Frost dates for 29821Clarks Hill, SC
The average last spring frost in Clarks Hill is March 15 and the average first fall frost is November 18, giving a typical growing season of about 252 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 15
- Average first fall frost
- Nov 18
- Growing season
- 252 days
Safer after Apr 3 (1-in-10 risk)
Possible by Nov 3 (1-in-10 risk)
First frost typically in 15 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) | Mar 9 · Mar 29 · Apr 15 | Oct 26 · Nov 6 · Nov 22 | 225 days | 100% |
| Frost / freeze (32°F) | Feb 22 · Mar 15 · Apr 3 | Nov 3 · Nov 18 · Dec 12 | 252 days | 100% |
| Hard freeze (28°F) | Jan 30 · Feb 26 · Mar 19 | Nov 16 · Dec 8 · Jan 7 | 289 days | 100% |
Planting calendar for Clarks 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 | Feb 12 – Apr 20 |
| Tomatoes | Transplant outdoors | Mar 31 – Jul 29 |
| Peppers | Start seeds indoors | Feb 12 – Mar 15 |
| Peppers | Transplant outdoors | Apr 14 – May 15 |
| Eggplant | Start seeds indoors | Mar 1 – Mar 30 |
| Eggplant | Transplant outdoors | Apr 14 – May 15 |
| Cucumbers | Sow outdoors | Apr 14 – Aug 8 |
| Summer squash | Sow outdoors | Mar 31 – May 15 |
| Winter squash & pumpkins | Sow outdoors | Apr 14 – May 15 |
| Snap beans | Sow outdoors | Mar 31 – Aug 31 |
| Sweet corn | Sow outdoors | Mar 31 – Jul 29 |
| Watermelon & cantaloupe | Sow outdoors | Apr 14 – May 15 |
| Okra | Sow outdoors | Apr 7 – Apr 30 |
| Peas | Sow outdoors (spring) | Feb 12 – Mar 30 |
| Potatoes | Plant outdoors (spring) | Feb 12 – Apr 14 |
| Onions | Start seeds indoors (spring) | Jan 1 – Jan 28 |
| Onions | Transplant outdoors (spring) | Mar 1 – Mar 30 |
| Broccoli | Start seeds indoors (spring) | Jan 25 – Feb 28 |
| Broccoli | Transplant outdoors (spring) | Mar 1 – Mar 30 |
| Broccoli | Start seeds indoors (fall) | Jul 19 – Jul 29 |
| Broccoli | Transplant outdoors (fall) | Aug 18 – Aug 29 |
| Cabbage | Start seeds indoors (spring) | Jan 15 – Feb 12 |
| Cabbage | Transplant outdoors (spring) | Feb 12 – Mar 15 |
| Cabbage | Start seeds indoors (fall) | Jul 9 – Aug 8 |
| Cabbage | Transplant outdoors (fall) | Aug 8 – Sep 8 |
| Leaf lettuce | Sow outdoors (spring) | Feb 12 – Apr 30 |
| Leaf lettuce | Sow outdoors (fall) | Aug 8 – Sep 24 |
| Spinach | Sow outdoors (spring) | Feb 5 – Mar 21 |
| Spinach | Sow outdoors (fall) | Aug 25 – Sep 29 |
| Radishes | Sow outdoors (spring) | Feb 12 – Apr 4 |
| Radishes | Sow outdoors (fall) | Aug 8 – Oct 9 |
| Kale | Sow outdoors (spring) | Mar 1 – Mar 21 |
| Kale | Sow outdoors (fall) | Aug 1 – Sep 8 |
| Carrots | Sow outdoors (spring) | Mar 15 – Apr 30 |
| Carrots | Sow outdoors (fall) | Jul 9 – Aug 24 |
| Garlic | Plant outdoors (fall) | Nov 8 – Dec 9 |
Where these dates come from
ZIP code 29821 is matched to the NOAA station Clarks Hill 1 W, SC, 4 km away, at 400 ft elevation (82 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Clarks Hill 1 W, SC (used) | 400 ft | Mar 15 | Nov 18 |
| Appling 2 Nw, GA | 396 ft | Mar 27 | Nov 7 |
| Augusta Daniel Fld Ap, GA | 423 ft | Feb 27 | Dec 4 |
| Edgefield 2.2 Ene, SC | 607 ft | Mar 16 | Nov 13 |
Frost dates near Clarks Hill
- Modoc, SC 29838 · last Mar 15, first Nov 18
- Evans, GA 30809 · last Feb 27, first Dec 4
- Appling, GA 30802 · last Mar 27, first Nov 7
- Augusta, GA 30907 · last Feb 27, first Dec 4
- Parksville, SC 29844 · last Mar 15, first Nov 18
- North Augusta, SC 29860 · last Feb 27, first Dec 4
- Plum Branch, SC 29845 · last Mar 15, first Nov 18
- Grovetown, GA 30813 · last Feb 27, first Dec 4
Frequently asked questions
- When is the last frost in Clarks Hill, SC?
- For ZIP code 29821, the average last spring frost (32°F) is March 15, based on NOAA 1991-2020 climate normals for the Clarks Hill 1 W, SC weather station. There is a 1-in-10 chance of a frost after April 3.
- When is the first frost in Clarks Hill, SC?
- The average first fall frost (32°F) is November 18. There is a 1-in-10 chance of frost by November 3, so tender plants are at risk from that point on.
- How long is the growing season in 29821?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 252 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.