Last spring frost
Apr 24
Frost Dates for Strabane, PA
First fall frost
Oct 23
Growing season
181 days
Hardiness zone
6b
In an average year around Strabane, PA, the last spring frost (32°F) is about Apr 24 and the first fall frost is about Oct 23, giving roughly a 181-day growing season. To be safe most years, wait until Apr 8 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 25 | May 6 | Apr 19 |
| Freeze (32°F) | May 18 | Apr 24 | Apr 8 |
| Hard (28°F) | May 4 | Apr 11 | Mar 29 |
| Severe (24°F) | Apr 16 | Apr 1 | Mar 16 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 25 | May 20 | May 15 | May 11 | May 6 | May 2 | Apr 29 | Apr 24 | Apr 19 |
| 32°F | May 18 | May 10 | May 3 | Apr 30 | Apr 24 | Apr 21 | Apr 17 | Apr 13 | Apr 8 |
| 28°F | May 4 | Apr 24 | Apr 19 | Apr 15 | Apr 11 | Apr 8 | Apr 5 | Apr 2 | Mar 29 |
| 24°F | Apr 16 | Apr 10 | Apr 6 | Apr 3 | Apr 1 | Mar 30 | Mar 26 | Mar 22 | Mar 16 |
| 20°F | Apr 5 | Apr 1 | Mar 29 | Mar 26 | Mar 23 | Mar 19 | Mar 16 | Mar 12 | Mar 6 |
| 16°F | Mar 29 | Mar 25 | Mar 20 | Mar 17 | Mar 14 | Mar 10 | Mar 7 | Mar 1 | Feb 24 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Sep 29 | Oct 11 | Oct 25 |
| Freeze (32°F) | Oct 8 | Oct 23 | Nov 5 |
| Hard (28°F) | Oct 19 | Nov 2 | Nov 16 |
| Severe (24°F) | Nov 1 | Nov 14 | Dec 2 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 29 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 14 | Oct 17 | Oct 20 | Oct 25 |
| 32°F | Oct 8 | Oct 13 | Oct 17 | Oct 20 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 5 |
| 28°F | Oct 19 | Oct 24 | Oct 28 | Nov 1 | Nov 2 | Nov 5 | Nov 8 | Nov 11 | Nov 16 |
| 24°F | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 14 | Nov 17 | Nov 21 | Nov 27 | Dec 2 |
| 20°F | Nov 7 | Nov 12 | Nov 17 | Nov 21 | Nov 27 | Dec 1 | Dec 3 | Dec 8 | Dec 16 |
| 16°F | Nov 16 | Nov 25 | Dec 1 | Dec 4 | Dec 8 | Dec 13 | Dec 19 | Dec 25 | Jan 1 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Washington 3 Ne, Pa, about 5 miles away@if(!empty($station['elevation_ft'])), at 1,300 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Strabane, PA?
On average, the last spring frost (32°F) around Strabane, PA is about Apr 24. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 8.
When is the first frost in the fall?
The first fall frost around Strabane, PA typically arrives about Oct 23. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 24 on average, or Apr 8 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 181 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 15363 Planting calendar → Pennsylvania frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026