Frost Dates for 46710 — Avilla, Indiana

Half of springs at Garrett, IN see their last 32°F night by April 29; only one in ten is past it by April 15, and one in ten still has one after May 11. Planting tender crops after May 4 leaves a 30% risk of a frost on them, after May 7 20%, and after May 11 10%. The 12 days between the even-odds date and the one-in-ten date is the narrowest of the 125 Indiana stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 17 in half of years, as early as October 4 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 12 days later, around October 29; in spring the one-in-ten date for 28°F is May 3, 8 days before the 32°F one. The freeze-free season lasts 171 days in a typical year, shorter than at 84% of the 125 Indiana stations; it reaches 189 days one year in ten and falls short of 151 one year in ten. On average 136 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 8 days longer, to about May 7, and return around October 6. Severe cold of 16°F or below comes every winter, usually between December 2 and March 16.

July is the warmest month at Garrett, IN, averaging 84°F by day and 62°F at night; January is the coldest at 32°F and 17°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 43% of years.

Warmth for growing adds up to 2,958 growing degree days a year (base 50°F), fewer than at 93% of the 125 Indiana stations. 34% of them (1,010) have built up by the end of June, and July adds the most, 714. Precipitation totals 38.2 inches a year, most in May (4.5") and least in February (2.2"); May to September bring 50% of it.

The nearest other station, Garrett 1 S, IN, 7 miles east of Avilla, has a last frost 3 days later (May 2), a first frost 7 days earlier (October 10), a season 12 days shorter.

The first measurable snow (0.1 inch or more) in Avilla usually arrives around November 17, and the last of the season around March 31. Those are the middle dates across the winters of 1991–2020 at Garrett 1 S, IN, 6.5 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 29 days after the last snow.

ZIP 46710 is 6 miles from Garrett, IN, which stands at 880 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 46755 (Kendallville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 46710 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.