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USDA Hardiness Zone 7b

Frost Dates for 73433 — Elmore City, Oklahoma

NOAA 1991–2020 normals from Pauls Valley 4 WSW, OK (940 ft), 10 miles northeast.

Updated

In Elmore City, the last spring frost (32°F) is around April 5 in half of years and has passed by April 21 in nine years out of ten. The first fall frost comes around November 1, as early as October 18 one year in ten, leaving a typical freeze-free season of 210 days (NOAA, Pauls Valley 4 WSW, OK).

Last spring frost
April 5

50% probability

First fall frost
November 1

50% probability

Growing season
210 days

freeze-free, 50%

Hardiness zone
7b

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

First snow
Rare

median, 1991–2020

Last snow
Rare

median, 1991–2020

Winters with snow
38%

6 of 16 observed

Snow per year
0.8"

NOAA normal

Frost risk by date in Elmore City

Half of springs at Pauls Valley 4 WSW, OK see their last 32°F night by April 5; only one in ten is past it by March 19, and one in ten still has one after April 21. Planting tender crops after April 11 leaves a 30% risk of a frost on them, after April 15 20%, and after April 21 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 1 in half of years, as early as October 18 one year in ten, and holds off past November 16 one year in ten. A hard freeze of 28°F follows 8 days later, around November 9; in spring the one-in-ten date for 28°F is April 8, 13 days before the 32°F one. The freeze-free season lasts 210 days in a typical year, shorter than at 50% of the 114 Oklahoma stations; it reaches 233 days one year in ten and falls short of 189 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 10 days longer, to about April 15, and return around October 23. Severe cold of 16°F or below comes in 98% of winters, usually between December 18 and February 13.

Spring: the chance of another night this cold after the date
Low90%80%70%60%50%40%30%20%10%
36°FApr 1Apr 6Apr 9Apr 12Apr 15Apr 19Apr 22Apr 26May 1
32°FMar 19Mar 25Mar 30Apr 2Apr 5Apr 8Apr 11Apr 15Apr 21
28°FMar 4Mar 11Mar 16Mar 20Mar 24Mar 28Mar 31Apr 4Apr 8
24°FFeb 22Feb 27Mar 3Mar 6Mar 11Mar 14Mar 19Mar 24Mar 30
20°FFeb 3Feb 12Feb 19Feb 24Feb 28Mar 3Mar 7Mar 12Mar 17
16°F98% of yrsJan 17Jan 28Feb 1Feb 8Feb 13Feb 20Feb 26Mar 3Mar 11
Fall: the chance the first night this cold has come by the date
Low10%20%30%40%50%60%70%80%90%
36°FOct 8Oct 14Oct 18Oct 21Oct 23Oct 26Oct 29Nov 1Nov 6
32°FOct 18Oct 22Oct 26Oct 29Nov 1Nov 3Nov 6Nov 10Nov 16
28°FOct 25Oct 31Nov 2Nov 6Nov 9Nov 12Nov 16Nov 22Nov 29
24°FNov 1Nov 7Nov 12Nov 16Nov 20Nov 25Nov 30Dec 4Dec 9
20°FNov 10Nov 18Nov 23Nov 28Dec 2Dec 6Dec 10Dec 15Dec 20
16°F98% of yrsNov 24Dec 2Dec 7Dec 13Dec 18Dec 23Dec 28Jan 4Jan 16

Freeze probabilities 1991–2020 at Pauls Valley 4 WSW, 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 73433 →Compare Elmore City with another place →

Weather by month in Elmore City

July is the warmest month at Pauls Valley 4 WSW, OK, averaging 95°F by day and 71°F at night; January is the coldest at 52°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 64% of years.

Warmth for growing adds up to 5,333 growing degree days a year (base 50°F), more than at 78% of the 114 Oklahoma stations. 38% of them (2,019) have built up by the end of June, and July adds the most, 1,015. Precipitation totals 38.3 inches a year, most in May (5.3") and least in January (1.8"); May to September bring 52% of it.

Monthly normals 1991–2020 at Pauls Valley 4 WSW, OK
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan52271.8100%2421
Feb56312.2100%1748
Mar65392.898%8158
Apr74483.364%2337
May81585.32%0606
Jun89674.90%0849
Jul95712.70%01015
Aug95692.70%0998
Sep87624.30%0728
Oct76493.347%1404
Nov64392.697%11137
Dec54292.4100%2133

Monthly normals 1991–2020 at Pauls Valley 4 WSW, OK (940 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, Pauls Vly 1SSW Mesonet, OK, 11 miles northeast of Elmore City, has a last frost 8 days earlier (March 28), a first frost 6 days later (November 7), a season 13 days longer.

Frost dates for 73075 (Pauls Valley) →

When it snows in Elmore City, Oklahoma

Measurable snow is rare here: only 6 of 16 winters from 1991 to 2020 recorded 0.1 inch or more at Elmore City 3 SW, OK, 1.7 miles away, so there is no typical first-snow date to plan around.

Planting calendar for 73433

What to do and when, from the 50% frost dates for Elmore City, 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 9Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 18Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
November 1 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 73433 is 10 miles from Pauls Valley 4 WSW, OK, which stands at 940 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73433 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