Frost dates for 39272Byram, MS
The average last spring frost in Byram is March 6 and the average first fall frost is November 19, giving a typical growing season of about 258 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 6
- Average first fall frost
- Nov 19
- Growing season
- 258 days
Safer after Mar 24 (1-in-10 risk)
Possible by Nov 4 (1-in-10 risk)
First frost typically in 16 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 2 · Mar 20 · Apr 7 | Oct 27 · Nov 9 · Nov 24 | 235 days | 100% |
| Frost / freeze (32°F) | Feb 15 · Mar 6 · Mar 24 | Nov 4 · Nov 19 · Dec 10 | 258 days | 100% |
| Hard freeze (28°F) | Jan 23 · Feb 19 · Mar 13 | Nov 11 · Dec 4 · Jan 3 | 290 days | 100% |
Planting calendar for Byram
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 3 – Apr 11 |
| Tomatoes | Transplant outdoors | Mar 22 – Jul 30 |
| Peppers | Start seeds indoors | Feb 3 – Mar 6 |
| Peppers | Transplant outdoors | Apr 5 – May 6 |
| Eggplant | Start seeds indoors | Feb 20 – Mar 21 |
| Eggplant | Transplant outdoors | Apr 5 – May 6 |
| Cucumbers | Sow outdoors | Apr 5 – Aug 9 |
| Summer squash | Sow outdoors | Mar 22 – May 6 |
| Winter squash & pumpkins | Sow outdoors | Apr 5 – May 6 |
| Snap beans | Sow outdoors | Mar 22 – Sep 1 |
| Sweet corn | Sow outdoors | Mar 22 – Jul 30 |
| Watermelon & cantaloupe | Sow outdoors | Apr 5 – May 6 |
| Okra | Sow outdoors | Mar 29 – Apr 21 |
| Peas | Sow outdoors (spring) | Feb 3 – Mar 21 |
| Potatoes | Plant outdoors (spring) | Feb 3 – Apr 5 |
| Onions | Start seeds indoors (spring) | Dec 23 – Jan 19 |
| Onions | Transplant outdoors (spring) | Feb 20 – Mar 21 |
| Broccoli | Start seeds indoors (spring) | Jan 16 – Feb 19 |
| Broccoli | Transplant outdoors (spring) | Feb 20 – Mar 21 |
| Broccoli | Start seeds indoors (fall) | Jul 20 – Jul 30 |
| Broccoli | Transplant outdoors (fall) | Aug 19 – Aug 30 |
| Cabbage | Start seeds indoors (spring) | Jan 6 – Feb 3 |
| Cabbage | Transplant outdoors (spring) | Feb 3 – Mar 6 |
| Cabbage | Start seeds indoors (fall) | Jul 10 – Aug 9 |
| Cabbage | Transplant outdoors (fall) | Aug 9 – Sep 9 |
| Leaf lettuce | Sow outdoors (spring) | Feb 3 – Apr 21 |
| Leaf lettuce | Sow outdoors (fall) | Aug 9 – Sep 25 |
| Spinach | Sow outdoors (spring) | Jan 27 – Mar 12 |
| Spinach | Sow outdoors (fall) | Aug 26 – Sep 30 |
| Radishes | Sow outdoors (spring) | Feb 3 – Mar 26 |
| Radishes | Sow outdoors (fall) | Aug 9 – Oct 10 |
| Kale | Sow outdoors (spring) | Feb 20 – Mar 12 |
| Kale | Sow outdoors (fall) | Aug 2 – Sep 9 |
| Carrots | Sow outdoors (spring) | Mar 6 – Apr 21 |
| Carrots | Sow outdoors (fall) | Jul 10 – Aug 25 |
| Garlic | Plant outdoors (fall) | Nov 9 – Dec 10 |
Where these dates come from
ZIP code 39272 is matched to the NOAA station Jackson Hawkins Fld, MS, 16.8 km away, at 342 ft elevation (40 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Jackson Hawkins Fld, MS (used) | 342 ft | Mar 6 | Nov 19 |
| Jackson Intl Ap, MS | 296 ft | Mar 14 | Nov 14 |
| Oakley Exp Stn, MS | 205 ft | Mar 16 | Nov 6 |
| Crystal Spgs Exp Stn, MS | 487 ft | Mar 11 | Nov 16 |
Frost dates near Byram
- Jackson, MS 39212 · last Mar 6, first Nov 19
- Terry, MS 39170 · last Mar 16, first Nov 6
- Richland, MS 39218 · last Mar 14, first Nov 14
- Florence, MS 39073 · last Mar 14, first Nov 14
- Pearl, MS 39288 · last Mar 14, first Nov 14
- Clinton, MS 39056 · last Mar 6, first Nov 19
- Whitfield, MS 39193 · last Mar 14, first Nov 14
- Raymond, MS 39154 · last Mar 16, first Nov 6
Frequently asked questions
- When is the last frost in Byram, MS?
- For ZIP code 39272, the average last spring frost (32°F) is March 6, based on NOAA 1991-2020 climate normals for the Jackson Hawkins Fld, MS weather station. There is a 1-in-10 chance of a frost after March 24.
- When is the first frost in Byram, MS?
- The average first fall frost (32°F) is November 19. There is a 1-in-10 chance of frost by November 4, so tender plants are at risk from that point on.
- How long is the growing season in 39272?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 258 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.