Frost dates for 25413Bunker Hill, WV
The average last spring frost in Bunker Hill is April 20 and the average first fall frost is October 22, giving a typical growing season of about 183 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 22
- Growing season
- 183 days
Safer after May 12 (1-in-10 risk)
Possible by Oct 7 (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 5 · May 22 | Sep 29 · Oct 11 · Oct 25 | 158 days | 100% |
| Frost / freeze (32°F) | Apr 3 · Apr 20 · May 12 | Oct 7 · Oct 22 · Nov 4 | 183 days | 100% |
| Hard freeze (28°F) | Mar 22 · Apr 4 · Apr 22 | Oct 16 · Nov 1 · Nov 14 | 208 days | 100% |
Planting calendar for Bunker Hill
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 2 |
| 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 12 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 4 |
| Sweet corn | Sow outdoors | May 6 – Jul 2 |
| 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 22 – Jul 2 |
| Broccoli | Transplant outdoors (fall) | Jul 22 – Aug 2 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 12 – Jul 12 |
| Cabbage | Transplant outdoors (fall) | Jul 12 – Aug 12 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 12 – Aug 28 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Jul 29 – Sep 2 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 12 – Sep 12 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 5 – Aug 12 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 12 – Jul 28 |
| Garlic | Plant outdoors (fall) | Oct 12 – Nov 12 |
Where these dates come from
ZIP code 25413 is matched to the NOAA station Martinsburg E Wv Rgnl Ap, WV, 9.9 km away, at 534 ft elevation (1 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Martinsburg E Wv Rgnl Ap, WV (used) | 534 ft | Apr 20 | Oct 22 |
| Martinsburg 2, WV | 460 ft | Apr 17 | Oct 23 |
| Winchester 7 Se, VA | 680 ft | Apr 25 | Oct 18 |
| Winchester, VA | 720 ft | Apr 11 | Oct 29 |
Frost dates near Bunker Hill
- Ridgeway, WV 25440 · last Apr 20, first Oct 22
- Inwood, WV 25428 · last Apr 20, first Oct 22
- Kearneysville, WV 25430 · last Apr 20, first Oct 22
- Gerrardstown, WV 25420 · last Apr 20, first Oct 22
- Clear Brook, VA 22624 · last Apr 25, first Oct 18
- Brucetown, VA 22622 · last Apr 25, first Oct 18
- Glengary, WV 25421 · last Apr 20, first Oct 22
- Martinsburg, WV 25405 · last Apr 20, first Oct 22
Frequently asked questions
- When is the last frost in Bunker Hill, WV?
- For ZIP code 25413, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Martinsburg E Wv Rgnl Ap, WV weather station. There is a 1-in-10 chance of a frost after May 12.
- When is the first frost in Bunker Hill, WV?
- The average first fall frost (32°F) is October 22. There is a 1-in-10 chance of frost by October 7, so tender plants are at risk from that point on.
- How long is the growing season in 25413?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 183 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.