Frost dates for 45865Minster, OH
The average last spring frost in Minster is April 27 and the average first fall frost is October 20, giving a typical growing season of about 175 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 27
- Average first fall frost
- Oct 20
- Growing season
- 175 days
Safer after May 12 (1-in-10 risk)
Possible by Oct 5 (1-in-10 risk)
Last frost typically in 177 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 22 · May 5 · May 19 | Sep 25 · Oct 8 · Oct 22 | 155 days | 100% |
| Frost / freeze (32°F) | Apr 12 · Apr 27 · May 12 | Oct 5 · Oct 20 · Nov 2 | 175 days | 100% |
| Hard freeze (28°F) | Apr 1 · Apr 16 · May 2 | Oct 17 · Oct 31 · Nov 12 | 197 days | 100% |
Planting calendar for Minster
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 27 – Jun 2 |
| Tomatoes | Transplant outdoors | May 13 – Jun 30 |
| Peppers | Start seeds indoors | Mar 27 – Apr 27 |
| Peppers | Transplant outdoors | May 27 – Jun 27 |
| Eggplant | Start seeds indoors | Apr 13 – May 12 |
| Eggplant | Transplant outdoors | May 27 – Jun 27 |
| Cucumbers | Sow outdoors | May 27 – Jul 10 |
| Summer squash | Sow outdoors | May 13 – Jun 27 |
| Winter squash & pumpkins | Sow outdoors | May 27 – Jun 27 |
| Snap beans | Sow outdoors | May 13 – Aug 2 |
| Sweet corn | Sow outdoors | May 13 – Jun 30 |
| Watermelon & cantaloupe | Sow outdoors | May 27 – Jun 27 |
| Okra | Sow outdoors | May 20 – Jun 12 |
| Peas | Sow outdoors (spring) | Mar 27 – May 12 |
| Potatoes | Plant outdoors (spring) | Mar 27 – May 27 |
| Onions | Start seeds indoors (spring) | Feb 13 – Mar 12 |
| Onions | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (spring) | Mar 9 – Apr 12 |
| Broccoli | Transplant outdoors (spring) | Apr 13 – May 12 |
| Broccoli | Start seeds indoors (fall) | Jun 20 – Jun 30 |
| Broccoli | Transplant outdoors (fall) | Jul 20 – Jul 31 |
| Cabbage | Start seeds indoors (spring) | Feb 27 – Mar 27 |
| Cabbage | Transplant outdoors (spring) | Mar 27 – Apr 27 |
| Cabbage | Start seeds indoors (fall) | Jun 10 – Jul 10 |
| Cabbage | Transplant outdoors (fall) | Jul 10 – Aug 10 |
| Leaf lettuce | Sow outdoors (spring) | Mar 27 – Jun 12 |
| Leaf lettuce | Sow outdoors (fall) | Jul 10 – Aug 26 |
| Spinach | Sow outdoors (spring) | Mar 20 – May 3 |
| Spinach | Sow outdoors (fall) | Jul 27 – Aug 31 |
| Radishes | Sow outdoors (spring) | Mar 27 – May 17 |
| Radishes | Sow outdoors (fall) | Jul 10 – Sep 10 |
| Kale | Sow outdoors (spring) | Apr 13 – May 3 |
| Kale | Sow outdoors (fall) | Jul 3 – Aug 10 |
| Carrots | Sow outdoors (spring) | Apr 27 – Jun 12 |
| Carrots | Sow outdoors (fall) | Jun 10 – Jul 26 |
| Garlic | Plant outdoors (fall) | Oct 10 – Nov 10 |
Where these dates come from
ZIP code 45865 is matched to the NOAA station Sidney 1 S, OH, 23.1 km away, at 940 ft elevation (21 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sidney 1 S, OH (used) | 940 ft | Apr 27 | Oct 20 |
| Celina 3 Ne, OH | 866 ft | Apr 27 | Oct 19 |
| Piqua Wwtp, OH | 853 ft | Apr 18 | Oct 23 |
| Greenville Wtp, OH | 1,030 ft | Apr 21 | Oct 20 |
Frost dates near Minster
- New Bremen, OH 45869 · last Apr 27, first Oct 19
- Fort Loramie, OH 45845 · last Apr 27, first Oct 20
- Kettlersville, OH 45336 · last Apr 27, first Oct 20
- Chickasaw, OH 45826 · last Apr 27, first Oct 19
- Maria Stein, OH 45860 · last Apr 27, first Oct 19
- Yorkshire, OH 45388 · last Apr 27, first Oct 20
- Osgood, OH 45351 · last Apr 27, first Oct 19
- New Knoxville, OH 45871 · last Apr 27, first Oct 19
Frequently asked questions
- When is the last frost in Minster, OH?
- For ZIP code 45865, the average last spring frost (32°F) is April 27, based on NOAA 1991-2020 climate normals for the Sidney 1 S, OH weather station. There is a 1-in-10 chance of a frost after May 12.
- When is the first frost in Minster, 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 45865?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 175 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.