Burlington, IL 60109 Frost Dates
Burlington, IL: when does the frost end?
The last spring frost here typically falls around 04/24, about 239 days from today. Fall's first freeze usually shows up around 10/18, roughly 177 days after the last spring frost.
Burlington sits in USDA Zone 5b (-15 to -10°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 Burlington's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Burlington's last frost
04/24 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/09 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.
Burlington against the rest of the dataset
About 177 days separate Burlington's last and first frost, putting it 26,224 of 40,283 ZIP codes nationally. Within IL, it ranks 1,137 of 1,548.
Learn more
Before leaning on 60109's figures: the frost range explains how to read the range around Burlington's dates instead of trusting one, while local microclimates explains what one yard in Burlington can differ from the 60109 normal.