Frost dates for 29680Simpsonville, SC
The average last spring frost in Simpsonville is March 29 and the average first fall frost is November 5, giving a typical growing season of about 222 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 29
- Average first fall frost
- Nov 5
- Growing season
- 222 days
Safer after Apr 14 (1-in-10 risk)
Possible by Oct 24 (1-in-10 risk)
First frost typically in 2 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 26 · Apr 11 · Apr 30 | Oct 14 · Oct 26 · Nov 7 | 197 days | 100% |
| Frost / freeze (32°F) | Mar 10 · Mar 29 · Apr 14 | Oct 24 · Nov 5 · Nov 20 | 222 days | 100% |
| Hard freeze (28°F) | Feb 21 · Mar 15 · Mar 31 | Nov 2 · Nov 17 · Dec 6 | 250 days | 100% |
Planting calendar for Simpsonville
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 26 – May 4 |
| Tomatoes | Transplant outdoors | Apr 14 – Jul 16 |
| Peppers | Start seeds indoors | Feb 26 – Mar 29 |
| Peppers | Transplant outdoors | Apr 28 – May 29 |
| Eggplant | Start seeds indoors | Mar 15 – Apr 13 |
| Eggplant | Transplant outdoors | Apr 28 – May 29 |
| Cucumbers | Sow outdoors | Apr 28 – Jul 26 |
| Summer squash | Sow outdoors | Apr 14 – May 29 |
| Winter squash & pumpkins | Sow outdoors | Apr 28 – May 29 |
| Snap beans | Sow outdoors | Apr 14 – Aug 18 |
| Sweet corn | Sow outdoors | Apr 14 – Jul 16 |
| Watermelon & cantaloupe | Sow outdoors | Apr 28 – May 29 |
| Okra | Sow outdoors | Apr 21 – May 14 |
| Peas | Sow outdoors (spring) | Feb 26 – Apr 13 |
| Potatoes | Plant outdoors (spring) | Feb 26 – Apr 28 |
| Onions | Start seeds indoors (spring) | Jan 15 – Feb 11 |
| Onions | Transplant outdoors (spring) | Mar 15 – Apr 13 |
| Broccoli | Start seeds indoors (spring) | Feb 8 – Mar 14 |
| Broccoli | Transplant outdoors (spring) | Mar 15 – Apr 13 |
| Broccoli | Start seeds indoors (fall) | Jul 6 – Jul 16 |
| Broccoli | Transplant outdoors (fall) | Aug 5 – Aug 16 |
| Cabbage | Start seeds indoors (spring) | Jan 29 – Feb 26 |
| Cabbage | Transplant outdoors (spring) | Feb 26 – Mar 29 |
| Cabbage | Start seeds indoors (fall) | Jun 26 – Jul 26 |
| Cabbage | Transplant outdoors (fall) | Jul 26 – Aug 26 |
| Leaf lettuce | Sow outdoors (spring) | Feb 26 – May 14 |
| Leaf lettuce | Sow outdoors (fall) | Jul 26 – Sep 11 |
| Spinach | Sow outdoors (spring) | Feb 19 – Apr 4 |
| Spinach | Sow outdoors (fall) | Aug 12 – Sep 16 |
| Radishes | Sow outdoors (spring) | Feb 26 – Apr 18 |
| Radishes | Sow outdoors (fall) | Jul 26 – Sep 26 |
| Kale | Sow outdoors (spring) | Mar 15 – Apr 4 |
| Kale | Sow outdoors (fall) | Jul 19 – Aug 26 |
| Carrots | Sow outdoors (spring) | Mar 29 – May 14 |
| Carrots | Sow outdoors (fall) | Jun 26 – Aug 11 |
| Garlic | Plant outdoors (fall) | Oct 26 – Nov 26 |
Where these dates come from
ZIP code 29680 is matched to the NOAA station Fountain Inn 2 Sw, SC, 6.2 km away, at 830 ft elevation (3 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Fountain Inn 2 Sw, SC (used) | 830 ft | Mar 29 | Nov 5 |
| Greenville, SC | 960 ft | Mar 28 | Nov 7 |
| W Pelzer, SC | 705 ft | Apr 1 | Nov 4 |
| Greenville Dwtn Ap, SC | 1,048 ft | Mar 16 | Nov 20 |
Frost dates near Simpsonville
- Fountain Inn, SC 29644 · last Mar 29, first Nov 5
- Simpsonville, SC 29681 · last Mar 28, first Nov 7
- Mauldin, SC 29662 · last Mar 28, first Nov 7
- Conestee, SC 29636 · last Mar 28, first Nov 7
- Greenville, SC 29605 · last Mar 28, first Nov 7
- Piedmont, SC 29673 · last Apr 1, first Nov 4
- Pelzer, SC 29669 · last Apr 1, first Nov 4
- Gray Court, SC 29645 · last Apr 1, first Nov 5
Frequently asked questions
- When is the last frost in Simpsonville, SC?
- For ZIP code 29680, the average last spring frost (32°F) is March 29, based on NOAA 1991-2020 climate normals for the Fountain Inn 2 Sw, SC weather station. There is a 1-in-10 chance of a frost after April 14.
- When is the first frost in Simpsonville, SC?
- The average first fall frost (32°F) is November 5. There is a 1-in-10 chance of frost by October 24, so tender plants are at risk from that point on.
- How long is the growing season in 29680?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 222 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.