Cambridge, IL 61238 Frost Dates
Cambridge, IL: when does the frost end?
Around 04/20 is the usual last spring frost, about 235 days away. Fall's first freeze usually shows up around 10/20, roughly 180 days after the last spring frost.
Zone 5b (-15 to -10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Cambridge, not a forecast for this year.
Stretching the season past the first frost
With roughly 8 weeks until Cambridge's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Cambridge's last frost
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/06 and only about 1 year in 10 sees frost after that.
Cambridge against the rest of the dataset
At roughly 180 frost-free days, Cambridge places 24,894 of 40,283 ZIP codes in this dataset. Within IL, it ranks 962 of 1,548.
Learn more
Before leaning on 61238's figures: the frost range explains how to read the range around Cambridge's dates instead of trusting one, while local microclimates explains what one yard in Cambridge can differ from the 61238 normal.