Frost Dates for 68152 — Omaha, Nebraska

Half of springs at Omaha #1, NE see their last 32°F night by April 16; only one in ten is past it by April 2, and one in ten still has one after May 6. Planting tender crops after April 25 leaves a 30% risk of a frost on them, after May 1 20%, and after May 6 10%. The 20 days between the even-odds date and the one-in-ten date is the widest of the 68 Nebraska 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 2 one year in ten, and holds off past October 29 one year in ten. A hard freeze of 28°F follows 8 days later, around October 26; in spring the one-in-ten date for 28°F is April 22, 14 days before the 32°F one. The freeze-free season lasts 183 days in a typical year, longer than at 96% of the 68 Nebraska stations; it reaches 203 days one year in ten and falls short of 159 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 16 days longer, to about May 2, and return around October 9. Severe cold of 16°F or below comes every winter, usually between November 21 and March 13.

July is the warmest month at Omaha #1, NE, averaging 85°F by day and 66°F at night; January is the coldest at 32°F and 15°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 21% of years.

Warmth for growing adds up to 3,493 growing degree days a year (base 50°F), more than at 78% of the 68 Nebraska stations. 35% of them (1,218) have built up by the end of June, and July adds the most, 798.

The nearest other station, Omaha Eppley Airfield, NE, 6 miles southeast of Omaha and 298 feet lower, has a last frost 2 days later (April 18), a first frost 3 days later (October 21), a season 2 days longer.

The first measurable snow (0.1 inch or more) in Omaha usually arrives around November 21, and the last of the season around March 25. Those are the middle dates across the winters of 1991–2020 at Omaha Eppley Airfield, NE, 5.8 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 22 days after the last snow.

ZIP 68152 is 1 mile from Omaha #1, NE, which stands at 1,280 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 10 other ZIP codes share the station; its figures are presented in full for 68104 (Omaha). The 2023 USDA Plant Hardiness Zone Map lists ZIP 68152 in zone 5b, the band where the coldest night of the year averaged -15 to -10°F (-26.1 to -23.3°C) over 1991–2020; a zone describes winter lows, not frost dates.