Frost dates for 45307Bowersville, OH
The average last spring frost in Bowersville is April 20 and the average first fall frost is October 20, giving a typical growing season of about 180 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 20
- Growing season
- 180 days
Safer after May 6 (1-in-10 risk)
Possible by Oct 5 (1-in-10 risk)
Last frost typically in 170 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 · Apr 30 · May 16 | Sep 24 · Oct 8 · Oct 22 | 159 days | 100% |
| Frost / freeze (32°F) | Apr 6 · Apr 20 · May 6 | Oct 5 · Oct 20 · Nov 1 | 180 days | 100% |
| Hard freeze (28°F) | Mar 24 · Apr 8 · Apr 25 | Oct 17 · Oct 31 · Nov 13 | 204 days | 100% |
Planting calendar for Bowersville
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 – Jun 30 |
| 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 10 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 2 |
| Sweet corn | Sow outdoors | May 6 – Jun 30 |
| 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 20 – Jun 30 |
| Broccoli | Transplant outdoors (fall) | Jul 20 – Jul 31 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 10 – Jul 10 |
| Cabbage | Transplant outdoors (fall) | Jul 10 – Aug 10 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 10 – Aug 26 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Jul 27 – Aug 31 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 10 – Sep 10 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 3 – Aug 10 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 10 – Jul 26 |
| Garlic | Plant outdoors (fall) | Oct 10 – Nov 10 |
Where these dates come from
ZIP code 45307 is matched to the NOAA station Wilmington 3 N, OH, 12.9 km away, at 1,033 ft elevation (56 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Wilmington 3 N, OH (used) | 1,033 ft | Apr 20 | Oct 20 |
| Xenia 6 Sse, OH | 997 ft | Apr 18 | Oct 24 |
| Wfo Wilmington, OH | 1,053 ft | Apr 17 | Oct 22 |
| Cincinnati, OH | 1,056 ft | Apr 19 | Oct 22 |
Frost dates near Bowersville
- Port William, OH 45164 · last Apr 20, first Oct 20
- Jamestown, OH 45335 · last Apr 18, first Oct 24
- Reesville, OH 45166 · last Apr 20, first Oct 20
- Milledgeville, OH 43142 · last Apr 23, first Oct 21
- Sabina, OH 45169 · last Apr 20, first Oct 20
- Jeffersonville, OH 43128 · last Apr 23, first Oct 21
- Wilmington, OH 45177 · last Apr 17, first Oct 22
- Wilberforce, OH 45384 · last Apr 18, first Oct 24
Frequently asked questions
- When is the last frost in Bowersville, OH?
- For ZIP code 45307, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Wilmington 3 N, OH weather station. There is a 1-in-10 chance of a frost after May 6.
- When is the first frost in Bowersville, OH?
- The average first fall frost (32°F) is October 20. There is a 1-in-10 chance of frost by October 5, so tender plants are at risk from that point on.
- How long is the growing season in 45307?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 180 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.