Belvidere, IL 61038 Frost Dates
Belvidere, IL: when does the frost end?
The last spring frost here typically falls around 04/28, about 243 days from today. Fall's first freeze usually shows up around 10/12, roughly 166 days after the last spring frost.
Belvidere 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 6 weeks until Belvidere's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
The actual range around Belvidere's last frost
04/28 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/15 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/14 and only about 1 year in 10 sees frost after that.
Belvidere against the rest of the dataset
At roughly 166 frost-free days, Belvidere places 30,300 of 40,283 ZIP codes in this dataset. Within IL, it ranks 1,466 of 1,548.
Learn more
Before leaning on 61038's figures: local microclimates explains what one yard in Belvidere can differ from the 61038 normal, while zone vs. frost date explains why Zone 5b and Belvidere's frost date answer different questions.