USDA Hardiness Zone 6b

Frost Dates for 45840 — Findlay, Ohio

NOAA 1991–2020 normals from Findlay Wpcc, OH (768 ft), 1 miles northwest.

Updated October 28, 2026

In Findlay, the last spring frost (32°F) is around April 22 in half of years and has passed by May 6 in nine years out of ten. The first fall frost comes around October 24, as early as October 10 one year in ten, leaving a typical freeze-free season of 183 days (NOAA, Findlay Wpcc, OH).

Last spring frost: April 22
First fall frost: October 24
Growing season: 183 days
Hardiness zone: 6b

First snow: November 24
Last snow: April 1
Winters with snow: 100%
Snow per year: 23.8"

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Frost risk by date in Findlay

Half of springs at Findlay Wpcc, 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 6. Planting tender crops after April 29 leaves a 30% risk of a frost on them, after May 2 20%, and after May 6 10%. The 14 days between the even-odds date and the one-in-ten date is narrower than at 93% 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 10 one year in ten, and holds off past November 4 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 27, 9 days before the 32°F one. The freeze-free season lasts 183 days in a typical year, longer than at 59% of the 148 Ohio stations; it reaches 202 days one year in ten and falls short of 164 one year in ten. On average 117 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 9 days longer, to about May 1, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 7 and March 11.

Spring: the chance of another night this cold after the date
Low	90%	80%	70%	60%	50%	40%	30%	20%	10%
36°F	Apr 19	Apr 23	Apr 26	Apr 29	May 1	May 5	May 8	May 12	May 17
32°F	Apr 9	Apr 14	Apr 17	Apr 20	Apr 22	Apr 25	Apr 29	May 2	May 6
28°F	Mar 29	Apr 2	Apr 4	Apr 7	Apr 11	Apr 14	Apr 17	Apr 21	Apr 27
24°F	Mar 16	Mar 21	Mar 25	Mar 28	Mar 31	Apr 2	Apr 5	Apr 9	Apr 14
20°F	Mar 6	Mar 11	Mar 15	Mar 19	Mar 21	Mar 24	Mar 28	Mar 31	Apr 4
16°F	Feb 21	Mar 1	Mar 4	Mar 8	Mar 11	Mar 14	Mar 18	Mar 22	Mar 28

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	Sep 29	Oct 3	Oct 6	Oct 9	Oct 12	Oct 15	Oct 17	Oct 20	Oct 24
32°F	Oct 10	Oct 15	Oct 19	Oct 21	Oct 24	Oct 26	Oct 28	Nov 1	Nov 4
28°F	Oct 23	Oct 26	Oct 30	Nov 1	Nov 3	Nov 6	Nov 9	Nov 13	Nov 17
24°F	Nov 1	Nov 5	Nov 8	Nov 11	Nov 15	Nov 18	Nov 22	Nov 26	Dec 1
20°F	Nov 10	Nov 14	Nov 18	Nov 22	Nov 27	Nov 30	Dec 3	Dec 7	Dec 16
16°F	Nov 19	Nov 26	Nov 30	Dec 3	Dec 7	Dec 12	Dec 18	Dec 22	Dec 27

Freeze probabilities 1991–2020 at Findlay Wpcc, 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 45840 →Compare Findlay with another place →

Frost risk through the year in Findlay

Frost curve for Findlay, Ohio (Findlay Wpcc, OH, NOAA 1991–2020): the chance of another 32°F night falls from 90% on April 9 to 50% on April 22 and 10% on May 6; the chance that the first fall one has come rises from 10% on October 10 to 50% on October 24 and 90% on November 4. — In Findlay, the spring curve drops under 10% on May 6 and the fall curve passes 10% on October 10, 157 days later; that gap is longer than at 72% of the 148 Ohio stations with frost dates. The spring risk falls from 90% to 10% over 27 days (April 9 to May 6) and the fall risk climbs from 10% to 90% over 25 days (October 10 to November 4): both ends of the season vary about as much. At Findlay Airport, OH, 2 miles southwest, the same gap runs from May 6 to October 9, 1 day shorter.

Chance of a frost after each planting date in Findlay
Planted on	Another 32°F night	28°F night
Apr 8	over 90%	58%
Apr 15	77%	37%
Apr 2250% date	50%	18%
Apr 29	30%	under 10%
May 6	under 10%	under 10%
May 13	under 10%	under 10%

Weather by month in Findlay

July is the warmest month at Findlay Wpcc, OH, averaging 84°F by day and 64°F at night; January is the coldest at 34°F and 19°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 23% of years.

Warmth for growing adds up to 3,261 growing degree days a year (base 50°F), more than at 54% of the 148 Ohio stations. 35% of them (1,137) have built up by the end of June, and July adds the most, 746. Precipitation totals 37.8 inches a year, most in June (4.2") and least in February (2.2"); May to September bring 50% of it.

Monthly normals 1991–2020 at Findlay Wpcc, OH
Month	High °F	Low °F	Precip. in	32°F night	Nights ≤ 32°F	GDD 50°F
Jan	34	19	2.6	100%	27	2
Feb	37	21	2.2	100%	24	4
Mar	47	29	2.6	100%	20	28
Apr	61	40	3.8	98%	6	119
May	72	51	4.1	23%	<1	364
Jun	81	61	4.2	0%	0	621
Jul	84	64	3.9	0%	0	746
Aug	82	62	3.7	0%	0	690
Sep	76	55	2.9	1%	0	471
Oct	64	44	2.7	80%	2	179
Nov	50	33	2.6	100%	14	34
Dec	38	25	2.5	100%	24	5

Monthly normals 1991–2020 at Findlay Wpcc, OH (768 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, Findlay Airport, OH, 2 miles southwest of Findlay, has a last frost 3 days earlier (April 19), a first frost 1 day earlier (October 23), a season 2 days longer.

Frost dates for 45814 (Arlington) →

When it snows in Findlay, Ohio

The first measurable snow (0.1 inch or more) in Findlay usually arrives around November 24, and the last of the season around April 1. Those are the middle dates across the winters of 1991–2020 at Findlay Wpcc, OH, 1 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 21 days after the last snow.

Planting calendar for 45840

What to do and when, from the 50% frost dates for Findlay, Ohio
When	What to do
February 11 – February 25	Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out.
February 25 – March 11	Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early.
March 25 – April 8	Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil.
April 22 onward	Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast.
by August 1	Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops.
by October 10	Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation.
October 24 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 45840 is 1 mile from Findlay Wpcc, OH, which stands at 768 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 45840 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.