Frost Dates for 47272 — Saint Paul, Indiana

Half of springs at Greensburg, IN see their last 32°F night by April 15; only one in ten is past it by March 31, and one in ten still has one after May 2. Planting tender crops after April 21 leaves a 30% risk of a frost on them, after April 26 20%, and after May 2 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 26 in half of years, as early as October 12 one year in ten, and holds off past November 7 one year in ten. A hard freeze of 28°F follows 10 days later, around November 5; in spring the one-in-ten date for 28°F is April 19, 13 days before the 32°F one. The freeze-free season lasts 194 days in a typical year, longer than at 78% of the 125 Indiana stations; it reaches 212 days one year in ten and falls short of 172 one year in ten. On average 109 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 11 days longer, to about April 26, and return around October 16. Severe cold of 16°F or below comes every winter, usually between December 9 and March 2.

July is the warmest month at Greensburg, IN, averaging 85°F by day and 66°F at night; January is the coldest at 36°F and 22°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 87% of years and May still brings one in 12% of years.

Warmth for growing adds up to 3,710 growing degree days a year (base 50°F), more than at 70% of the 125 Indiana stations. 37% of them (1,370) have built up by the end of June, and July adds the most, 787. Precipitation totals 47.1 inches a year, most in June (5.4") and least in February (2.8"); May to September bring 46% of it.

The nearest other station, Shelbyville Sewage Plt, IN, 12 miles northwest of Saint Paul and 185 feet lower, has a last frost 2 days later (April 17), a first frost 4 days earlier (October 22), a season 7 days shorter.

The first measurable snow (0.1 inch or more) in Saint Paul usually arrives around December 12, and the last of the season around March 6. Those are the middle dates across the winters of 1991–2020 at Greensburg, IN, 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 40 days after the last snow.

ZIP 47272 is 9 miles from Greensburg, IN, which stands at 937 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 47240 (Greensburg). The 2023 USDA Plant Hardiness Zone Map lists ZIP 47272 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.