Frost dates for 30070Porterdale, GA
The average last spring frost in Porterdale is March 22 and the average first fall frost is November 14, giving a typical growing season of about 238 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 22
- Average first fall frost
- Nov 14
- Growing season
- 238 days
Safer after Apr 6 (1-in-10 risk)
Possible by Nov 1 (1-in-10 risk)
First frost typically in 11 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 16 · Apr 3 · Apr 20 | Oct 22 · Nov 2 · Nov 19 | 215 days | 100% |
| Frost / freeze (32°F) | Feb 26 · Mar 22 · Apr 6 | Nov 1 · Nov 14 · Dec 2 | 238 days | 100% |
| Hard freeze (28°F) | Feb 7 · Mar 6 · Mar 27 | Nov 9 · Nov 28 · Dec 22 | 269 days | 100% |
Planting calendar for Porterdale
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 19 – Apr 27 |
| Tomatoes | Transplant outdoors | Apr 7 – Jul 25 |
| Peppers | Start seeds indoors | Feb 19 – Mar 22 |
| Peppers | Transplant outdoors | Apr 21 – May 22 |
| Eggplant | Start seeds indoors | Mar 8 – Apr 6 |
| Eggplant | Transplant outdoors | Apr 21 – May 22 |
| Cucumbers | Sow outdoors | Apr 21 – Aug 4 |
| Summer squash | Sow outdoors | Apr 7 – May 22 |
| Winter squash & pumpkins | Sow outdoors | Apr 21 – May 22 |
| Snap beans | Sow outdoors | Apr 7 – Aug 27 |
| Sweet corn | Sow outdoors | Apr 7 – Jul 25 |
| Watermelon & cantaloupe | Sow outdoors | Apr 21 – May 22 |
| Okra | Sow outdoors | Apr 14 – May 7 |
| Peas | Sow outdoors (spring) | Feb 19 – Apr 6 |
| Potatoes | Plant outdoors (spring) | Feb 19 – Apr 21 |
| Onions | Start seeds indoors (spring) | Jan 8 – Feb 4 |
| Onions | Transplant outdoors (spring) | Mar 8 – Apr 6 |
| Broccoli | Start seeds indoors (spring) | Feb 1 – Mar 7 |
| Broccoli | Transplant outdoors (spring) | Mar 8 – Apr 6 |
| Broccoli | Start seeds indoors (fall) | Jul 15 – Jul 25 |
| Broccoli | Transplant outdoors (fall) | Aug 14 – Aug 25 |
| Cabbage | Start seeds indoors (spring) | Jan 22 – Feb 19 |
| Cabbage | Transplant outdoors (spring) | Feb 19 – Mar 22 |
| Cabbage | Start seeds indoors (fall) | Jul 5 – Aug 4 |
| Cabbage | Transplant outdoors (fall) | Aug 4 – Sep 4 |
| Leaf lettuce | Sow outdoors (spring) | Feb 19 – May 7 |
| Leaf lettuce | Sow outdoors (fall) | Aug 4 – Sep 20 |
| Spinach | Sow outdoors (spring) | Feb 12 – Mar 28 |
| Spinach | Sow outdoors (fall) | Aug 21 – Sep 25 |
| Radishes | Sow outdoors (spring) | Feb 19 – Apr 11 |
| Radishes | Sow outdoors (fall) | Aug 4 – Oct 5 |
| Kale | Sow outdoors (spring) | Mar 8 – Mar 28 |
| Kale | Sow outdoors (fall) | Jul 28 – Sep 4 |
| Carrots | Sow outdoors (spring) | Mar 22 – May 7 |
| Carrots | Sow outdoors (fall) | Jul 5 – Aug 20 |
| Garlic | Plant outdoors (fall) | Nov 4 – Dec 5 |
Where these dates come from
ZIP code 30070 is matched to the NOAA station Covington, GA, 5.6 km away, at 769 ft elevation (113 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Covington, GA (used) | 769 ft | Mar 22 | Nov 14 |
| Mcdonough 5 Ene, GA | 708 ft | Mar 31 | Nov 6 |
| Monticello, GA | 518 ft | Apr 4 | Nov 1 |
| Winder 4S, GA | 889 ft | Apr 3 | Nov 7 |
Frost dates near Porterdale
- Covington, GA 30015 · last Mar 22, first Nov 14
- Conyers, GA 30013 · last Mar 22, first Nov 14
- Oxford, GA 30054 · last Mar 22, first Nov 14
- Mcdonough, GA 30252 · last Mar 31, first Nov 6
- Mansfield, GA 30055 · last Apr 4, first Nov 1
- Jersey, GA 30018 · last Mar 22, first Nov 14
- Newborn, GA 30056 · last Mar 22, first Nov 14
- Social Circle, GA 30025 · last Mar 22, first Nov 14
Frequently asked questions
- When is the last frost in Porterdale, GA?
- For ZIP code 30070, the average last spring frost (32°F) is March 22, based on NOAA 1991-2020 climate normals for the Covington, GA weather station. There is a 1-in-10 chance of a frost after April 6.
- When is the first frost in Porterdale, GA?
- The average first fall frost (32°F) is November 14. There is a 1-in-10 chance of frost by November 1, so tender plants are at risk from that point on.
- How long is the growing season in 30070?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 238 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.