USDA Hardiness Zone 6b
Frost Dates for 43551 — Perrysburg, Ohio
NOAA 1991–2020 normals from Toledo Metcalf Field, OH (622 ft), 6 miles east.
Updated
In Perrysburg, the last spring frost (32°F) is around April 20 in half of years and has passed by May 7 in nine years out of ten. The first fall frost comes around October 27, as early as October 14 one year in ten, leaving a typical freeze-free season of 188 days (NOAA, Toledo Metcalf Field, OH).
- Last spring frost
- April 20
- First fall frost
- October 27
- Growing season
- 188 days
- Hardiness zone
- 6b
50% probability
50% probability
freeze-free, 50%
-5 to 0°F (-20.6 to -17.8°C) coldest night
- First snow
- December 6
- Last snow
- March 11
- Winters with snow
- 100%
- Snow per year
- 21.3"
median, 1991–2020
median, 1991–2020
25 of 25 observed
NOAA normal
Frost risk by date in Perrysburg
Half of springs at Toledo Metcalf Field, OH see their last 32°F night by April 20; only one in ten is past it by April 5, and one in ten still has one after May 7. Planting tender crops after April 27 leaves a 30% risk of a frost on them, after May 1 20%, and after May 7 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 24% of the 148 Ohio stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 27 in half of years, as early as October 14 one year in ten, and holds off past November 9 one year in ten. A hard freeze of 28°F follows 11 days later, around November 7; in spring the one-in-ten date for 28°F is April 25, 12 days before the 32°F one. The freeze-free season lasts 188 days in a typical year, longer than at 76% of the 148 Ohio stations; it reaches 209 days one year in ten and falls short of 167 one year in ten. On average 118 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 1, and return around October 15. Severe cold of 16°F or below comes every winter, usually between December 8 and March 10.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 17 | Apr 22 | Apr 25 | Apr 29 | May 1 | May 4 | May 7 | May 11 | May 16 |
| 32°F | Apr 5 | Apr 10 | Apr 14 | Apr 17 | Apr 20 | Apr 23 | Apr 27 | May 1 | May 7 |
| 28°F | Mar 25 | Mar 31 | Apr 2 | Apr 4 | Apr 8 | Apr 12 | Apr 16 | Apr 20 | Apr 25 |
| 24°F | Mar 14 | Mar 19 | Mar 23 | Mar 26 | Mar 29 | Mar 31 | Apr 3 | Apr 6 | Apr 13 |
| 20°F | Mar 3 | Mar 9 | Mar 14 | Mar 16 | Mar 19 | Mar 22 | Mar 26 | Mar 29 | Apr 1 |
| 16°F | Feb 19 | Feb 27 | Mar 3 | Mar 7 | Mar 10 | Mar 14 | Mar 17 | Mar 21 | Mar 27 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 1 | Oct 5 | Oct 9 | Oct 12 | Oct 15 | Oct 18 | Oct 21 | Oct 24 | Oct 28 |
| 32°F | Oct 14 | Oct 19 | Oct 22 | Oct 25 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 9 |
| 28°F | Oct 26 | Nov 1 | Nov 2 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 16 | Nov 21 |
| 24°F | Nov 4 | Nov 7 | Nov 11 | Nov 14 | Nov 17 | Nov 20 | Nov 24 | Nov 29 | Dec 5 |
| 20°F | Nov 11 | Nov 16 | Nov 20 | Nov 24 | Nov 27 | Dec 1 | Dec 5 | Dec 10 | Dec 17 |
| 16°F | Nov 19 | Nov 25 | Nov 30 | Dec 4 | Dec 8 | Dec 12 | Dec 17 | Dec 22 | Dec 27 |
Freeze probabilities 1991–2020 at Toledo Metcalf Field, 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 43551 →Compare Perrysburg with another place →
Frost risk through the year in Perrysburg
In Perrysburg, the spring curve drops under 10% on May 7 and the fall curve passes 10% on October 14, 160 days later; that gap is longer than at 79% of the 148 Ohio stations with frost dates. The spring risk falls from 90% to 10% over 32 days (April 5 to May 7) and the fall risk climbs from 10% to 90% over 26 days (October 14 to November 9): both ends of the season vary about as much. At Bowling Green Wwtp, OH, 11 miles south, the same gap runs from May 7 to October 12, 2 days shorter.
| Planted on | Another 32°F night | 28°F night |
|---|---|---|
| Apr 6 | 88% | 55% |
| Apr 13 | 73% | 38% |
| Apr 2050% date | 50% | 20% |
| Apr 27 | 30% | under 10% |
| May 4 | 15% | under 10% |
| May 11 | under 10% | under 10% |
Weather by month in Perrysburg
July is the warmest month at Toledo Metcalf Field, OH, averaging 85°F by day and 65°F at night; January is the coldest at 34°F and 20°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 21% of years.
Warmth for growing adds up to 3,283 growing degree days a year (base 50°F), more than at 59% of the 148 Ohio stations. 34% of them (1,119) have built up by the end of June, and July adds the most, 766. Precipitation totals 32.5 inches a year, most in May (3.5") and least in January (1.8"); May to September bring 51% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 34 | 20 | 1.8 | 100% | 27 | 2 |
| Feb | 36 | 22 | 1.8 | 100% | 25 | 3 |
| Mar | 47 | 29 | 2.3 | 100% | 21 | 25 |
| Apr | 60 | 40 | 3.3 | 96% | 6 | 105 |
| May | 71 | 51 | 3.5 | 21% | <1 | 356 |
| Jun | 81 | 61 | 3.2 | 0% | 0 | 628 |
| Jul | 85 | 65 | 3.2 | 0% | 0 | 766 |
| Aug | 82 | 63 | 3.5 | 0% | 0 | 708 |
| Sep | 76 | 55 | 3.1 | 0% | 0 | 469 |
| Oct | 64 | 45 | 2.4 | 65% | 2 | 180 |
| Nov | 50 | 34 | 2.3 | 100% | 14 | 35 |
| Dec | 38 | 26 | 2.1 | 100% | 24 | 6 |
Monthly normals 1991–2020 at Toledo Metcalf Field, OH (622 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, Bowling Green Wwtp, OH, 11 miles south of Perrysburg, has a last frost 2 days later (April 22), a first frost 2 days earlier (October 25), a season 2 days shorter.
When it snows in Perrysburg, Ohio
The first measurable snow (0.1 inch or more) in Perrysburg usually arrives around December 6, and the last of the season around March 11. Those are the middle dates across the winters of 1991–2020 at Bowling Green Wwtp, OH, 11 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 40 days after the last snow.
Planting calendar for 43551
| When | What to do |
|---|---|
| February 9 – February 23 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 23 – March 9 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 23 – April 6 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 20 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 4 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 13 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 27 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 43551 is 6 miles from Toledo Metcalf Field, OH, which stands at 622 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 21 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 43551 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.
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.