Frost Dates for 47108 — Campbellsburg, Indiana

Half of springs at Salem, IN see their last 32°F night by April 17; only one in ten is past it by April 2, and one in ten still has one after May 4. Planting tender crops after April 24 leaves a 30% risk of a frost on them, after April 29 20%, and after May 4 10%. The 17 days between the even-odds date and the one-in-ten date is wider than at 66% of the 125 Indiana stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 22 in half of years, as early as October 7 one year in ten, and holds off past November 2 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 22, 12 days before the 32°F one. The freeze-free season lasts 186 days in a typical year, longer than at 62% of the 125 Indiana stations; it reaches 207 days one year in ten and falls short of 165 one year in ten. On average 103 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 29, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 7 and March 2.

July is the warmest month at Salem, IN, averaging 87°F by day and 65°F at night; January is the coldest at 41°F and 24°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 89% of years and May still brings one in 15% of years.

Warmth for growing adds up to 3,900 growing degree days a year (base 50°F), more than at 80% of the 125 Indiana stations. 37% of them (1,450) have built up by the end of June, and July adds the most, 797. Precipitation totals 46.9 inches a year, most in May (5.2") and least in October (3.0"); May to September bring 43% of it.

The nearest other station, Paoli, IN, 14 miles southwest of Campbellsburg and 225 feet lower, has a last frost 4 days later (April 21), a first frost 4 days earlier (October 18), a season 8 days shorter.

The first measurable snow (0.1 inch or more) in Campbellsburg usually arrives around December 13, and the last of the season around March 9. Those are the middle dates across the winters of 1991–2020 at Salem, IN, 9.8 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 39 days after the last snow.

ZIP 47108 is 10 miles from Salem, IN, which stands at 785 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station; its figures are presented in full for 47167 (Salem). The 2023 USDA Plant Hardiness Zone Map lists ZIP 47108 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.