Frost dates for 39666Summit, MS
The average last spring frost in Summit is March 11 and the average first fall frost is November 18, giving a typical growing season of about 253 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 11
- Average first fall frost
- Nov 18
- Growing season
- 253 days
Safer after Apr 2 (1-in-10 risk)
Possible by Nov 1 (1-in-10 risk)
First frost typically in 15 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 8 · Mar 28 · Apr 17 | Oct 24 · Nov 7 · Nov 25 | 225 days | 100% |
| Frost / freeze (32°F) | Feb 17 · Mar 11 · Apr 2 | Nov 1 · Nov 18 · Dec 7 | 253 days | 100% |
| Hard freeze (28°F) | Jan 27 · Feb 25 · Mar 18 | Nov 9 · Dec 1 · Jan 1 | 283 days | 100% |
Planting calendar for Summit
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 8 – Apr 16 |
| Tomatoes | Transplant outdoors | Mar 27 – Jul 29 |
| Peppers | Start seeds indoors | Feb 8 – Mar 11 |
| Peppers | Transplant outdoors | Apr 10 – May 11 |
| Eggplant | Start seeds indoors | Feb 25 – Mar 26 |
| Eggplant | Transplant outdoors | Apr 10 – May 11 |
| Cucumbers | Sow outdoors | Apr 10 – Aug 8 |
| Summer squash | Sow outdoors | Mar 27 – May 11 |
| Winter squash & pumpkins | Sow outdoors | Apr 10 – May 11 |
| Snap beans | Sow outdoors | Mar 27 – Aug 31 |
| Sweet corn | Sow outdoors | Mar 27 – Jul 29 |
| Watermelon & cantaloupe | Sow outdoors | Apr 10 – May 11 |
| Okra | Sow outdoors | Apr 3 – Apr 26 |
| Peas | Sow outdoors (spring) | Feb 8 – Mar 26 |
| Potatoes | Plant outdoors (spring) | Feb 8 – Apr 10 |
| Onions | Start seeds indoors (spring) | Dec 28 – Jan 24 |
| Onions | Transplant outdoors (spring) | Feb 25 – Mar 26 |
| Broccoli | Start seeds indoors (spring) | Jan 21 – Feb 24 |
| Broccoli | Transplant outdoors (spring) | Feb 25 – Mar 26 |
| Broccoli | Start seeds indoors (fall) | Jul 19 – Jul 29 |
| Broccoli | Transplant outdoors (fall) | Aug 18 – Aug 29 |
| Cabbage | Start seeds indoors (spring) | Jan 11 – Feb 8 |
| Cabbage | Transplant outdoors (spring) | Feb 8 – Mar 11 |
| Cabbage | Start seeds indoors (fall) | Jul 9 – Aug 8 |
| Cabbage | Transplant outdoors (fall) | Aug 8 – Sep 8 |
| Leaf lettuce | Sow outdoors (spring) | Feb 8 – Apr 26 |
| Leaf lettuce | Sow outdoors (fall) | Aug 8 – Sep 24 |
| Spinach | Sow outdoors (spring) | Feb 1 – Mar 17 |
| Spinach | Sow outdoors (fall) | Aug 25 – Sep 29 |
| Radishes | Sow outdoors (spring) | Feb 8 – Mar 31 |
| Radishes | Sow outdoors (fall) | Aug 8 – Oct 9 |
| Kale | Sow outdoors (spring) | Feb 25 – Mar 17 |
| Kale | Sow outdoors (fall) | Aug 1 – Sep 8 |
| Carrots | Sow outdoors (spring) | Mar 11 – Apr 26 |
| Carrots | Sow outdoors (fall) | Jul 9 – Aug 24 |
| Garlic | Plant outdoors (fall) | Nov 8 – Dec 9 |
Where these dates come from
ZIP code 39666 is matched to the NOAA station Mccomb/Pike Co/John E Lewis Ap, MS, 12.8 km away, at 413 ft elevation (3 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mccomb/Pike Co/John E Lewis Ap, MS (used) | 413 ft | Mar 11 | Nov 18 |
| Brookhaven City, MS | 435 ft | Mar 17 | Nov 12 |
| Liberty, MS | 328 ft | Mar 25 | Nov 8 |
| Meadville, MS | 345 ft | Mar 15 | Nov 12 |
Frost dates near Summit
- Mccomb, MS 39649 · last Mar 11, first Nov 18
- Fernwood, MS 39635 · last Mar 11, first Nov 18
- Bogue Chitto, MS 39629 · last Mar 17, first Nov 12
- Ruth, MS 39662 · last Mar 17, first Nov 12
- Magnolia, MS 39652 · last Mar 11, first Nov 18
- Chatawa, MS 39632 · last Mar 11, first Nov 18
- Smithdale, MS 39664 · last Mar 17, first Nov 12
- Brookhaven, MS 39602 · last Mar 17, first Nov 12
Frequently asked questions
- When is the last frost in Summit, MS?
- For ZIP code 39666, the average last spring frost (32°F) is March 11, based on NOAA 1991-2020 climate normals for the Mccomb/Pike Co/John E Lewis Ap, MS weather station. There is a 1-in-10 chance of a frost after April 2.
- When is the first frost in Summit, MS?
- The average first fall frost (32°F) is November 18. 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 39666?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 253 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.