Frost dates for 43619Northwood, OH
The average last spring frost in Northwood is April 20 and the average first fall frost is October 27, giving a typical growing season of about 188 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 27
- Growing season
- 188 days
Safer after May 7 (1-in-10 risk)
Possible by Oct 14 (1-in-10 risk)
Last frost typically in 168 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 17 · May 1 · May 16 | Oct 1 · Oct 15 · Oct 28 | 165 days | 100% |
| Frost / freeze (32°F) | Apr 5 · Apr 20 · May 7 | Oct 14 · Oct 27 · Nov 9 | 188 days | 100% |
| Hard freeze (28°F) | Mar 25 · Apr 8 · Apr 25 | Oct 26 · Nov 7 · Nov 21 | 211 days | 100% |
Planting calendar for Northwood
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 20 – May 26 |
| Tomatoes | Transplant outdoors | May 6 – Jul 7 |
| Peppers | Start seeds indoors | Mar 20 – Apr 20 |
| Peppers | Transplant outdoors | May 20 – Jun 20 |
| Eggplant | Start seeds indoors | Apr 6 – May 5 |
| Eggplant | Transplant outdoors | May 20 – Jun 20 |
| Cucumbers | Sow outdoors | May 20 – Jul 17 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 9 |
| Sweet corn | Sow outdoors | May 6 – Jul 7 |
| Watermelon & cantaloupe | Sow outdoors | May 20 – Jun 20 |
| Okra | Sow outdoors | May 13 – Jun 5 |
| Peas | Sow outdoors (spring) | Mar 20 – May 5 |
| Potatoes | Plant outdoors (spring) | Mar 20 – May 20 |
| Onions | Start seeds indoors (spring) | Feb 6 – Mar 5 |
| Onions | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (spring) | Mar 2 – Apr 5 |
| Broccoli | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (fall) | Jun 27 – Jul 7 |
| Broccoli | Transplant outdoors (fall) | Jul 27 – Aug 7 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 17 – Jul 17 |
| Cabbage | Transplant outdoors (fall) | Jul 17 – Aug 17 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 17 – Sep 2 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Aug 3 – Sep 7 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 17 – Sep 17 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 10 – Aug 17 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 17 – Aug 2 |
| Garlic | Plant outdoors (fall) | Oct 17 – Nov 17 |
Where these dates come from
ZIP code 43619 is matched to the NOAA station Toledo Metcalf Fld, OH, 5 km away, at 622 ft elevation (9 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Toledo Metcalf Fld, OH (used) | 622 ft | Apr 20 | Oct 27 |
| Toledo Express Ap, OH | 669 ft | Apr 22 | Oct 24 |
| Bowling Green Wwtp, OH | 675 ft | Apr 22 | Oct 25 |
| Monroe, MI | 586 ft | Apr 23 | Oct 23 |
Frost dates near Northwood
- Walbridge, OH 43465 · last Apr 20, first Oct 27
- Oregon, OH 43616 · last Apr 20, first Oct 27
- Toledo, OH 43605 · last Apr 20, first Oct 27
- Millbury, OH 43447 · last Apr 20, first Oct 27
- Rossford, OH 43460 · last Apr 20, first Oct 27
- Harbor View, OH 43434 · last Apr 20, first Oct 27
- Clay Center, OH 43408 · last Apr 20, first Oct 27
- Stony Ridge, OH 43463 · last Apr 20, first Oct 27
Frequently asked questions
- When is the last frost in Northwood, OH?
- For ZIP code 43619, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Toledo Metcalf Fld, OH weather station. There is a 1-in-10 chance of a frost after May 7.
- When is the first frost in Northwood, OH?
- The average first fall frost (32°F) is October 27. There is a 1-in-10 chance of frost by October 14, so tender plants are at risk from that point on.
- How long is the growing season in 43619?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 188 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.