USDA Hardiness Zone 6a
Frost Dates for 14138 — South Dayton, New York
NOAA 1991–2020 normals from Perrysburg, NY (1,210 ft), 7 miles northeast.
Updated
In South Dayton, the last spring frost (32°F) is around May 3 in half of years and has passed by May 16 in nine years out of ten. The first fall frost comes around October 20, as early as October 4 one year in ten, leaving a typical freeze-free season of 168 days (NOAA, Perrysburg, NY).
- Last spring frost
- May 3
- First fall frost
- October 20
- Growing season
- 168 days
- Hardiness zone
- 6a
50% probability
50% probability
freeze-free, 50%
-10 to -5°F (-23.3 to -20.6°C) coldest night
- First snow
- November 10
- Last snow
- April 16
- Winters with snow
- 100%
- Snow per year
- 208.3"
median, 1991–2020
median, 1991–2020
16 of 16 observed
NOAA normal
Frost risk by date in South Dayton
Half of springs at Perrysburg, NY see their last 32°F night by May 3; only one in ten is past it by April 21, and one in ten still has one after May 16. Planting tender crops after May 8 leaves a 30% risk of a frost on them, after May 11 20%, and after May 16 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 83% of the 173 New York stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 20 in half of years, as early as October 4 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 13 days later, around November 2; in spring the one-in-ten date for 28°F is May 7, 9 days before the 32°F one. The freeze-free season lasts 168 days in a typical year, longer than at 62% of the 173 New York stations; it reaches 188 days one year in ten and falls short of 149 one year in ten. On average 149 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 12, and return around October 7. Severe cold of 16°F or below comes every winter, usually between December 4 and March 23.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 28 | May 2 | May 6 | May 9 | May 12 | May 15 | May 18 | May 21 | May 26 |
| 32°F | Apr 21 | Apr 25 | Apr 28 | Apr 30 | May 3 | May 6 | May 8 | May 11 | May 16 |
| 28°F | Apr 11 | Apr 15 | Apr 18 | Apr 21 | Apr 23 | Apr 26 | Apr 30 | May 2 | May 7 |
| 24°F | Apr 1 | Apr 4 | Apr 7 | Apr 10 | Apr 12 | Apr 15 | Apr 17 | Apr 20 | Apr 24 |
| 20°F | Mar 17 | Mar 23 | Mar 29 | Apr 1 | Apr 3 | Apr 5 | Apr 7 | Apr 10 | Apr 15 |
| 16°F | Mar 7 | Mar 13 | Mar 17 | Mar 20 | Mar 23 | Mar 26 | Mar 31 | Apr 2 | Apr 6 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 23 | Sep 28 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 13 | Oct 17 | Oct 22 |
| 32°F | Oct 4 | Oct 9 | Oct 13 | Oct 16 | Oct 20 | Oct 23 | Oct 26 | Oct 31 | Nov 5 |
| 28°F | Oct 17 | Oct 25 | Oct 29 | Nov 1 | Nov 2 | Nov 6 | Nov 9 | Nov 12 | Nov 17 |
| 24°F | Nov 1 | Nov 5 | Nov 8 | Nov 11 | Nov 14 | Nov 17 | Nov 20 | Nov 25 | Dec 1 |
| 20°F | Nov 8 | Nov 13 | Nov 17 | Nov 20 | Nov 24 | Nov 28 | Dec 1 | Dec 5 | Dec 11 |
| 16°F | Nov 17 | Nov 22 | Nov 27 | Dec 1 | Dec 4 | Dec 8 | Dec 12 | Dec 16 | Dec 23 |
Freeze probabilities 1991–2020 at Perrysburg, NY, 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 14138 →Compare South Dayton with another place →
Weather by month in South Dayton
July is the warmest month at Perrysburg, NY, averaging 79°F by day and 59°F at night; January is the coldest at 31°F and 16°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 58% of years.
Warmth for growing adds up to 2,383 growing degree days a year (base 50°F), fewer than at 57% of the 173 New York stations. 33% of them (787) have built up by the end of June, and July adds the most, 584. Precipitation totals 53.9 inches a year, most in December (5.8") and least in May (3.7"); May to September bring 39% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 31 | 16 | 4.9 | 100% | 29 | 1 |
| Feb | 34 | 16 | 4.2 | 100% | 25 | 2 |
| Mar | 43 | 23 | 3.8 | 100% | 25 | 15 |
| Apr | 55 | 32 | 4.0 | 100% | 17 | 49 |
| May | 68 | 45 | 3.7 | 58% | 1 | 252 |
| Jun | 76 | 55 | 4.2 | 0% | 0 | 469 |
| Jul | 79 | 59 | 3.7 | 0% | 0 | 584 |
| Aug | 78 | 58 | 4.5 | 0% | 0 | 562 |
| Sep | 71 | 51 | 5.0 | 5% | 0 | 337 |
| Oct | 59 | 40 | 5.3 | 80% | 3 | 94 |
| Nov | 47 | 31 | 4.8 | 100% | 21 | 17 |
| Dec | 36 | 22 | 5.8 | 100% | 27 | 1 |
Monthly normals 1991–2020 at Perrysburg, NY (1,210 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, Dunkirk Chautauqua Airport, NY, 14 miles northwest of South Dayton and 544 feet lower, has a last frost 2 days later (May 5), the same first-frost date, a season 1 day shorter.
When it snows in South Dayton, New York
The first measurable snow (0.1 inch or more) in South Dayton usually arrives around November 10, and the last of the season around April 16. Those are the middle dates across the winters of 1991–2020 at Perrysburg, NY, 6.9 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 17 days after the last snow.
Planting calendar for 14138
| When | What to do |
|---|---|
| February 22 – March 8 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 8 – March 22 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 5 – April 19 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| May 3 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 28 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 6 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 20 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 14138 is 7 miles from Perrysburg, NY, which stands at 1,210 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 5 other ZIP codes share the station; its figures are presented in full for 14006 (Angola). The 2023 USDA Plant Hardiness Zone Map lists ZIP 14138 in zone 6a, the band where the coldest night of the year averaged -10 to -5°F (-23.3 to -20.6°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.