Frost dates for 45647Londonderry, OH
The average last spring frost in Londonderry is April 21 and the average first fall frost is October 22, giving a typical growing season of about 182 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 21
- Average first fall frost
- Oct 22
- Growing season
- 182 days
Safer after May 9 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 169 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 17 | Sep 27 · Oct 12 · Oct 25 | 163 days | 100% |
| Frost / freeze (32°F) | Apr 4 · Apr 21 · May 9 | Oct 6 · Oct 22 · Nov 4 | 182 days | 100% |
| Hard freeze (28°F) | Mar 23 · Apr 9 · Apr 30 | Oct 18 · Nov 1 · Nov 15 | 205 days | 100% |
Planting calendar for Londonderry
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 21 – May 27 |
| Tomatoes | Transplant outdoors | May 7 – Jul 2 |
| Peppers | Start seeds indoors | Mar 21 – Apr 21 |
| Peppers | Transplant outdoors | May 21 – Jun 21 |
| Eggplant | Start seeds indoors | Apr 7 – May 6 |
| Eggplant | Transplant outdoors | May 21 – Jun 21 |
| Cucumbers | Sow outdoors | May 21 – Jul 12 |
| Summer squash | Sow outdoors | May 7 – Jun 21 |
| Winter squash & pumpkins | Sow outdoors | May 21 – Jun 21 |
| Snap beans | Sow outdoors | May 7 – Aug 4 |
| Sweet corn | Sow outdoors | May 7 – Jul 2 |
| Watermelon & cantaloupe | Sow outdoors | May 21 – Jun 21 |
| Okra | Sow outdoors | May 14 – Jun 6 |
| Peas | Sow outdoors (spring) | Mar 21 – May 6 |
| Potatoes | Plant outdoors (spring) | Mar 21 – May 21 |
| Onions | Start seeds indoors (spring) | Feb 7 – Mar 6 |
| Onions | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (spring) | Mar 3 – Apr 6 |
| Broccoli | Transplant outdoors (spring) | Apr 7 – May 6 |
| Broccoli | Start seeds indoors (fall) | Jun 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 21 – Mar 21 |
| Cabbage | Transplant outdoors (spring) | Mar 21 – Apr 21 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 21 – Jun 6 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 14 – Apr 27 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 21 – May 11 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Apr 7 – Apr 27 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 21 – Jun 6 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 45647 is matched to the NOAA station Waverly, OH, 24.6 km away, at 572 ft elevation (45 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Waverly, OH (used) | 572 ft | Apr 21 | Oct 22 |
| Chillicothe Mound City, OH | 650 ft | Apr 20 | Oct 22 |
| Jackson 3 Nw, OH | 845 ft | Apr 22 | Oct 21 |
| Circleville, OH | 675 ft | Apr 17 | Oct 28 |
Frost dates near Londonderry
- Richmond Dale, OH 45673 · last Apr 21, first Oct 22
- Ray, OH 45672 · last Apr 22, first Oct 21
- Chillicothe, OH 45601 · last Apr 20, first Oct 22
- Kingston, OH 45644 · last Apr 17, first Oct 28
- Hallsville, OH 45633 · last Apr 22, first Oct 24
- Adelphi, OH 43101 · last Apr 22, first Oct 24
- South Bloomingville, OH 43152 · last Apr 30, first Oct 14
- Laurelville, OH 43135 · last Apr 22, first Oct 24
Frequently asked questions
- When is the last frost in Londonderry, OH?
- For ZIP code 45647, the average last spring frost (32°F) is April 21, based on NOAA 1991-2020 climate normals for the Waverly, OH weather station. There is a 1-in-10 chance of a frost after May 9.
- When is the first frost in Londonderry, OH?
- The average first fall frost (32°F) is October 22. 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 45647?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 182 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.