Frost Dates for 62468 — Toledo, Illinois

Half of springs at Neoga 4NW, IL see their last 32°F night by April 16; only one in ten is past it by April 3, and one in ten still has one after April 29. Planting tender crops after April 21 leaves a 30% risk of a frost on them, after April 24 20%, and after April 29 10%. The 13 days between the even-odds date and the one-in-ten date is the narrowest of the 158 Illinois stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 20 in half of years, as early as October 4 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 10 days later, around October 30; in spring the one-in-ten date for 28°F is April 19, 10 days before the 32°F one. The freeze-free season lasts 185 days in a typical year, longer than at 50% of the 158 Illinois stations; it reaches 205 days one year in ten and falls short of 163 one year in ten. On average 122 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 9 days longer, to about April 25, and return around October 8. Severe cold of 16°F or below comes every winter, usually between December 3 and March 4.

July is the warmest month at Neoga 4NW, IL, averaging 87°F by day and 65°F at night; January is the coldest at 37°F and 19°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month.

Warmth for growing adds up to 3,752 growing degree days a year (base 50°F), more than at 71% of the 158 Illinois stations. 37% of them (1,395) have built up by the end of June, and July adds the most, 806. Precipitation totals 42.0 inches a year, most in June (4.8") and least in February (2.1"); May to September bring 48% of it.

The nearest other station, Mattoon, IL, 15 miles north of Toledo, has a last frost 5 days earlier (April 11), a first frost 9 days later (October 29), a season 14 days longer.

The first measurable snow (0.1 inch or more) in Toledo usually arrives around December 5, and the last of the season around March 7. Those are the middle dates across the winters of 1991–2020 at Mattoon, IL, 14.7 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 40 days after the last snow.

ZIP 62468 is 14 miles from Neoga 4NW, IL, which stands at 643 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 62447 (Neoga). The 2023 USDA Plant Hardiness Zone Map lists ZIP 62468 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.