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USDA Hardiness Zone 6b

Frost Dates for 41164 — Olive Hill, Kentucky

NOAA 1991–2020 normals from Olive Hill 5NE, KY (888 ft), 6 miles northeast.

Updated

In Olive Hill, the last spring frost (32°F) is around April 24 in half of years and has passed by May 12 in nine years out of ten. The first fall frost comes around October 18, as early as October 6 one year in ten, leaving a typical freeze-free season of 174 days (NOAA, Olive Hill 5NE, KY).

Last spring frost
April 24

50% probability

First fall frost
October 18

50% probability

Growing season
174 days

freeze-free, 50%

Hardiness zone
6b

-5 to 0°F (-20.6 to -17.8°C) coldest night

First snow
December 4

median, 1991–2020

Last snow
March 4

median, 1991–2020

Winters with snow
100%

16 of 16 observed

Snow per year
17.5"

NOAA normal

Frost risk by date in Olive Hill

Half of springs at Olive Hill 5NE, KY see their last 32°F night by April 24; only one in ten is past it by April 13, and one in ten still has one after May 12. Planting tender crops after May 2 leaves a 30% risk of a frost on them, after May 6 20%, and after May 12 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 54% of the 113 Kentucky stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 18 in half of years, as early as October 6 one year in ten, and holds off past October 30 one year in ten. A hard freeze of 28°F follows 9 days later, around October 27; in spring the one-in-ten date for 28°F is May 1, 11 days before the 32°F one. The freeze-free season lasts 174 days in a typical year, shorter than at 92% of the 113 Kentucky stations; it reaches 192 days one year in ten and falls short of 154 one year in ten. On average 133 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 5, and return around October 9. Severe cold of 16°F or below comes every winter, usually between November 30 and March 7.

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

Freeze probabilities 1991–2020 at Olive Hill 5NE, KY, 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 41164 →Compare Olive Hill with another place →

Weather by month in Olive Hill

July is the warmest month at Olive Hill 5NE, KY, averaging 82°F by day and 63°F at night; January is the coldest at 40°F and 21°F. A freezing night is all but certain in every month from October 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 34% of years.

Warmth for growing adds up to 3,154 growing degree days a year (base 50°F), fewer than at 99% of the 113 Kentucky stations. 37% of them (1,165) have built up by the end of June, and July adds the most, 696. Precipitation totals 50.0 inches a year, most in July (6.1") and least in November (3.0"); May to September bring 48% of it.

Monthly normals 1991–2020 at Olive Hill 5NE, KY
MonthHigh °FLow °FPrecip. in32°F nightNights ≤ 32°FGDD 50°F
Jan40213.4100%275
Feb45233.3100%2411
Mar54294.9100%2145
Apr66384.499%10156
May74504.934%1378
Jun79595.10%0570
Jul82636.10%0696
Aug82604.10%0651
Sep76543.71%0443
Oct66413.192%6162
Nov54303.0100%2131
Dec44264.0100%248

Monthly normals 1991–2020 at Olive Hill 5NE, KY (888 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, Gimlet 9N, KY, 6 miles southeast of Olive Hill and 232 feet higher, has a last frost 14 days earlier (April 10), a first frost 13 days later (October 31), a season 27 days longer.

Frost dates for 41171 (Sandy Hook) →

When it snows in Olive Hill, Kentucky

The first measurable snow (0.1 inch or more) in Olive Hill usually arrives around December 4, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Olive Hill 5NE, KY, 5.5 miles away: half of years saw snow earlier, half later. Every one of those winters saw snow. The last 32°F night of spring typically comes 51 days after the last snow.

Planting calendar for 41164

What to do and when, from the 50% frost dates for Olive Hill, Kentucky
WhenWhat to do
February 13 – February 27Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 27 – March 13Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 27 – April 10Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 24 onwardTransplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by July 26Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 4Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
October 18 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 41164 is 6 miles from Olive Hill 5NE, KY, which stands at 888 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 41164 in zone 6b, the band where the coldest night of the year averaged -5 to 0°F (-20.6 to -17.8°C) over 1991–2020; a zone describes winter lows, not frost dates.

Frost dates across Kentucky →

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.

Other zone 6b places in Kentucky