Frost dates for 26170Saint Marys, WV
The average last spring frost in Saint Marys is April 23 and the average first fall frost is October 26, giving a typical growing season of about 185 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 23
- Average first fall frost
- Oct 26
- Growing season
- 185 days
Safer after May 10 (1-in-10 risk)
Possible by Oct 12 (1-in-10 risk)
Last frost typically in 172 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 20 · May 3 · May 20 | Oct 4 · Oct 17 · Oct 28 | 165 days | 100% |
| Frost / freeze (32°F) | Apr 10 · Apr 23 · May 10 | Oct 12 · Oct 26 · Nov 6 | 185 days | 100% |
| Hard freeze (28°F) | Mar 28 · Apr 10 · Apr 25 | Oct 24 · Nov 3 · Nov 16 | 207 days | 100% |
Planting calendar for Saint Marys
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 23 – May 29 |
| Tomatoes | Transplant outdoors | May 9 – Jul 6 |
| Peppers | Start seeds indoors | Mar 23 – Apr 23 |
| Peppers | Transplant outdoors | May 23 – Jun 23 |
| Eggplant | Start seeds indoors | Apr 9 – May 8 |
| Eggplant | Transplant outdoors | May 23 – Jun 23 |
| Cucumbers | Sow outdoors | May 23 – Jul 16 |
| Summer squash | Sow outdoors | May 9 – Jun 23 |
| Winter squash & pumpkins | Sow outdoors | May 23 – Jun 23 |
| Snap beans | Sow outdoors | May 9 – Aug 8 |
| Sweet corn | Sow outdoors | May 9 – Jul 6 |
| Watermelon & cantaloupe | Sow outdoors | May 23 – Jun 23 |
| Okra | Sow outdoors | May 16 – Jun 8 |
| Peas | Sow outdoors (spring) | Mar 23 – May 8 |
| Potatoes | Plant outdoors (spring) | Mar 23 – May 23 |
| Onions | Start seeds indoors (spring) | Feb 9 – Mar 8 |
| Onions | Transplant outdoors (spring) | Apr 9 – May 8 |
| Broccoli | Start seeds indoors (spring) | Mar 5 – Apr 8 |
| Broccoli | Transplant outdoors (spring) | Apr 9 – May 8 |
| Broccoli | Start seeds indoors (fall) | Jun 26 – Jul 6 |
| Broccoli | Transplant outdoors (fall) | Jul 26 – Aug 6 |
| Cabbage | Start seeds indoors (spring) | Feb 23 – Mar 23 |
| Cabbage | Transplant outdoors (spring) | Mar 23 – Apr 23 |
| Cabbage | Start seeds indoors (fall) | Jun 16 – Jul 16 |
| Cabbage | Transplant outdoors (fall) | Jul 16 – Aug 16 |
| Leaf lettuce | Sow outdoors (spring) | Mar 23 – Jun 8 |
| Leaf lettuce | Sow outdoors (fall) | Jul 16 – Sep 1 |
| Spinach | Sow outdoors (spring) | Mar 16 – Apr 29 |
| Spinach | Sow outdoors (fall) | Aug 2 – Sep 6 |
| Radishes | Sow outdoors (spring) | Mar 23 – May 13 |
| Radishes | Sow outdoors (fall) | Jul 16 – Sep 16 |
| Kale | Sow outdoors (spring) | Apr 9 – Apr 29 |
| Kale | Sow outdoors (fall) | Jul 9 – Aug 16 |
| Carrots | Sow outdoors (spring) | Apr 23 – Jun 8 |
| Carrots | Sow outdoors (fall) | Jun 16 – Aug 1 |
| Garlic | Plant outdoors (fall) | Oct 16 – Nov 16 |
Where these dates come from
ZIP code 26170 is matched to the NOAA station Newport, OH, 4.1 km away, at 676 ft elevation (312 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Newport, OH (used) | 676 ft | Apr 23 | Oct 26 |
| Harrisville, WV | 823 ft | Apr 26 | Oct 17 |
| Marietta Wwtp, OH | 610 ft | Apr 18 | Oct 27 |
| Parkersburg Wood Co Ap, WV | 831 ft | Apr 23 | Oct 22 |
Frost dates near Saint Marys
- Newport, OH 45768 · last Apr 23, first Oct 26
- Belmont, WV 26134 · last Apr 23, first Oct 26
- Reno, OH 45773 · last Apr 23, first Oct 26
- Ellenboro, WV 26346 · last Apr 26, first Oct 17
- Friendly, WV 26146 · last May 1, first Oct 15
- Cairo, WV 26337 · last Apr 26, first Oct 17
- New Matamoras, OH 45767 · last May 1, first Oct 15
- Pennsboro, WV 26415 · last Apr 26, first Oct 17
Frequently asked questions
- When is the last frost in Saint Marys, WV?
- For ZIP code 26170, the average last spring frost (32°F) is April 23, based on NOAA 1991-2020 climate normals for the Newport, OH weather station. There is a 1-in-10 chance of a frost after May 10.
- When is the first frost in Saint Marys, WV?
- The average first fall frost (32°F) is October 26. There is a 1-in-10 chance of frost by October 12, so tender plants are at risk from that point on.
- How long is the growing season in 26170?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 185 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.