Frost dates for 37380South Pittsburg, TN
The average last spring frost in South Pittsburg is April 7 and the average first fall frost is October 31, giving a typical growing season of about 208 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 7
- Average first fall frost
- Oct 31
- Growing season
- 208 days
Safer after Apr 28 (1-in-10 risk)
Possible by Oct 18 (1-in-10 risk)
Last frost typically in 155 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 19 · May 6 | Oct 9 · Oct 22 · Nov 3 | 186 days | 100% |
| Frost / freeze (32°F) | Mar 18 · Apr 7 · Apr 28 | Oct 18 · Oct 31 · Nov 14 | 208 days | 100% |
| Hard freeze (28°F) | Mar 2 · Mar 24 · Apr 16 | Oct 27 · Nov 10 · Nov 30 | 233 days | 100% |
Planting calendar for South Pittsburg
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 7 – May 13 |
| Tomatoes | Transplant outdoors | Apr 23 – Jul 11 |
| Peppers | Start seeds indoors | Mar 7 – Apr 7 |
| Peppers | Transplant outdoors | May 7 – Jun 7 |
| Eggplant | Start seeds indoors | Mar 24 – Apr 22 |
| Eggplant | Transplant outdoors | May 7 – Jun 7 |
| Cucumbers | Sow outdoors | May 7 – Jul 21 |
| Summer squash | Sow outdoors | Apr 23 – Jun 7 |
| Winter squash & pumpkins | Sow outdoors | May 7 – Jun 7 |
| Snap beans | Sow outdoors | Apr 23 – Aug 13 |
| Sweet corn | Sow outdoors | Apr 23 – Jul 11 |
| Watermelon & cantaloupe | Sow outdoors | May 7 – Jun 7 |
| Okra | Sow outdoors | Apr 30 – May 23 |
| Peas | Sow outdoors (spring) | Mar 7 – Apr 22 |
| Potatoes | Plant outdoors (spring) | Mar 7 – May 7 |
| Onions | Start seeds indoors (spring) | Jan 24 – Feb 20 |
| Onions | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (spring) | Feb 17 – Mar 23 |
| Broccoli | Transplant outdoors (spring) | Mar 24 – Apr 22 |
| Broccoli | Start seeds indoors (fall) | Jul 1 – Jul 11 |
| Broccoli | Transplant outdoors (fall) | Jul 31 – Aug 11 |
| Cabbage | Start seeds indoors (spring) | Feb 7 – Mar 7 |
| Cabbage | Transplant outdoors (spring) | Mar 7 – Apr 7 |
| Cabbage | Start seeds indoors (fall) | Jun 21 – Jul 21 |
| Cabbage | Transplant outdoors (fall) | Jul 21 – Aug 21 |
| Leaf lettuce | Sow outdoors (spring) | Mar 7 – May 23 |
| Leaf lettuce | Sow outdoors (fall) | Jul 21 – Sep 6 |
| Spinach | Sow outdoors (spring) | Feb 28 – Apr 13 |
| Spinach | Sow outdoors (fall) | Aug 7 – Sep 11 |
| Radishes | Sow outdoors (spring) | Mar 7 – Apr 27 |
| Radishes | Sow outdoors (fall) | Jul 21 – Sep 21 |
| Kale | Sow outdoors (spring) | Mar 24 – Apr 13 |
| Kale | Sow outdoors (fall) | Jul 14 – Aug 21 |
| Carrots | Sow outdoors (spring) | Apr 7 – May 23 |
| Carrots | Sow outdoors (fall) | Jun 21 – Aug 6 |
| Garlic | Plant outdoors (fall) | Oct 21 – Nov 21 |
Where these dates come from
ZIP code 37380 is matched to the NOAA station Bridgeport 5 Nw, AL, 9 km away, at 664 ft elevation (363 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bridgeport 5 Nw, AL (used) | 664 ft | Apr 7 | Oct 31 |
| Monteagle, TN | 1,850 ft | Apr 10 | Oct 28 |
| Sewanee, TN | 1,928 ft | Apr 2 | Nov 4 |
| Winchester 5Se, TN | 941 ft | Apr 6 | Oct 29 |
Frost dates near South Pittsburg
- Bridgeport, AL 35740 · last Apr 7, first Oct 31
- Bryant, AL 35958 · last Apr 10, first Oct 28
- Jasper, TN 37347 · last Apr 7, first Oct 31
- Sequatchie, TN 37374 · last Apr 10, first Oct 28
- Sherwood, TN 37376 · last Apr 2, first Nov 4
- Guild, TN 37340 · last Mar 31, first Nov 6
- Stevenson, AL 35772 · last Apr 7, first Oct 31
- Whiteside, TN 37396 · last Mar 25, first Nov 9
Frequently asked questions
- When is the last frost in South Pittsburg, TN?
- For ZIP code 37380, the average last spring frost (32°F) is April 7, based on NOAA 1991-2020 climate normals for the Bridgeport 5 Nw, AL weather station. There is a 1-in-10 chance of a frost after April 28.
- When is the first frost in South Pittsburg, TN?
- The average first fall frost (32°F) is October 31. There is a 1-in-10 chance of frost by October 18, so tender plants are at risk from that point on.
- How long is the growing season in 37380?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 208 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.