Frost Dates for 73036 — El Reno, Oklahoma

Half of springs at El Reno 1 N, OK see their last 32°F night by April 6; only one in ten is past it by March 21, and one in ten still has one after April 22. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 16 20%, and after April 22 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 61% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 31 in half of years, as early as October 15 one year in ten, and holds off past November 13 one year in ten. A hard freeze of 28°F follows 7 days later, around November 7; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 206 days in a typical year, shorter than at 71% of the 114 Oklahoma stations; it reaches 227 days one year in ten and falls short of 185 one year in ten. On average 76 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 17, and return around October 21. Severe cold of 16°F or below comes every winter, usually between December 12 and February 23.

July is the warmest month at El Reno 1 N, OK, averaging 94°F by day and 70°F at night; January is the coldest at 49°F and 25°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 69% of years.

Warmth for growing adds up to 4,796 growing degree days a year (base 50°F), fewer than at 87% of the 114 Oklahoma stations. 37% of them (1,770) have built up by the end of June, and July adds the most, 986. Precipitation totals 34.5 inches a year, most in June (5.6") and least in January (0.9"); May to September bring 59% of it.

The nearest other station, Minco 2SSW Mesonet, OK, 17 miles south of El Reno, has a last frost 3 days earlier (April 3), a first frost 5 days later (November 5), a season 10 days longer.

The first measurable snow (0.1 inch or more) in El Reno usually arrives around December 22, and the last of the season around January 29. Those are the middle dates across the winters of 1991–2020 at El Reno 1 N, OK, 2.1 miles away: half of years saw snow earlier, half later. Snow fell in 63% of those winters. The last 32°F night of spring typically comes 67 days after the last snow.

ZIP 73036 is 2 miles from El Reno 1 N, OK, which stands at 1,325 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73036 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.