Frost dates for 15698Yukon, PA
The average last spring frost in Yukon is April 27 and the average first fall frost is October 22, giving a typical growing season of about 177 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 27
- Average first fall frost
- Oct 22
- Growing season
- 177 days
Safer after May 15 (1-in-10 risk)
Possible by Oct 8 (1-in-10 risk)
Last frost typically in 175 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Apr 22 · May 6 · May 22 | Sep 30 · Oct 12 · Oct 25 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 11 · Apr 27 · May 15 | Oct 8 · Oct 22 · Nov 4 | 177 days | 100% |
| Hard freeze (28°F) | Mar 31 · Apr 14 · May 4 | Oct 19 · Nov 1 · Nov 15 | 201 days | 100% |
Planting calendar for Yukon
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Mar 27 – Jun 2 |
| Tomatoes | Transplant outdoors | May 13 – Jul 2 |
| Peppers | Start seeds indoors | Mar 27 – Apr 27 |
| Peppers | Transplant outdoors | May 27 – Jun 27 |
| Eggplant | Start seeds indoors | Apr 13 – May 12 |
| Eggplant | Transplant outdoors | May 27 – Jun 27 |
| Cucumbers | Sow outdoors | May 27 – Jul 12 |
| Summer squash | Sow outdoors | May 13 – Jun 27 |
| Winter squash & pumpkins | Sow outdoors | May 27 – Jun 27 |
| Snap beans | Sow outdoors | May 13 – Aug 4 |
| Sweet corn | Sow outdoors | May 13 – Jul 2 |
| Watermelon & cantaloupe | Sow outdoors | May 27 – Jun 27 |
| Okra | Sow outdoors | May 20 – Jun 12 |
| Peas | Sow outdoors (spring) | Mar 27 – May 12 |
| Potatoes | Plant outdoors (spring) | Mar 27 – May 27 |
| Onions | Start seeds indoors (spring) | Feb 13 – Mar 12 |
| Onions | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (spring) | Mar 9 – Apr 12 |
| Broccoli | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (fall) | Jun 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 27 – Mar 27 |
| Cabbage | Transplant outdoors (spring) | Mar 27 – Apr 27 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 27 – Jun 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 20 – May 3 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 27 – May 17 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Apr 13 – May 3 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 15698 is matched to the NOAA station Donora 1 Sw, PA, 16.7 km away, at 762 ft elevation (281 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Donora 1 Sw, PA (used) | 762 ft | Apr 27 | Oct 22 |
| Mt Pleasant, PA | 1,003 ft | May 1 | Oct 13 |
| Charleroi Lock 4, PA | 749 ft | Apr 13 | Nov 5 |
| Mckeesport, PA | 740 ft | May 2 | Oct 20 |
Frost dates near Yukon
- Wyano, PA 15695 · last Apr 27, first Oct 22
- Madison, PA 15663 · last Apr 18, first Oct 28
- Hutchinson, PA 15640 · last Apr 27, first Oct 22
- Herminie, PA 15637 · last Apr 18, first Oct 28
- Darragh, PA 15625 · last May 2, first Oct 20
- Arona, PA 15617 · last May 1, first Oct 13
- West Newton, PA 15089 · last Apr 27, first Oct 22
- New Stanton, PA 15672 · last May 1, first Oct 13
Frequently asked questions
- When is the last frost in Yukon, PA?
- For ZIP code 15698, the average last spring frost (32°F) is April 27, based on NOAA 1991-2020 climate normals for the Donora 1 Sw, PA weather station. There is a 1-in-10 chance of a frost after May 15.
- When is the first frost in Yukon, PA?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 8, so tender plants are at risk from that point on.
- How long is the growing season in 15698?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 177 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.