USDA Hardiness Zone 7a
Frost Dates for 45659 — Pedro, Ohio
NOAA 1991–2020 normals from Waterloo, OH (625 ft), 8 miles east.
Updated
In Pedro, the last spring frost (32°F) is around April 30 in half of years and has passed by May 16 in nine years out of ten. The first fall frost comes around October 15, as early as October 3 one year in ten, leaving a typical freeze-free season of 167 days (NOAA, Waterloo, OH).
- Last spring frost
- April 30
- First fall frost
- October 15
- Growing season
- 167 days
- Hardiness zone
- 7a
50% probability
50% probability
freeze-free, 50%
0 to 5°F (-17.8 to -15.0°C) coldest night
- First snow
- December 15
- Last snow
- March 6
- Winters with snow
- 100%
- Snow per year
- 13.6"
median, 1991–2020
median, 1991–2020
22 of 22 observed
NOAA normal
Frost risk by date in Pedro
Half of springs at Waterloo, OH see their last 32°F night by April 30; only one in ten is past it by April 15, and one in ten still has one after May 16. Planting tender crops after May 7 leaves a 30% risk of a frost on them, after May 11 20%, and after May 16 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 15 in half of years, as early as October 3 one year in ten, and holds off past October 27 one year in ten. A hard freeze of 28°F follows 10 days later, around October 25; in spring the one-in-ten date for 28°F is May 6, 10 days before the 32°F one. The freeze-free season lasts 167 days in a typical year, shorter than at 87% of the 148 Ohio stations; it reaches 186 days one year in ten and falls short of 148 one year in ten. On average 131 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 8 days longer, to about May 8, and return around October 5. Severe cold of 16°F or below comes every winter, usually between November 28 and March 10.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 25 | Apr 30 | May 2 | May 5 | May 8 | May 12 | May 15 | May 18 | May 24 |
| 32°F | Apr 15 | Apr 19 | Apr 23 | Apr 26 | Apr 30 | May 3 | May 7 | May 11 | May 16 |
| 28°F | Apr 3 | Apr 7 | Apr 11 | Apr 14 | Apr 18 | Apr 21 | Apr 24 | Apr 29 | May 6 |
| 24°F | Mar 21 | Mar 26 | Mar 30 | Apr 1 | Apr 4 | Apr 6 | Apr 10 | Apr 14 | Apr 20 |
| 20°F | Mar 4 | Mar 13 | Mar 17 | Mar 20 | Mar 23 | Mar 26 | Mar 29 | Apr 1 | Apr 5 |
| 16°F | Feb 15 | Feb 25 | Feb 28 | Mar 4 | Mar 10 | Mar 14 | Mar 18 | Mar 22 | Mar 27 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 23 | Sep 28 | Oct 1 | Oct 3 | Oct 5 | Oct 8 | Oct 10 | Oct 13 | Oct 18 |
| 32°F | Oct 3 | Oct 6 | Oct 9 | Oct 12 | Oct 15 | Oct 18 | Oct 21 | Oct 24 | Oct 27 |
| 28°F | Oct 11 | Oct 16 | Oct 19 | Oct 22 | Oct 25 | Oct 28 | Oct 31 | Nov 2 | Nov 6 |
| 24°F | Oct 22 | Oct 28 | Oct 31 | Nov 2 | Nov 4 | Nov 7 | Nov 10 | Nov 14 | Nov 19 |
| 20°F | Nov 1 | Nov 5 | Nov 9 | Nov 12 | Nov 15 | Nov 18 | Nov 22 | Nov 26 | Dec 2 |
| 16°F | Nov 11 | Nov 16 | Nov 20 | Nov 24 | Nov 28 | Dec 1 | Dec 6 | Dec 12 | Dec 22 |
Freeze probabilities 1991–2020 at Waterloo, 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 45659 →Compare Pedro with another place →
Weather by month in Pedro
July is the warmest month at Waterloo, OH, averaging 86°F by day and 62°F at night; January is the coldest at 41°F and 20°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 45% of years.
Warmth for growing adds up to 3,315 growing degree days a year (base 50°F), more than at 61% of the 148 Ohio stations. 36% of them (1,186) have built up by the end of June, and July adds the most, 744. Precipitation totals 45.9 inches a year, most in July (5.6") and least in November (2.9"); May to September bring 47% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 41 | 20 | 3.3 | 100% | 26 | 7 |
| Feb | 45 | 22 | 3.2 | 100% | 24 | 8 |
| Mar | 54 | 29 | 4.2 | 100% | 20 | 41 |
| Apr | 67 | 38 | 3.7 | 100% | 9 | 154 |
| May | 75 | 49 | 4.5 | 45% | 1 | 376 |
| Jun | 83 | 58 | 4.1 | 0% | 0 | 602 |
| Jul | 86 | 62 | 5.6 | 0% | 0 | 744 |
| Aug | 85 | 60 | 3.7 | 0% | 0 | 697 |
| Sep | 79 | 52 | 3.9 | 4% | 0 | 471 |
| Oct | 68 | 40 | 3.1 | 96% | 7 | 174 |
| Nov | 55 | 30 | 2.9 | 100% | 20 | 33 |
| Dec | 46 | 25 | 3.7 | 100% | 24 | 11 |
Monthly normals 1991–2020 at Waterloo, OH (625 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, Ashland, KY, 15 miles south of Pedro, has a last frost 8 days earlier (April 22), a first frost 8 days later (October 23), a season 14 days longer.
When it snows in Pedro, Ohio
The first measurable snow (0.1 inch or more) in Pedro usually arrives around December 15, and the last of the season around March 6. Those are the middle dates across the winters of 1991–2020 at Waterloo, OH, 8.1 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 55 days after the last snow.
Planting calendar for 45659
| When | What to do |
|---|---|
| February 19 – March 5 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 5 – March 19 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 2 – April 16 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 30 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 23 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 1 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 15 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 45659 is 8 miles from Waterloo, OH, which stands at 625 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 45656 (Oak Hill). The 2023 USDA Plant Hardiness Zone Map lists ZIP 45659 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°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.