Frost dates for 29340Gaffney, SC
The average last spring frost in Gaffney is April 20 and the average first fall frost is October 24, giving a typical growing season of about 186 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 20
- Average first fall frost
- Oct 24
- Growing season
- 186 days
Safer after May 6 (1-in-10 risk)
Possible by Oct 11 (1-in-10 risk)
Last frost typically in 168 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 15 · May 1 · May 15 | Oct 4 · Oct 15 · Oct 29 | 168 days | 100% |
| Frost / freeze (32°F) | Apr 2 · Apr 20 · May 6 | Oct 11 · Oct 24 · Nov 5 | 186 days | 100% |
| Hard freeze (28°F) | Mar 20 · Apr 6 · Apr 24 | Oct 20 · Nov 1 · Nov 16 | 210 days | 100% |
Planting calendar for Gaffney
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 20 – May 26 |
| Tomatoes | Transplant outdoors | May 6 – Jul 4 |
| Peppers | Start seeds indoors | Mar 20 – Apr 20 |
| Peppers | Transplant outdoors | May 20 – Jun 20 |
| Eggplant | Start seeds indoors | Apr 6 – May 5 |
| Eggplant | Transplant outdoors | May 20 – Jun 20 |
| Cucumbers | Sow outdoors | May 20 – Jul 14 |
| Summer squash | Sow outdoors | May 6 – Jun 20 |
| Winter squash & pumpkins | Sow outdoors | May 20 – Jun 20 |
| Snap beans | Sow outdoors | May 6 – Aug 6 |
| Sweet corn | Sow outdoors | May 6 – Jul 4 |
| Watermelon & cantaloupe | Sow outdoors | May 20 – Jun 20 |
| Okra | Sow outdoors | May 13 – Jun 5 |
| Peas | Sow outdoors (spring) | Mar 20 – May 5 |
| Potatoes | Plant outdoors (spring) | Mar 20 – May 20 |
| Onions | Start seeds indoors (spring) | Feb 6 – Mar 5 |
| Onions | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (spring) | Mar 2 – Apr 5 |
| Broccoli | Transplant outdoors (spring) | Apr 6 – May 5 |
| Broccoli | Start seeds indoors (fall) | Jun 24 – Jul 4 |
| Broccoli | Transplant outdoors (fall) | Jul 24 – Aug 4 |
| Cabbage | Start seeds indoors (spring) | Feb 20 – Mar 20 |
| Cabbage | Transplant outdoors (spring) | Mar 20 – Apr 20 |
| Cabbage | Start seeds indoors (fall) | Jun 14 – Jul 14 |
| Cabbage | Transplant outdoors (fall) | Jul 14 – Aug 14 |
| Leaf lettuce | Sow outdoors (spring) | Mar 20 – Jun 5 |
| Leaf lettuce | Sow outdoors (fall) | Jul 14 – Aug 30 |
| Spinach | Sow outdoors (spring) | Mar 13 – Apr 26 |
| Spinach | Sow outdoors (fall) | Jul 31 – Sep 4 |
| Radishes | Sow outdoors (spring) | Mar 20 – May 10 |
| Radishes | Sow outdoors (fall) | Jul 14 – Sep 14 |
| Kale | Sow outdoors (spring) | Apr 6 – Apr 26 |
| Kale | Sow outdoors (fall) | Jul 7 – Aug 14 |
| Carrots | Sow outdoors (spring) | Apr 20 – Jun 5 |
| Carrots | Sow outdoors (fall) | Jun 14 – Jul 30 |
| Garlic | Plant outdoors (fall) | Oct 14 – Nov 14 |
Where these dates come from
ZIP code 29340 is matched to the NOAA station Ninety Nine Is, SC, 14.6 km away, at 500 ft elevation (307 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Ninety Nine Is, SC (used) | 500 ft | Apr 20 | Oct 24 |
| Shelby 2 Nw, NC | 820 ft | Apr 12 | Oct 25 |
| Chesnee 7 Wsw, SC | 748 ft | Apr 13 | Oct 26 |
| Spartanburg 3 Sse, SC | 610 ft | Apr 8 | Nov 1 |
Frost dates near Gaffney
- Gaffney, SC 29341 · last Apr 12, first Oct 25
- Blacksburg, SC 29702 · last Apr 20, first Oct 24
- Cowpens, SC 29330 · last Apr 13, first Oct 26
- Pacolet Mills, SC 29373 · last Apr 8, first Nov 1
- Clifton, SC 29324 · last Apr 8, first Nov 1
- Earl, NC 28038 · last Apr 12, first Oct 25
- Converse, SC 29329 · last Apr 8, first Nov 1
- Spartanburg, SC 29307 · last Apr 8, first Nov 1
Frequently asked questions
- When is the last frost in Gaffney, SC?
- For ZIP code 29340, the average last spring frost (32°F) is April 20, based on NOAA 1991-2020 climate normals for the Ninety Nine Is, SC weather station. There is a 1-in-10 chance of a frost after May 6.
- When is the first frost in Gaffney, SC?
- The average first fall frost (32°F) is October 24. There is a 1-in-10 chance of frost by October 11, so tender plants are at risk from that point on.
- How long is the growing season in 29340?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 186 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.