Frost dates for 40829Grays Knob, KY
The average last spring frost in Grays Knob is April 15 and the average first fall frost is October 30, giving a typical growing season of about 197 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 15
- Average first fall frost
- Oct 30
- Growing season
- 197 days
Safer after May 1 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
Last frost typically in 163 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 13 · Apr 26 · May 11 | Oct 8 · Oct 20 · Nov 1 | 176 days | 100% |
| Frost / freeze (32°F) | Mar 31 · Apr 15 · May 1 | Oct 17 · Oct 30 · Nov 10 | 197 days | 100% |
| Hard freeze (28°F) | Mar 13 · Apr 1 · Apr 17 | Oct 25 · Nov 6 · Nov 21 | 221 days | 100% |
Planting calendar for Grays Knob
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 15 – May 21 |
| Tomatoes | Transplant outdoors | May 1 – Jul 10 |
| Peppers | Start seeds indoors | Mar 15 – Apr 15 |
| Peppers | Transplant outdoors | May 15 – Jun 15 |
| Eggplant | Start seeds indoors | Apr 1 – Apr 30 |
| Eggplant | Transplant outdoors | May 15 – Jun 15 |
| Cucumbers | Sow outdoors | May 15 – Jul 20 |
| Summer squash | Sow outdoors | May 1 – Jun 15 |
| Winter squash & pumpkins | Sow outdoors | May 15 – Jun 15 |
| Snap beans | Sow outdoors | May 1 – Aug 12 |
| Sweet corn | Sow outdoors | May 1 – Jul 10 |
| Watermelon & cantaloupe | Sow outdoors | May 15 – Jun 15 |
| Okra | Sow outdoors | May 8 – May 31 |
| Peas | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Potatoes | Plant outdoors (spring) | Mar 15 – May 15 |
| Onions | Start seeds indoors (spring) | Feb 1 – Feb 28 |
| Onions | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (spring) | Feb 25 – Mar 31 |
| Broccoli | Transplant outdoors (spring) | Apr 1 – Apr 30 |
| Broccoli | Start seeds indoors (fall) | Jun 30 – Jul 10 |
| Broccoli | Transplant outdoors (fall) | Jul 30 – Aug 10 |
| Cabbage | Start seeds indoors (spring) | Feb 15 – Mar 15 |
| Cabbage | Transplant outdoors (spring) | Mar 15 – Apr 15 |
| Cabbage | Start seeds indoors (fall) | Jun 20 – Jul 20 |
| Cabbage | Transplant outdoors (fall) | Jul 20 – Aug 20 |
| Leaf lettuce | Sow outdoors (spring) | Mar 15 – May 31 |
| Leaf lettuce | Sow outdoors (fall) | Jul 20 – Sep 5 |
| Spinach | Sow outdoors (spring) | Mar 8 – Apr 21 |
| Spinach | Sow outdoors (fall) | Aug 6 – Sep 10 |
| Radishes | Sow outdoors (spring) | Mar 15 – May 5 |
| Radishes | Sow outdoors (fall) | Jul 20 – Sep 20 |
| Kale | Sow outdoors (spring) | Apr 1 – Apr 21 |
| Kale | Sow outdoors (fall) | Jul 13 – Aug 20 |
| Carrots | Sow outdoors (spring) | Apr 15 – May 31 |
| Carrots | Sow outdoors (fall) | Jun 20 – Aug 5 |
| Garlic | Plant outdoors (fall) | Oct 20 – Nov 20 |
Where these dates come from
ZIP code 40829 is matched to the NOAA station Baxter, KY, 9 km away, at 1,164 ft elevation (125 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Baxter, KY (used) | 1,164 ft | Apr 15 | Oct 30 |
| Pennington Gap, VA | 1,360 ft | Apr 22 | Oct 20 |
| Skyline 1 Se, KY | 1,083 ft | Apr 18 | Oct 28 |
| Big Stone Gap, VA | 1,466 ft | Apr 20 | Oct 23 |
Frost dates near Grays Knob
- Cawood, KY 40815 · last Apr 15, first Oct 30
- Coalgood, KY 40818 · last Apr 15, first Oct 30
- Evarts, KY 40828 · last Apr 15, first Oct 30
- Mary Alice, KY 40964 · last Apr 15, first Oct 30
- Gulston, KY 40830 · last Apr 15, first Oct 30
- Ben Hur, VA 24218 · last Apr 15, first Oct 30
- Ages Brookside, KY 40801 · last Apr 15, first Oct 30
- Cranks, KY 40820 · last Apr 15, first Oct 30
Frequently asked questions
- When is the last frost in Grays Knob, KY?
- For ZIP code 40829, the average last spring frost (32°F) is April 15, based on NOAA 1991-2020 climate normals for the Baxter, KY weather station. There is a 1-in-10 chance of a frost after May 1.
- When is the first frost in Grays Knob, KY?
- The average first fall frost (32°F) is October 30. There is a 1-in-10 chance of frost by October 17, so tender plants are at risk from that point on.
- How long is the growing season in 40829?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 197 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.