Frost dates for 15030Creighton, PA
The average last spring frost in Creighton is April 16 and the average first fall frost is November 2, giving a typical growing season of about 199 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 16
- Average first fall frost
- Nov 2
- Growing season
- 199 days
Safer after May 2 (1-in-10 risk)
Possible by Oct 20 (1-in-10 risk)
Last frost typically in 164 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 14 · Apr 29 · May 16 | Oct 7 · Oct 21 · Nov 3 | 174 days | 100% |
| Frost / freeze (32°F) | Mar 31 · Apr 16 · May 2 | Oct 20 · Nov 2 · Nov 16 | 199 days | 100% |
| Hard freeze (28°F) | Mar 19 · Apr 3 · Apr 16 | Nov 2 · Nov 14 · Dec 1 | 224 days | 100% |
Planting calendar for Creighton
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 16 – May 22 |
| Tomatoes | Transplant outdoors | May 2 – Jul 13 |
| Peppers | Start seeds indoors | Mar 16 – Apr 16 |
| Peppers | Transplant outdoors | May 16 – Jun 16 |
| Eggplant | Start seeds indoors | Apr 2 – May 1 |
| Eggplant | Transplant outdoors | May 16 – Jun 16 |
| Cucumbers | Sow outdoors | May 16 – Jul 23 |
| Summer squash | Sow outdoors | May 2 – Jun 16 |
| Winter squash & pumpkins | Sow outdoors | May 16 – Jun 16 |
| Snap beans | Sow outdoors | May 2 – Aug 15 |
| Sweet corn | Sow outdoors | May 2 – Jul 13 |
| Watermelon & cantaloupe | Sow outdoors | May 16 – Jun 16 |
| Okra | Sow outdoors | May 9 – Jun 1 |
| Peas | Sow outdoors (spring) | Mar 16 – May 1 |
| Potatoes | Plant outdoors (spring) | Mar 16 – May 16 |
| Onions | Start seeds indoors (spring) | Feb 2 – Mar 1 |
| Onions | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (spring) | Feb 26 – Apr 1 |
| Broccoli | Transplant outdoors (spring) | Apr 2 – May 1 |
| Broccoli | Start seeds indoors (fall) | Jul 3 – Jul 13 |
| Broccoli | Transplant outdoors (fall) | Aug 2 – Aug 13 |
| Cabbage | Start seeds indoors (spring) | Feb 16 – Mar 16 |
| Cabbage | Transplant outdoors (spring) | Mar 16 – Apr 16 |
| Cabbage | Start seeds indoors (fall) | Jun 23 – Jul 23 |
| Cabbage | Transplant outdoors (fall) | Jul 23 – Aug 23 |
| Leaf lettuce | Sow outdoors (spring) | Mar 16 – Jun 1 |
| Leaf lettuce | Sow outdoors (fall) | Jul 23 – Sep 8 |
| Spinach | Sow outdoors (spring) | Mar 9 – Apr 22 |
| Spinach | Sow outdoors (fall) | Aug 9 – Sep 13 |
| Radishes | Sow outdoors (spring) | Mar 16 – May 6 |
| Radishes | Sow outdoors (fall) | Jul 23 – Sep 23 |
| Kale | Sow outdoors (spring) | Apr 2 – Apr 22 |
| Kale | Sow outdoors (fall) | Jul 16 – Aug 23 |
| Carrots | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Carrots | Sow outdoors (fall) | Jun 23 – Aug 8 |
| Garlic | Plant outdoors (fall) | Oct 23 – Nov 23 |
Where these dates come from
ZIP code 15030 is matched to the NOAA station Natrona Lock 4, PA, 6.4 km away, at 760 ft elevation (67 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Natrona Lock 4, PA (used) | 760 ft | Apr 16 | Nov 2 |
| Acmetonia Lock 3, PA | 748 ft | Apr 16 | Nov 1 |
| Schenley Lock 5, PA | 783 ft | Apr 21 | Oct 30 |
| Murrysville 2 Sw, PA | 860 ft | Apr 22 | Oct 25 |
Frost dates near Creighton
- New Kensington, PA 15069 · last Apr 16, first Nov 1
- Harwick, PA 15049 · last Apr 16, first Nov 1
- Rural Ridge, PA 15075 · last Apr 16, first Nov 1
- Tarentum, PA 15084 · last Apr 29, first Oct 20
- Springdale, PA 15144 · last Apr 16, first Nov 1
- Brackenridge, PA 15014 · last Apr 16, first Nov 2
- Cheswick, PA 15024 · last Apr 16, first Nov 1
- Russellton, PA 15076 · last May 7, first Oct 14
Frequently asked questions
- When is the last frost in Creighton, PA?
- For ZIP code 15030, the average last spring frost (32°F) is April 16, based on NOAA 1991-2020 climate normals for the Natrona Lock 4, PA weather station. There is a 1-in-10 chance of a frost after May 2.
- When is the first frost in Creighton, PA?
- The average first fall frost (32°F) is November 2. There is a 1-in-10 chance of frost by October 20, so tender plants are at risk from that point on.
- How long is the growing season in 15030?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 199 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.