Frost dates for 45003College Corner, OH
The average last spring frost in College Corner is April 25 and the average first fall frost is October 20, giving a typical growing season of about 176 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 25
- Average first fall frost
- Oct 20
- Growing season
- 176 days
Safer after May 10 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 175 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 21 · May 5 · May 19 | Sep 26 · Oct 7 · Oct 22 | 155 days | 100% |
| Frost / freeze (32°F) | Apr 11 · Apr 25 · May 10 | Oct 6 · Oct 20 · Nov 1 | 176 days | 100% |
| Hard freeze (28°F) | Mar 29 · Apr 12 · Apr 30 | Oct 16 · Oct 30 · Nov 11 | 198 days | 100% |
Planting calendar for College Corner
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 25 – May 31 |
| Tomatoes | Transplant outdoors | May 11 – Jun 30 |
| Peppers | Start seeds indoors | Mar 25 – Apr 25 |
| Peppers | Transplant outdoors | May 25 – Jun 25 |
| Eggplant | Start seeds indoors | Apr 11 – May 10 |
| Eggplant | Transplant outdoors | May 25 – Jun 25 |
| Cucumbers | Sow outdoors | May 25 – Jul 10 |
| Summer squash | Sow outdoors | May 11 – Jun 25 |
| Winter squash & pumpkins | Sow outdoors | May 25 – Jun 25 |
| Snap beans | Sow outdoors | May 11 – Aug 2 |
| Sweet corn | Sow outdoors | May 11 – Jun 30 |
| Watermelon & cantaloupe | Sow outdoors | May 25 – Jun 25 |
| Okra | Sow outdoors | May 18 – Jun 10 |
| Peas | Sow outdoors (spring) | Mar 25 – May 10 |
| Potatoes | Plant outdoors (spring) | Mar 25 – May 25 |
| Onions | Start seeds indoors (spring) | Feb 11 – Mar 10 |
| Onions | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (spring) | Mar 7 – Apr 10 |
| Broccoli | Transplant outdoors (spring) | Apr 11 – May 10 |
| Broccoli | Start seeds indoors (fall) | Jun 20 – Jun 30 |
| Broccoli | Transplant outdoors (fall) | Jul 20 – Jul 31 |
| Cabbage | Start seeds indoors (spring) | Feb 25 – Mar 25 |
| Cabbage | Transplant outdoors (spring) | Mar 25 – Apr 25 |
| Cabbage | Start seeds indoors (fall) | Jun 10 – Jul 10 |
| Cabbage | Transplant outdoors (fall) | Jul 10 – Aug 10 |
| Leaf lettuce | Sow outdoors (spring) | Mar 25 – Jun 10 |
| Leaf lettuce | Sow outdoors (fall) | Jul 10 – Aug 26 |
| Spinach | Sow outdoors (spring) | Mar 18 – May 1 |
| Spinach | Sow outdoors (fall) | Jul 27 – Aug 31 |
| Radishes | Sow outdoors (spring) | Mar 25 – May 15 |
| Radishes | Sow outdoors (fall) | Jul 10 – Sep 10 |
| Kale | Sow outdoors (spring) | Apr 11 – May 1 |
| Kale | Sow outdoors (fall) | Jul 3 – Aug 10 |
| Carrots | Sow outdoors (spring) | Apr 25 – Jun 10 |
| Carrots | Sow outdoors (fall) | Jun 10 – Jul 26 |
| Garlic | Plant outdoors (fall) | Oct 10 – Nov 10 |
Where these dates come from
ZIP code 45003 is matched to the NOAA station Eaton, OH, 22.7 km away, at 1,002 ft elevation (11 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Eaton, OH (used) | 1,002 ft | Apr 25 | Oct 20 |
| Brookville, IN | 630 ft | Apr 20 | Oct 21 |
| Fairfield, OH | 575 ft | Apr 19 | Oct 22 |
| Richmond Wtr Wks, IN | 1,005 ft | Apr 24 | Oct 20 |
Frost dates near College Corner
- West College Corner, IN 47003 · last Apr 25, first Oct 20
- Bath, IN 47010 · last Apr 25, first Oct 20
- Oxford, OH 45056 · last Apr 25, first Oct 20
- Liberty, IN 47353 · last Apr 25, first Oct 20
- Somerville, OH 45064 · last Apr 25, first Oct 20
- Camden, OH 45311 · last Apr 25, first Oct 20
- Collinsville, OH 45004 · last Apr 22, first Oct 18
- Boston, IN 47324 · last Apr 24, first Oct 20
Frequently asked questions
- When is the last frost in College Corner, OH?
- For ZIP code 45003, the average last spring frost (32°F) is April 25, based on NOAA 1991-2020 climate normals for the Eaton, OH weather station. There is a 1-in-10 chance of a frost after May 10.
- When is the first frost in College Corner, OH?
- The average first fall frost (32°F) is October 20. There is a 1-in-10 chance of frost by October 6, so tender plants are at risk from that point on.
- How long is the growing season in 45003?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 176 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.