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USDA Hardiness Zone 6a

Frost Dates for 43326 — Kenton, Ohio

NOAA 1991–2020 normals from Kenton, OH (997 ft), under a mile north.

Updated

In Kenton, the last spring frost (32°F) is around April 22 in half of years and has passed by May 7 in nine years out of ten. The first fall frost comes around October 24, as early as October 9 one year in ten, leaving a typical freeze-free season of 182 days (NOAA, Kenton, OH).

Last spring frost
April 22

50% probability

First fall frost
October 24

50% probability

Growing season
182 days

freeze-free, 50%

Hardiness zone
6a

-10 to -5°F (-23.3 to -20.6°C) coldest night

First snow
December 4

median, 1991–2020

Last snow
March 19

median, 1991–2020

Winters with snow
94%

17 of 18 observed

Snow per year
25.8"

NOAA normal

Frost risk by date in Kenton

Half of springs at Kenton, OH see their last 32°F night by April 22; only one in ten is past it by April 9, and one in ten still has one after May 7. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 2 20%, and after May 7 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 77% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 24 in half of years, as early as October 9 one year in ten, and holds off past November 6 one year in ten. A hard freeze of 28°F follows 10 days later, around November 3; in spring the one-in-ten date for 28°F is April 26, 11 days before the 32°F one. The freeze-free season lasts 182 days in a typical year, longer than at 55% of the 148 Ohio stations; it reaches 201 days one year in ten and falls short of 161 one year in ten. On average 124 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 May 3, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 6 and March 12.

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

Freeze probabilities 1991–2020 at Kenton, OH, 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 43326 →Compare Kenton with another place →

Weather by month in Kenton

July is the warmest month at Kenton, OH, averaging 84°F by day and 64°F at night; January is the coldest at 33°F and 18°F. A freezing night is all but certain in every month from November to April (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 26% of years.

Warmth for growing adds up to 3,219 growing degree days a year (base 50°F), fewer than at 51% of the 148 Ohio stations. 35% of them (1,116) have built up by the end of June, and July adds the most, 744. Precipitation totals 37.7 inches a year, most in June (3.9") and least in January (2.6"); May to September bring 47% of it.

Monthly normals 1991–2020 at Kenton, OH
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan33182.6100%271
Feb36212.6100%253
Mar47292.8100%2128
Apr60393.798%6120
May72503.726%<1349
Jun81603.90%0615
Jul84643.40%0744
Aug83623.60%0690
Sep77543.12%<1465
Oct64432.675%4169
Nov50332.9100%1532
Dec38242.8100%264

Monthly normals 1991–2020 at Kenton, OH (997 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, Huntsville 3N, OH, 16 miles southwest of Kenton, has the same 50% last-frost date, a first frost 3 days later (October 27), a season 6 days longer.

Frost dates for 43331 (Lakeview) →

When it snows in Kenton, Ohio

The first measurable snow (0.1 inch or more) in Kenton usually arrives around December 4, and the last of the season around March 19. Those are the middle dates across the winters of 1991–2020 at Kenton, OH, 0.4 miles away: half of years saw snow earlier, half later. Snow fell in 94% of those winters. The last 32°F night of spring typically comes 34 days after the last snow.

Planting calendar for 43326

What to do and when, from the 50% frost dates for Kenton, Ohio
WhenWhat to do
February 11 – February 25Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 25 – March 11Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 25 – April 8Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 22 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 1Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 10Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
October 24 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 43326 is under a mile from Kenton, OH, which stands at 997 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 43326 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°C) over 1991–2020; a zone describes winter lows, not frost dates.

Frost dates across Ohio →

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 6a places in Ohio