Tiskilwa, IL 61368 Frost Dates
Tiskilwa, IL: when does the frost end?
The last spring frost here typically falls around 04/22, about 237 days from today. Fall's first freeze usually shows up around 10/17, roughly 177 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Tiskilwa in Zone 5b (-15 to -10°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 7 weeks until Tiskilwa's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Tiskilwa's last frost
04/22 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 05/07 and only about 1 year in 10 sees frost after that.
Tiskilwa against the rest of the dataset
Tiskilwa's growing season runs about 177 days, ranking 26,206 of 40,283 US ZIP codes measured here, longest to shortest. Within IL, it ranks 1,134 of 1,548.
Learn more
Before leaning on 61368's figures: the frost range explains how to read the range around Tiskilwa's dates instead of trusting one, while local microclimates explains what one yard in Tiskilwa can differ from the 61368 normal.