St. Francisville, IL 62460 Frost Dates
St. Francisville, IL: when does the frost end?
Around 04/12 is the usual last spring frost, about 227 days away. Fall's first freeze usually shows up around 10/25, roughly 193 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts St. Francisville in Zone 6b (-5 to 0°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
With roughly 8 weeks until St. Francisville's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around St. Francisville's last frost
04/12 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/31 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/30 and only about 1 year in 10 sees frost after that.
St. Francisville against the rest of the dataset
At roughly 193 frost-free days, St. Francisville places 20,050 of 40,283 ZIP codes in this dataset. Within IL, it ranks 408 of 1,548.
Learn more
Before leaning on 62460's figures: local microclimates explains what one yard in St. Francisville can differ from the 62460 normal, while zone vs. frost date explains why Zone 6b and St. Francisville's frost date answer different questions.