Frost Dates for 73010 — Blanchard, Oklahoma

Half of springs at Blanchard 2 SSW, OK see their last 32°F night by April 3; only one in ten is past it by March 15, and one in ten still has one after April 19. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 14 20%, and after April 19 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 November 4 in half of years, as early as October 21 one year in ten, and holds off past November 18 one year in ten. A hard freeze of 28°F follows 9 days later, around November 13; in spring the one-in-ten date for 28°F is April 9, 10 days before the 32°F one. The freeze-free season lasts 214 days in a typical year, longer than at 61% of the 114 Oklahoma stations; it reaches 238 days one year in ten and falls short of 193 one year in ten. On average 72 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 14, and return around October 26. Severe cold of 16°F or below comes in 98% of winters, usually between December 20 and February 13.

July is the warmest month at Blanchard 2 SSW, OK, averaging 95°F by day and 70°F at night; January is the coldest at 53°F and 27°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 57% of years.

Warmth for growing adds up to 5,292 growing degree days a year (base 50°F), more than at 73% of the 114 Oklahoma stations. 38% of them (2,003) have built up by the end of June, and July adds the most, 1,015. Precipitation totals 36.5 inches a year, most in May (5.3") and least in January (1.5"); May to September bring 54% of it.

The nearest other station, Norman 3SSE, OK, 13 miles east of Blanchard, has the same 50% last-frost date, a first frost 1 day earlier (November 3), a season 2 days shorter.

The first measurable snow (0.1 inch or more) in Blanchard usually arrives around December 9, and the last of the season around February 6. Those are the middle dates across the winters of 1991–2020 at Blanchard 2 SSW, OK, 0.3 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 56 days after the last snow.

ZIP 73010 is under a mile from Blanchard 2 SSW, OK, which stands at 1,275 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73010 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.