Vandalia, IL 62471 Frost Dates
Vandalia, IL: when does the frost end?
The last spring frost here typically falls around 04/03, about 218 days from today. Fall's first freeze usually shows up around 10/24, roughly 202 days after the last spring frost.
Vandalia 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 8 weeks until Vandalia's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
04/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 03/19 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 04/25 and only about 1 year in 10 sees frost after that.
Vandalia against the rest of the dataset
Vandalia's growing season runs about 202 days, ranking 17,220 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 176 of 1,548.
Learn more
Before leaning on 62471's figures: the frost range explains how to read the range around Vandalia's dates instead of trusting one, while local microclimates explains what one yard in Vandalia can differ from the 62471 normal.