Frost Dates for 46902 — Kokomo, Indiana

Half of springs at Kokomo 3 WSW, IN see their last 32°F night by April 27; only one in ten is past it by April 13, and one in ten still has one after May 13. Planting tender crops after May 3 leaves a 30% risk of a frost on them, after May 6 20%, and after May 13 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 35% of the 125 Indiana stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 18 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 11 days later, around October 29; in spring the one-in-ten date for 28°F is May 1, 12 days before the 32°F one. The freeze-free season lasts 174 days in a typical year, shorter than at 72% of the 125 Indiana stations; it reaches 194 days one year in ten and falls short of 152 one year in ten. On average 131 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 May 6, and return around October 8. Severe cold of 16°F or below comes every winter, usually between December 1 and March 13.

July is the warmest month at Kokomo 3 WSW, IN, averaging 84°F by day and 63°F at night; January is the coldest at 33°F and 17°F. A freezing night is all but certain in every month from November 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 37% of years.

Warmth for growing adds up to 3,181 growing degree days a year (base 50°F), fewer than at 66% of the 125 Indiana stations. 36% of them (1,134) have built up by the end of June, and July adds the most, 716. Precipitation totals 44.5 inches a year, most in June (5.2") and least in February (2.4"); May to September bring 50% of it.

The nearest other station, Young America, IN, 14 miles northwest of Kokomo, has a last frost 2 days earlier (April 25), a first frost 1 day earlier (October 17).

The first measurable snow (0.1 inch or more) in Kokomo usually arrives around November 23, and the last of the season around April 2. Those are the middle dates across the winters of 1991–2020 at Kokomo 3 WSW, IN, 2.9 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 25 days after the last snow.

ZIP 46902 is 3 miles from Kokomo 3 WSW, IN, which stands at 822 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 46901 (Kokomo). The 2023 USDA Plant Hardiness Zone Map lists ZIP 46902 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.