Frost Dates for 73044 — Guthrie, Oklahoma

Half of springs at Guthrie Municipal Airport, OK see their last 32°F night by April 3; only one in ten is past it by March 17, and one in ten still has one after April 20. Planting tender crops after April 9 leaves a 30% risk of a frost on them, after April 13 20%, and after April 20 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 41% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 1 in half of years, as early as October 19 one year in ten, and holds off past November 16 one year in ten. A hard freeze of 28°F follows 10 days later, around November 11; in spring the one-in-ten date for 28°F is April 8, 12 days before the 32°F one. The freeze-free season lasts 211 days in a typical year, longer than at 51% of the 114 Oklahoma stations; it reaches 236 days one year in ten and falls short of 189 one year in ten. On average 75 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 25. Severe cold of 16°F or below comes every winter, usually between December 17 and February 17.

July is the warmest month at Guthrie Municipal Airport, OK, averaging 94°F by day and 72°F at night; January is the coldest at 49°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 58% of years.

Warmth for growing adds up to 5,247 growing degree days a year (base 50°F), more than at 67% of the 114 Oklahoma stations. 38% of them (1,986) have built up by the end of June, and July adds the most, 1,027. Precipitation totals 30.6 inches a year, most in June (4.4") and least in January (1.2"); May to September bring 54% of it.

The nearest other station, Guthrie 4WSW Mesonet, OK, 3 miles west of Guthrie, has the same 50% last-frost date, a first frost 3 days later (November 4), a season 3 days longer.

The first measurable snow (0.1 inch or more) in Guthrie usually arrives around December 13, and the last of the season around February 16. Those are the middle dates across the winters of 1991–2020 at Guthrie 5S, OK, 3.5 miles away: half of years saw snow earlier, half later. Snow fell in 96% of those winters. The last 32°F night of spring typically comes 46 days after the last snow.

ZIP 73044 is 1 mile from Guthrie Municipal Airport, OK, which stands at 1,068 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73044 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.