USDA Hardiness Zone 6b

Frost Dates for 45631 — Gallipolis, Ohio

NOAA 1991–2020 normals from Gallipolis, OH (578 ft), 3 miles east.

Updated October 28, 2026

In Gallipolis, the last spring frost (32°F) is around April 18 in half of years and has passed by May 4 in nine years out of ten. The first fall frost comes around October 28, as early as October 15 one year in ten, leaving a typical freeze-free season of 192 days (NOAA, Gallipolis, OH).

Last spring frost: April 18
First fall frost: October 28
Growing season: 192 days
Hardiness zone: 6b

First snow: January 6
Last snow: February 17
Winters with snow: 76%
Snow per year: —

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Frost risk by date in Gallipolis

Half of springs at Gallipolis, OH see their last 32°F night by April 18; only one in ten is past it by April 3, and one in ten still has one after May 4. Planting tender crops after April 23 leaves a 30% risk of a frost on them, after April 28 20%, and after May 4 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 53% of the 148 Ohio stations behind this site's ZIP pages.

In fall the first 32°F night comes by October 28 in half of years, as early as October 15 one year in ten, and holds off past November 8 one year in ten. A hard freeze of 28°F follows 8 days later, around November 5; in spring the one-in-ten date for 28°F is April 18, 16 days before the 32°F one. The freeze-free season lasts 192 days in a typical year, longer than at 86% of the 148 Ohio stations; it reaches 212 days one year in ten and falls short of 172 one year in ten. On average 103 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 29, and return around October 18. Severe cold of 16°F or below comes every winter, usually between December 15 and February 28.

Spring: the chance of another night this cold after the date
Low	90%	80%	70%	60%	50%	40%	30%	20%	10%
36°F	Apr 15	Apr 19	Apr 22	Apr 26	Apr 29	May 1	May 5	May 10	May 15
32°F	Apr 3	Apr 7	Apr 12	Apr 15	Apr 18	Apr 20	Apr 23	Apr 28	May 4
28°F	Mar 21	Mar 28	Mar 31	Apr 2	Apr 4	Apr 7	Apr 11	Apr 15	Apr 18
24°F	Mar 7	Mar 13	Mar 18	Mar 22	Mar 25	Mar 29	Mar 31	Apr 3	Apr 9
20°F	Feb 20	Feb 28	Mar 4	Mar 9	Mar 13	Mar 17	Mar 20	Mar 24	Mar 29
16°F	Feb 5	Feb 13	Feb 20	Feb 25	Feb 28	Mar 5	Mar 9	Mar 15	Mar 20

Fall: the chance the first night this cold has come by the date
Low	10%	20%	30%	40%	50%	60%	70%	80%	90%
36°F	Oct 5	Oct 9	Oct 13	Oct 16	Oct 18	Oct 20	Oct 23	Oct 25	Oct 29
32°F	Oct 15	Oct 20	Oct 23	Oct 26	Oct 28	Oct 30	Nov 1	Nov 3	Nov 8
28°F	Oct 26	Oct 31	Nov 1	Nov 3	Nov 5	Nov 9	Nov 11	Nov 15	Nov 21
24°F	Nov 3	Nov 6	Nov 10	Nov 13	Nov 16	Nov 19	Nov 23	Nov 28	Dec 3
20°F	Nov 12	Nov 17	Nov 22	Nov 26	Dec 1	Dec 3	Dec 7	Dec 13	Dec 21
16°F	Nov 23	Dec 1	Dec 6	Dec 10	Dec 15	Dec 21	Dec 26	Jan 1	Jan 7

Freeze probabilities 1991–2020 at Gallipolis, 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 45631 →Compare Gallipolis with another place →

Frost risk through the year in Gallipolis

Frost curve for Gallipolis, Ohio (Gallipolis, OH, NOAA 1991–2020): the chance of another 32°F night falls from 90% on April 3 to 50% on April 18 and 10% on May 4; the chance that the first fall one has come rises from 10% on October 15 to 50% on October 28 and 90% on November 8. — In Gallipolis, the spring curve drops under 10% on May 4 and the fall curve passes 10% on October 15, 164 days later; that gap is longer than at 89% of the 148 Ohio stations with frost dates. The spring risk falls from 90% to 10% over 31 days (April 3 to May 4) and the fall risk climbs from 10% to 90% over 24 days (October 15 to November 8): the last frost moves more from year to year than the first. At Hogsett Rc Byrd Dam, WV, 10 miles south, the same gap runs from May 5 to October 16, the same length.

Chance of a frost after each planting date in Gallipolis
Planted on	Another 32°F night	28°F night
Apr 4	88%	50%
Apr 11	72%	30%
Apr 1850% date	50%	under 10%
Apr 25	26%	under 10%
May 2	13%	under 10%
May 9	under 10%	under 10%

Weather by month in Gallipolis

July is the warmest month at Gallipolis, OH, averaging 86°F by day and 66°F at night; January is the coldest at 41°F and 23°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 15% of years.

Warmth for growing adds up to 3,803 growing degree days a year (base 50°F), more than at 97% of the 148 Ohio stations. 36% of them (1,366) have built up by the end of June, and July adds the most, 804. Precipitation totals 44.7 inches a year, most in June (4.6") and least in November (2.6"); May to September bring 47% of it.

Monthly normals 1991–2020 at Gallipolis, OH
Month	High °F	Low °F	Precip. in	32°F night	Nights ≤ 32°F	GDD 50°F
Jan	41	23	3.1	100%	24	7
Feb	46	25	3.1	100%	21	10
Mar	55	32	4.1	100%	16	57
Apr	67	42	3.9	93%	5	196
May	75	52	4.5	15%	<1	431
Jun	83	61	4.6	0%	0	664
Jul	86	66	4.5	0%	0	804
Aug	86	64	3.6	0%	0	770
Sep	80	57	3.8	0%	0	552
Oct	68	45	3.1	67%	2	239
Nov	56	34	2.6	100%	14	58
Dec	45	28	3.8	100%	21	14

Monthly normals 1991–2020 at Gallipolis, OH (578 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, Hogsett Rc Byrd Dam, WV, 10 miles south of Gallipolis, has the same 50% last-frost date, a first frost 1 day later (October 29).

Frost dates for 45623 (Crown City) →

When it snows in Gallipolis, Ohio

The first measurable snow (0.1 inch or more) in Gallipolis usually arrives around January 6, and the last of the season around February 17. Those are the middle dates across the winters of 1991–2020 at Gallipolis, OH, 2.5 miles away: half of years saw snow earlier, half later. Snow fell in 76% of those winters. The last 32°F night of spring typically comes 60 days after the last snow.

Planting calendar for 45631

What to do and when, from the 50% frost dates for Gallipolis, Ohio
When	What to do
February 7 – February 21	Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 21 – March 7	Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 21 – April 4	Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 18 onward	Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 5	Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 14	Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
October 28 onward	Plant 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 45631 is 3 miles from Gallipolis, OH, which stands at 578 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 3 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 45631 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 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.