Frost dates for 29178Whitmire, SC
The average last spring frost in Whitmire is April 6 and the average first fall frost is October 30, giving a typical growing season of about 207 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 6
- Average first fall frost
- Oct 30
- Growing season
- 207 days
Safer after Apr 21 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
Last frost typically in 154 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 3 · Apr 18 · May 4 | Oct 10 · Oct 22 · Nov 2 | 186 days | 100% |
| Frost / freeze (32°F) | Mar 21 · Apr 6 · Apr 21 | Oct 17 · Oct 30 · Nov 12 | 207 days | 100% |
| Hard freeze (28°F) | Mar 6 · Mar 26 · Apr 11 | Oct 26 · Nov 9 · Nov 29 | 230 days | 100% |
Planting calendar for Whitmire
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 6 – May 12 |
| Tomatoes | Transplant outdoors | Apr 22 – Jul 10 |
| Peppers | Start seeds indoors | Mar 6 – Apr 6 |
| Peppers | Transplant outdoors | May 6 – Jun 6 |
| Eggplant | Start seeds indoors | Mar 23 – Apr 21 |
| Eggplant | Transplant outdoors | May 6 – Jun 6 |
| Cucumbers | Sow outdoors | May 6 – Jul 20 |
| Summer squash | Sow outdoors | Apr 22 – Jun 6 |
| Winter squash & pumpkins | Sow outdoors | May 6 – Jun 6 |
| Snap beans | Sow outdoors | Apr 22 – Aug 12 |
| Sweet corn | Sow outdoors | Apr 22 – Jul 10 |
| Watermelon & cantaloupe | Sow outdoors | May 6 – Jun 6 |
| Okra | Sow outdoors | Apr 29 – May 22 |
| Peas | Sow outdoors (spring) | Mar 6 – Apr 21 |
| Potatoes | Plant outdoors (spring) | Mar 6 – May 6 |
| Onions | Start seeds indoors (spring) | Jan 23 – Feb 19 |
| Onions | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (spring) | Feb 16 – Mar 22 |
| Broccoli | Transplant outdoors (spring) | Mar 23 – Apr 21 |
| Broccoli | Start seeds indoors (fall) | Jun 30 – Jul 10 |
| Broccoli | Transplant outdoors (fall) | Jul 30 – Aug 10 |
| Cabbage | Start seeds indoors (spring) | Feb 6 – Mar 6 |
| Cabbage | Transplant outdoors (spring) | Mar 6 – Apr 6 |
| Cabbage | Start seeds indoors (fall) | Jun 20 – Jul 20 |
| Cabbage | Transplant outdoors (fall) | Jul 20 – Aug 20 |
| Leaf lettuce | Sow outdoors (spring) | Mar 6 – May 22 |
| Leaf lettuce | Sow outdoors (fall) | Jul 20 – Sep 5 |
| Spinach | Sow outdoors (spring) | Feb 27 – Apr 12 |
| Spinach | Sow outdoors (fall) | Aug 6 – Sep 10 |
| Radishes | Sow outdoors (spring) | Mar 6 – Apr 26 |
| Radishes | Sow outdoors (fall) | Jul 20 – Sep 20 |
| Kale | Sow outdoors (spring) | Mar 23 – Apr 12 |
| Kale | Sow outdoors (fall) | Jul 13 – Aug 20 |
| Carrots | Sow outdoors (spring) | Apr 6 – May 22 |
| Carrots | Sow outdoors (fall) | Jun 20 – Aug 5 |
| Garlic | Plant outdoors (fall) | Oct 20 – Nov 20 |
Where these dates come from
ZIP code 29178 is matched to the NOAA station Union 8 S, SC, 13.3 km away, at 480 ft elevation (93 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Union 8 S, SC (used) | 480 ft | Apr 6 | Oct 30 |
| Santuck, SC | 520 ft | Apr 4 | Nov 1 |
| Newberry, SC | 513 ft | Mar 31 | Nov 7 |
| Clinton, SC | 655 ft | Mar 29 | Nov 4 |
Frost dates near Whitmire
- Carlisle, SC 29031 · last Apr 4, first Nov 1
- Kinards, SC 29355 · last Mar 31, first Nov 7
- Joanna, SC 29351 · last Apr 1, first Nov 5
- Newberry, SC 29108 · last Mar 31, first Nov 7
- Blair, SC 29015 · last Apr 4, first Nov 1
- Clinton, SC 29325 · last Mar 29, first Nov 4
- Pomaria, SC 29126 · last Mar 31, first Nov 7
- Union, SC 29379 · last Apr 4, first Nov 1
Frequently asked questions
- When is the last frost in Whitmire, SC?
- For ZIP code 29178, the average last spring frost (32°F) is April 6, based on NOAA 1991-2020 climate normals for the Union 8 S, SC weather station. There is a 1-in-10 chance of a frost after April 21.
- When is the first frost in Whitmire, SC?
- 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 29178?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 207 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.