Frost dates for 44515Youngstown, OH
The average last spring frost in Youngstown is May 1 and the average first fall frost is October 17, giving a typical growing season of about 167 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 1
- Average first fall frost
- Oct 17
- Growing season
- 167 days
Safer after May 20 (1-in-10 risk)
Possible by Oct 1 (1-in-10 risk)
Last frost typically in 180 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 27 · May 16 · May 31 | Sep 22 · Oct 5 · Oct 20 | 143 days | 100% |
| Frost / freeze (32°F) | Apr 16 · May 1 · May 20 | Oct 1 · Oct 17 · Nov 1 | 167 days | 100% |
| Hard freeze (28°F) | Apr 5 · Apr 20 · May 7 | Oct 15 · Nov 1 · Nov 15 | 194 days | 100% |
Planting calendar for Youngstown
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 31 – Jun 6 |
| Tomatoes | Transplant outdoors | May 17 – Jun 27 |
| Peppers | Start seeds indoors | Mar 31 – May 1 |
| Peppers | Transplant outdoors | May 31 – Jul 1 |
| Eggplant | Start seeds indoors | Apr 17 – May 16 |
| Eggplant | Transplant outdoors | May 31 – Jul 1 |
| Cucumbers | Sow outdoors | May 31 – Jul 7 |
| Summer squash | Sow outdoors | May 17 – Jul 1 |
| Winter squash & pumpkins | Sow outdoors | May 31 – Jul 1 |
| Snap beans | Sow outdoors | May 17 – Jul 30 |
| Sweet corn | Sow outdoors | May 17 – Jun 27 |
| Watermelon & cantaloupe | Sow outdoors | May 31 – Jul 1 |
| Okra | Sow outdoors | May 24 – Jun 16 |
| Peas | Sow outdoors (spring) | Mar 31 – May 16 |
| Potatoes | Plant outdoors (spring) | Mar 31 – May 31 |
| Onions | Start seeds indoors (spring) | Feb 17 – Mar 16 |
| Onions | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (spring) | Mar 13 – Apr 16 |
| Broccoli | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (fall) | Jun 17 – Jun 27 |
| Broccoli | Transplant outdoors (fall) | Jul 17 – Jul 28 |
| Cabbage | Start seeds indoors (spring) | Mar 3 – Mar 31 |
| Cabbage | Transplant outdoors (spring) | Mar 31 – May 1 |
| Cabbage | Start seeds indoors (fall) | Jun 7 – Jul 7 |
| Cabbage | Transplant outdoors (fall) | Jul 7 – Aug 7 |
| Leaf lettuce | Sow outdoors (spring) | Mar 31 – Jun 16 |
| Leaf lettuce | Sow outdoors (fall) | Jul 7 – Aug 23 |
| Spinach | Sow outdoors (spring) | Mar 24 – May 7 |
| Spinach | Sow outdoors (fall) | Jul 24 – Aug 28 |
| Radishes | Sow outdoors (spring) | Mar 31 – May 21 |
| Radishes | Sow outdoors (fall) | Jul 7 – Sep 7 |
| Kale | Sow outdoors (spring) | Apr 17 – May 7 |
| Kale | Sow outdoors (fall) | Jun 30 – Aug 7 |
| Carrots | Sow outdoors (spring) | May 1 – Jun 16 |
| Carrots | Sow outdoors (fall) | Jun 7 – Jul 23 |
| Garlic | Plant outdoors (fall) | Oct 7 – Nov 7 |
Where these dates come from
ZIP code 44515 is matched to the NOAA station Youngstown Rgnl Ap, OH, 18.8 km away, at 1,180 ft elevation (35 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Youngstown Rgnl Ap, OH (used) | 1,180 ft | May 1 | Oct 17 |
| Warren 3 S, OH | 900 ft | May 8 | Oct 12 |
| Mosquito Creek Lake, OH | 910 ft | Apr 30 | Oct 23 |
| Hiram, OH | 1,230 ft | May 1 | Oct 20 |
Frost dates near Youngstown
- Mineral Ridge, OH 44440 · last May 8, first Oct 12
- Youngstown, OH 44509 · last May 8, first Oct 12
- Mc Donald, OH 44437 · last May 8, first Oct 12
- Canfield, OH 44406 · last May 8, first Oct 12
- North Jackson, OH 44451 · last May 8, first Oct 12
- Girard, OH 44420 · last May 8, first Oct 12
- Niles, OH 44446 · last May 8, first Oct 12
- Ellsworth, OH 44416 · last May 8, first Oct 12
Frequently asked questions
- When is the last frost in Youngstown, OH?
- For ZIP code 44515, the average last spring frost (32°F) is May 1, based on NOAA 1991-2020 climate normals for the Youngstown Rgnl Ap, OH weather station. There is a 1-in-10 chance of a frost after May 20.
- When is the first frost in Youngstown, OH?
- The average first fall frost (32°F) is October 17. There is a 1-in-10 chance of frost by October 1, so tender plants are at risk from that point on.
- How long is the growing season in 44515?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 167 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.