Frost dates for 44503Youngstown, OH
The average last spring frost in Youngstown is May 8 and the average first fall frost is October 12, giving a typical growing season of about 157 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 8
- Average first fall frost
- Oct 12
- Growing season
- 157 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 30 (1-in-10 risk)
Last frost typically in 186 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) | May 2 · May 19 · Jun 3 | Sep 19 · Oct 2 · Oct 14 | 134 days | 100% |
| Frost / freeze (32°F) | Apr 23 · May 8 · May 25 | Sep 30 · Oct 12 · Oct 26 | 157 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 27 · May 15 | Oct 8 · Oct 26 · Nov 7 | 179 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 | Apr 7 – Jun 13 |
| Tomatoes | Transplant outdoors | May 24 – Jun 22 |
| Peppers | Start seeds indoors | Apr 7 – May 8 |
| Peppers | Transplant outdoors | Jun 7 – Jul 8 |
| Eggplant | Start seeds indoors | Apr 24 – May 23 |
| Eggplant | Transplant outdoors | Jun 7 – Jul 8 |
| Cucumbers | Sow outdoors | Jun 7 – Jul 2 |
| Summer squash | Sow outdoors | May 24 – Jul 8 |
| Winter squash & pumpkins | Sow outdoors | Jun 7 – Jul 8 |
| Snap beans | Sow outdoors | May 24 – Jul 25 |
| Sweet corn | Sow outdoors | May 24 – Jun 22 |
| Watermelon & cantaloupe | Sow outdoors | Jun 7 – Jul 8 |
| Okra | Sow outdoors | May 31 – Jun 23 |
| Peas | Sow outdoors (spring) | Apr 7 – May 23 |
| Potatoes | Plant outdoors (spring) | Apr 7 – Jun 7 |
| Onions | Start seeds indoors (spring) | Feb 24 – Mar 23 |
| Onions | Transplant outdoors (spring) | Apr 24 – May 23 |
| Broccoli | Start seeds indoors (spring) | Mar 20 – Apr 23 |
| Broccoli | Transplant outdoors (spring) | Apr 24 – May 23 |
| Broccoli | Start seeds indoors (fall) | Jun 12 – Jun 22 |
| Broccoli | Transplant outdoors (fall) | Jul 12 – Jul 23 |
| Cabbage | Start seeds indoors (spring) | Mar 10 – Apr 7 |
| Cabbage | Transplant outdoors (spring) | Apr 7 – May 8 |
| Cabbage | Start seeds indoors (fall) | Jun 2 – Jul 2 |
| Cabbage | Transplant outdoors (fall) | Jul 2 – Aug 2 |
| Leaf lettuce | Sow outdoors (spring) | Apr 7 – Jun 23 |
| Leaf lettuce | Sow outdoors (fall) | Jul 2 – Aug 18 |
| Spinach | Sow outdoors (spring) | Mar 31 – May 14 |
| Spinach | Sow outdoors (fall) | Jul 19 – Aug 23 |
| Radishes | Sow outdoors (spring) | Apr 7 – May 28 |
| Radishes | Sow outdoors (fall) | Jul 2 – Sep 2 |
| Kale | Sow outdoors (spring) | Apr 24 – May 14 |
| Kale | Sow outdoors (fall) | Jun 25 – Aug 2 |
| Carrots | Sow outdoors (spring) | May 8 – Jun 23 |
| Carrots | Sow outdoors (fall) | Jun 2 – Jul 18 |
| Garlic | Plant outdoors (fall) | Oct 2 – Nov 2 |
Where these dates come from
ZIP code 44503 is matched to the NOAA station Warren 3 S, OH, 17.4 km away, at 900 ft elevation (37 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Warren 3 S, OH (used) | 900 ft | May 8 | Oct 12 |
| Youngstown Rgnl Ap, OH | 1,180 ft | May 1 | Oct 17 |
| Mosquito Creek Lake, OH | 910 ft | Apr 30 | Oct 23 |
| New Castle 1 N, PA | 825 ft | Apr 30 | Oct 23 |
Frost dates near Youngstown
- Youngstown, OH 44555 · last May 8, first Oct 12
- Campbell, OH 44405 · last May 1, first Oct 17
- Struthers, OH 44471 · last Apr 30, first Oct 23
- Girard, OH 44420 · last May 8, first Oct 12
- Hubbard, OH 44425 · last May 8, first Oct 12
- Mc Donald, OH 44437 · last May 8, first Oct 12
- Mineral Ridge, OH 44440 · last May 8, first Oct 12
- Lowellville, OH 44436 · last Apr 30, first Oct 23
Frequently asked questions
- When is the last frost in Youngstown, OH?
- For ZIP code 44503, the average last spring frost (32°F) is May 8, based on NOAA 1991-2020 climate normals for the Warren 3 S, OH weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Youngstown, OH?
- The average first fall frost (32°F) is October 12. There is a 1-in-10 chance of frost by September 30, so tender plants are at risk from that point on.
- How long is the growing season in 44503?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 157 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.