Frost Dates for 62568 — Taylorville, Illinois

Half of springs at Morrisonville, IL see their last 32°F night by April 12; only one in ten is past it by March 29, and one in ten still has one after April 27. Planting tender crops after April 17 leaves a 30% risk of a frost on them, after April 21 20%, and after April 27 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 54% 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 5 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 11 days later, around October 31; in spring the one-in-ten date for 28°F is April 16, 11 days before the 32°F one. The freeze-free season lasts 190 days in a typical year, longer than at 66% of the 158 Illinois stations; it reaches 211 days one year in ten and falls short of 169 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 12 days longer, to about April 24, and return around October 9. Severe cold of 16°F or below comes every winter, usually between December 4 and March 5.

July is the warmest month at Morrisonville, IL, averaging 86°F by day and 66°F at night; January is the coldest at 36°F and 19°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 84% of years.

Warmth for growing adds up to 3,803 growing degree days a year (base 50°F), more than at 73% of the 158 Illinois stations. 37% of them (1,403) have built up by the end of June, and July adds the most, 808. Precipitation totals 38.1 inches a year, most in May (4.6") and least in February (1.8"); May to September bring 49% of it.

The nearest other station, Pana, IL, 17 miles southeast of Taylorville, has a last frost 5 days later (April 17), a first frost 3 days later (October 23), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Taylorville usually arrives around December 7, and the last of the season around March 6. Those are the middle dates across the winters of 1991–2020 at Kincaid 3W, IL, 8.9 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 37 days after the last snow.

ZIP 62568 is 13 miles from Morrisonville, IL, which stands at 630 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 62568 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.