Skip to content

USDA Hardiness Zone 7b

Frost Dates for 73662 — Sayre, Oklahoma

NOAA 1991–2020 normals from Elk City 4 W, OK (2,120 ft), 10 miles northeast.

Updated

In Sayre, the last spring frost (32°F) is around April 5 in half of years and has passed by April 24 in nine years out of ten. The first fall frost comes around November 2, as early as October 19 one year in ten, leaving a typical freeze-free season of 208 days (NOAA, Elk City 4 W, OK).

Last spring frost
April 5

50% probability

First fall frost
November 2

50% probability

Growing season
208 days

freeze-free, 50%

Hardiness zone
7b

5 to 10°F (-15.0 to -12.2°C) coldest night

First snow
December 18

median, 1991–2020

Last snow
February 16

median, 1991–2020

Winters with snow
96%

27 of 28 observed

Snow per year
6.5"

NOAA normal

Frost risk by date in Sayre

Half of springs at Elk City 4 W, OK see their last 32°F night by April 5; only one in ten is past it by March 17, and one in ten still has one after April 24. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 18 20%, and after April 24 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 81% of the 114 Oklahoma stations behind this site's ZIP pages.

In fall the first 32°F night comes by November 2 in half of years, as early as October 19 one year in ten, and holds off past November 17 one year in ten. A hard freeze of 28°F follows 9 days later, around November 11; in spring the one-in-ten date for 28°F is April 13, 11 days before the 32°F one. The freeze-free season lasts 208 days in a typical year, shorter than at 62% of the 114 Oklahoma stations; it reaches 232 days one year in ten and falls short of 186 one year in ten. On average 84 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 16, and return around October 25. Severe cold of 16°F or below comes in 99% of winters, usually between December 19 and February 17.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FMar 31Apr 5Apr 9Apr 12Apr 16Apr 19Apr 23Apr 26May 2
32°FMar 17Mar 25Mar 30Apr 2Apr 5Apr 8Apr 13Apr 18Apr 24
28°FMar 5Mar 11Mar 16Mar 21Mar 25Mar 30Apr 2Apr 5Apr 13
24°FFeb 22Feb 28Mar 4Mar 7Mar 11Mar 16Mar 22Mar 26Apr 1
20°FFeb 7Feb 16Feb 21Feb 26Mar 1Mar 4Mar 8Mar 14Mar 21
16°F99% of yrsJan 17Jan 29Feb 6Feb 11Feb 17Feb 22Feb 28Mar 3Mar 10
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 11Oct 16Oct 20Oct 22Oct 25Oct 27Oct 31Nov 2Nov 6
32°FOct 19Oct 23Oct 27Oct 30Nov 2Nov 5Nov 7Nov 11Nov 17
28°FOct 25Nov 1Nov 5Nov 8Nov 11Nov 14Nov 18Nov 21Nov 28
24°FNov 5Nov 10Nov 14Nov 18Nov 21Nov 25Nov 29Dec 3Dec 9
20°FNov 14Nov 19Nov 24Nov 29Dec 2Dec 6Dec 12Dec 18Dec 26
16°F99% of yrsNov 23Dec 1Dec 7Dec 13Dec 19Dec 25Dec 31Jan 5Jan 14

Freeze probabilities 1991–2020 at Elk City 4 W, OK, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.

Frost risk on any date in 73662 →Compare Sayre with another place →

Weather by month in Sayre

July is the warmest month at Elk City 4 W, OK, averaging 95°F by day and 70°F at night; January is the coldest at 50°F and 26°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 63% of years.

Warmth for growing adds up to 4,994 growing degree days a year (base 50°F), fewer than at 72% of the 114 Oklahoma stations. 37% of them (1,864) have built up by the end of June, and July adds the most, 997. Precipitation totals 29.6 inches a year, most in May (4.5") and least in January (0.9"); May to September bring 58% of it.

Monthly normals 1991–2020 at Elk City 4 W, OK
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan50260.9100%2412
Feb55291.0100%1732
Mar64372.199%9138
Apr72462.763%2293
May81564.54%0572
Jun89653.80%0817
Jul95702.50%0997
Aug94683.70%0959
Sep85612.80%0692
Oct74482.944%1363
Nov61371.499%9104
Dec51291.3100%2116

Monthly normals 1991–2020 at Elk City 4 W, OK (2,120 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.

Compared with the next station

The nearest other station, Mangum, OK, 31 miles south of Sayre and 525 feet lower, has a last frost 3 days later (April 8), the same first-frost date, a season 1 day shorter.

Frost dates for 73554 (Mangum) →

When it snows in Sayre, Oklahoma

The first measurable snow (0.1 inch or more) in Sayre usually arrives around December 18, and the last of the season around February 16. Those are the middle dates across the winters of 1991–2020 at Sayre, OK, 1.8 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 48 days after the last snow.

Planting calendar for 73662

What to do and when, from the 50% frost dates for Sayre, Oklahoma
WhenWhat to do
January 25 – February 8Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 8 – February 22Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 8 – March 22Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 5 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 10Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 19Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 2 onwardPlant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter.

The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.

Where these figures come from

ZIP 73662 is 10 miles from Elk City 4 W, OK, which stands at 2,120 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 73644 (Elk City). The 2023 USDA Plant Hardiness Zone Map lists ZIP 73662 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.

Frost dates across Oklahoma →

Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.

Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.

ZIP codes measured at the same station

Other zone 7b places in Oklahoma