USDA Hardiness Zone 6a
Frost Dates for 16150 — Sharpsville, Pennsylvania
NOAA 1991–2020 normals from Youngstown Regional Airport, OH (1,180 ft), 11 miles west.
Updated
In Sharpsville, the last spring frost (32°F) is around May 1 in half of years and has passed by May 20 in nine years out of ten. The first fall frost comes around October 17, as early as October 1 one year in ten, leaving a typical freeze-free season of 167 days (NOAA, Youngstown Regional Airport, OH).
- Last spring frost
- May 1
- First fall frost
- October 17
- Growing season
- 167 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 7
- Last snow
- April 7
- Winters with snow
- 100%
- Snow per year
- 67.8"
median, 1991–2020
median, 1991–2020
29 of 29 observed
NOAA normal
Frost risk by date in Sharpsville
Half of springs at Youngstown Regional Airport, OH see their last 32°F night by May 1; only one in ten is past it by April 16, and one in ten still has one after May 20. Planting tender crops after May 9 leaves a 30% risk of a frost on them, after May 15 20%, and after May 20 10%. The 19 days between the even-odds date and the one-in-ten date is wider than at 90% of the 176 Pennsylvania stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 17 in half of years, as early as October 1 one year in ten, and holds off past November 1 one year in ten. A hard freeze of 28°F follows 15 days later, around November 1; in spring the one-in-ten date for 28°F is May 7, 13 days before the 32°F one. The freeze-free season lasts 167 days in a typical year, shorter than at 65% of the 176 Pennsylvania stations; it reaches 190 days one year in ten and falls short of 145 one year in ten. On average 127 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 15 days longer, to about May 16, and return around October 5. Severe cold of 16°F or below comes every winter, usually between December 7 and March 18.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 27 | May 2 | May 7 | May 11 | May 16 | May 18 | May 22 | May 26 | May 31 |
| 32°F | Apr 16 | Apr 21 | Apr 25 | Apr 28 | May 1 | May 4 | May 9 | May 15 | May 20 |
| 28°F | Apr 5 | Apr 9 | Apr 14 | Apr 17 | Apr 20 | Apr 22 | Apr 26 | Apr 30 | May 7 |
| 24°F | Mar 24 | Mar 30 | Apr 2 | Apr 4 | Apr 6 | Apr 9 | Apr 14 | Apr 17 | Apr 21 |
| 20°F | Mar 11 | Mar 17 | Mar 21 | Mar 25 | Mar 28 | Mar 31 | Apr 2 | Apr 5 | Apr 10 |
| 16°F | Mar 1 | Mar 7 | Mar 11 | Mar 15 | Mar 18 | Mar 20 | Mar 24 | Mar 28 | Mar 31 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 22 | Sep 27 | Oct 1 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 14 | Oct 20 |
| 32°F | Oct 1 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 21 | Oct 24 | Oct 28 | Nov 1 |
| 28°F | Oct 15 | Oct 20 | Oct 25 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 10 | Nov 15 |
| 24°F | Nov 1 | Nov 4 | Nov 6 | Nov 9 | Nov 12 | Nov 15 | Nov 19 | Nov 24 | Nov 30 |
| 20°F | Nov 8 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Nov 28 | Dec 1 | Dec 6 | Dec 12 |
| 16°F | Nov 18 | Nov 25 | Nov 29 | Dec 3 | Dec 7 | Dec 10 | Dec 15 | Dec 20 | Dec 24 |
Freeze probabilities 1991–2020 at Youngstown Regional Airport, 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 16150 →Compare Sharpsville with another place →
Weather by month in Sharpsville
July is the warmest month at Youngstown Regional Airport, OH, averaging 83°F by day and 60°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 51% of years.
Warmth for growing adds up to 2,840 growing degree days a year (base 50°F), fewer than at 60% of the 176 Pennsylvania stations. 34% of them (975) have built up by the end of June, and July adds the most, 666. Precipitation totals 41.2 inches a year, most in July (4.3") and least in February (2.5"); May to September bring 47% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 34 | 19 | 3.0 | 100% | 27 | 3 |
| Feb | 37 | 21 | 2.5 | 100% | 24 | 4 |
| Mar | 47 | 28 | 3.2 | 100% | 22 | 29 |
| Apr | 60 | 38 | 3.8 | 100% | 9 | 109 |
| May | 71 | 48 | 3.7 | 51% | 1 | 305 |
| Jun | 79 | 56 | 3.9 | 0% | 0 | 525 |
| Jul | 83 | 60 | 4.3 | 0% | 0 | 666 |
| Aug | 81 | 59 | 3.5 | 0% | 0 | 618 |
| Sep | 74 | 52 | 3.8 | 6% | <1 | 399 |
| Oct | 62 | 42 | 3.3 | 86% | 4 | 143 |
| Nov | 50 | 33 | 3.0 | 100% | 15 | 32 |
| Dec | 39 | 26 | 3.2 | 100% | 25 | 5 |
Monthly normals 1991–2020 at Youngstown Regional Airport, OH (1,180 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, Mercer, PA, 12 miles east of Sharpsville, has a last frost 14 days later (May 15), a first frost 14 days earlier (October 3), a season 27 days shorter.
When it snows in Sharpsville, Pennsylvania
The first measurable snow (0.1 inch or more) in Sharpsville usually arrives around November 7, and the last of the season around April 7. Those are the middle dates across the winters of 1991–2020 at Youngstown Regional Airport, 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 24 days after the last snow.
Planting calendar for 16150
| When | What to do |
|---|---|
| February 20 – March 6 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 6 – March 20 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 3 – April 17 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| May 1 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 25 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 3 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 17 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 16150 is 11 miles from Youngstown Regional Airport, OH, which stands at 1,180 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 13 other ZIP codes share the station; its figures are presented in full for 16148 (Hermitage). The 2023 USDA Plant Hardiness Zone Map lists ZIP 16150 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.
Frost dates across Pennsylvania →
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.