Frost Dates for 73012 — Edmond, Oklahoma

Half of springs at Velma 7NW Mesonet, OK see their last 32°F night by March 28; only one in ten is past it by March 6, and one in ten still has one after April 18. Planting tender crops after April 5 leaves a 30% risk of a frost on them, after April 9 20%, and after April 18 10%. The 21 days between the even-odds date and the one-in-ten date is the widest of the 114 Oklahoma stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.

In fall the first 32°F night comes by November 7 in half of years, as early as October 23 one year in ten, and holds off past November 21 one year in ten. A hard freeze of 28°F follows 9 days later, around November 16; in spring the one-in-ten date for 28°F is April 3, 15 days before the 32°F one. The freeze-free season lasts 227 days in a typical year, longer than at 91% of the 114 Oklahoma stations; it reaches 249 days one year in ten and falls short of 198 one year in ten. On average 65 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 9, and return around October 29. Severe cold of 16°F or below comes in 90% of winters, usually between December 24 and January 29.

July is the warmest month at Velma 7NW Mesonet, OK, averaging 94°F by day and 72°F at night; January is the coldest at 52°F and 30°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 41% of years.

Warmth for growing adds up to 5,485 growing degree days a year (base 50°F), more than at 89% of the 114 Oklahoma stations. 39% of them (2,116) have built up by the end of June, and July adds the most, 1,020.

The nearest other station, Duncan, OK, 6 miles west of Edmond, has a last frost 3 days earlier (March 25), the same first-frost date, a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Edmond usually arrives around December 24, and the last of the season around February 11. Those are the middle dates across the winters of 1991–2020 at Marlow 1 WSW, OK, 12.7 miles away: half of years saw snow earlier, half later. Snow fell in 93% of those winters. The last 32°F night of spring typically comes 45 days after the last snow.

ZIP 73012 is 6 miles from Velma 7NW Mesonet, OK, which stands at 1,118 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73012 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020; a zone describes winter lows, not frost dates.