Frost dates for 43037Martinsburg, OH
The average last spring frost in Martinsburg is May 1 and the average first fall frost is October 10, giving a typical growing season of about 161 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 1
- Average first fall frost
- Oct 10
- Growing season
- 161 days
Safer after May 18 (1-in-10 risk)
Possible by Sep 27 (1-in-10 risk)
Last frost typically in 181 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 26 · May 10 · May 26 | Sep 16 · Sep 30 · Oct 12 | 141 days | 100% |
| Frost / freeze (32°F) | Apr 18 · May 1 · May 18 | Sep 27 · Oct 10 · Oct 24 | 161 days | 100% |
| Hard freeze (28°F) | Apr 7 · Apr 21 · May 6 | Oct 7 · Oct 23 · Nov 3 | 182 days | 100% |
Planting calendar for Martinsburg
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 31 – Jun 6 |
| Tomatoes | Transplant outdoors | May 17 – Jun 20 |
| Peppers | Start seeds indoors | Mar 31 – May 1 |
| Peppers | Transplant outdoors | May 31 – Jul 1 |
| Eggplant | Start seeds indoors | Apr 17 – May 16 |
| Eggplant | Transplant outdoors | May 31 – Jul 1 |
| Cucumbers | Sow outdoors | May 31 – Jun 30 |
| Summer squash | Sow outdoors | May 17 – Jul 1 |
| Winter squash & pumpkins | Sow outdoors | May 31 – Jul 1 |
| Snap beans | Sow outdoors | May 17 – Jul 23 |
| Sweet corn | Sow outdoors | May 17 – Jun 20 |
| Watermelon & cantaloupe | Sow outdoors | May 31 – Jul 1 |
| Okra | Sow outdoors | May 24 – Jun 16 |
| Peas | Sow outdoors (spring) | Mar 31 – May 16 |
| Potatoes | Plant outdoors (spring) | Mar 31 – May 31 |
| Onions | Start seeds indoors (spring) | Feb 17 – Mar 16 |
| Onions | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (spring) | Mar 13 – Apr 16 |
| Broccoli | Transplant outdoors (spring) | Apr 17 – May 16 |
| Broccoli | Start seeds indoors (fall) | Jun 10 – Jun 20 |
| Broccoli | Transplant outdoors (fall) | Jul 10 – Jul 21 |
| Cabbage | Start seeds indoors (spring) | Mar 3 – Mar 31 |
| Cabbage | Transplant outdoors (spring) | Mar 31 – May 1 |
| Cabbage | Start seeds indoors (fall) | May 31 – Jun 30 |
| Cabbage | Transplant outdoors (fall) | Jun 30 – Jul 31 |
| Leaf lettuce | Sow outdoors (spring) | Mar 31 – Jun 16 |
| Leaf lettuce | Sow outdoors (fall) | Jun 30 – Aug 16 |
| Spinach | Sow outdoors (spring) | Mar 24 – May 7 |
| Spinach | Sow outdoors (fall) | Jul 17 – Aug 21 |
| Radishes | Sow outdoors (spring) | Mar 31 – May 21 |
| Radishes | Sow outdoors (fall) | Jun 30 – Aug 31 |
| Kale | Sow outdoors (spring) | Apr 17 – May 7 |
| Kale | Sow outdoors (fall) | Jun 23 – Jul 31 |
| Carrots | Sow outdoors (spring) | May 1 – Jun 16 |
| Carrots | Sow outdoors (fall) | May 31 – Jul 16 |
| Garlic | Plant outdoors (fall) | Sep 30 – Oct 31 |
Where these dates come from
ZIP code 43037 is matched to the NOAA station Fredericktown 4 S, OH, 22.3 km away, at 1,050 ft elevation (95 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fredericktown 4 S, OH (used) | 1,050 ft | May 1 | Oct 10 |
| Danville 2 W, OH | 970 ft | May 2 | Oct 8 |
| Newark Wtr Wks, OH | 835 ft | Apr 29 | Oct 16 |
| Centerburg 2 Se, OH | 1,205 ft | Apr 27 | Oct 17 |
Frost dates near Martinsburg
- Utica, OH 43080 · last May 1, first Oct 10
- Bladensburg, OH 43005 · last May 2, first Oct 8
- Saint Louisville, OH 43071 · last Apr 29, first Oct 16
- Gambier, OH 43022 · last May 2, first Oct 8
- Homer, OH 43027 · last May 1, first Oct 10
- Howard, OH 43028 · last May 2, first Oct 8
- Mount Vernon, OH 43050 · last May 1, first Oct 10
- Walhonding, OH 43843 · last May 2, first Oct 8
Frequently asked questions
- When is the last frost in Martinsburg, OH?
- For ZIP code 43037, the average last spring frost (32°F) is May 1, based on NOAA 1991-2020 climate normals for the Fredericktown 4 S, OH weather station. There is a 1-in-10 chance of a frost after May 18.
- When is the first frost in Martinsburg, OH?
- The average first fall frost (32°F) is October 10. There is a 1-in-10 chance of frost by September 27, so tender plants are at risk from that point on.
- How long is the growing season in 43037?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 161 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.