16,420 of 40,283 ZIP codes nationally. Within IL, it ranks 122 of 1,548.
Learn more
Before leaning on 62667's figures: zone vs. frost date explains why Zone 6b and Modesto's frost date answer different questions, while the frost range explains how to read the range around Modesto's dates instead of trusting one.