Fall in zone 9aPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 39531 (Biloxi, MS)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Biloxi, MS (2 miles away).
- Average last spring frostFeb 1250% chance of a 32°F freeze after this date
- Average first fall frostDec 1450% chance of a 32°F freeze by this date
- Growing season (frost-free)301 daysmedian, 32°F threshold
- USDA hardiness zone9a20 to 25°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
72°F 55°F or warmer
24-hour average · latest 65°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Tnc Fort Bayou, 14 mi away. Daily averages: Thu 76°, Fri 78°, Sat 72°.
4-inch depth
73°F 55°F or warmer
24-hour average · latest 69°F, as of Oct 18, 2:00 AM CDT
Measured at USDA NRCS SCAN station Tnc Fort Bayou, 14 mi away. Daily averages: Thu 76°, Fri 78°, Sat 74°.
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 39531 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 73°F at 4 inches. Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: Southeast (warm, humid). Timing only; always follow the product label.
- Centipedegrass (warm-season): Spring: Not before mid-May (NC State); after full green-up (about Mar 30 here, using green-up about 3–4 weeks after your average last frost); Summer: Optional mid-summer feeding, especially on sandy coastal soils. Avoid: Early-spring feeding, frequent feeding and liming unless a soil test calls for it (centipede decline).
Plant now
- Lettuce: fall sowing Oct 5–Nov 2
- Kale: fall transplant Sep 21–Oct 19
- Collards: fall transplant Sep 21–Oct 19
- Kohlrabi: fall sowing Oct 5–19
- Swiss chard: fall sowing Oct 5–19
- Beet: fall sowing Oct 5–19
- Turnip: fall sowing Oct 5–19
- Green onion / scallion: fall sowing Oct 5–19
- Strawberry (plants): fall transplant Oct 5–Nov 2
Coming up in the next 3 weeks
- Lettuce: fall transplant Oct 19–Nov 9
- Spinach: fall sowing Oct 19–Nov 9
- Bok choy / Asian greens: fall sowing Oct 19–Nov 2
- Arugula: fall sowing Oct 19–Nov 16
- Mustard greens: fall sowing Oct 19–Nov 2
- Radish: fall sowing Nov 2–16
- Garlic: fall sowing Nov 2–30
- Shallot: fall sowing Nov 2–30
- Cilantro: fall sowing Oct 19–Nov 2
- Dill: fall sowing Oct 19–Nov 2
Prune now
No frost-timed pruning windows are open this week.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Jan 18 |
| 50% (the "average" last frost) | Feb 12 |
| 10% (cautious: only 1 year in 10 freezes later) | Mar 11 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Nov 16 |
| 50% (the "average" first frost) | Dec 14 |
| 90% (late: most years have frozen by now) | Jan 11 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 1 | Nov 26 |
| 32°F (freeze) | Feb 12 | Dec 14 |
| 28°F (hard freeze) | Jan 27 | Jan 2 (next year) |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 39531
Dates count from your average last spring frost (Feb 12) and first fall frost (Dec 14). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Dec 18–Jan 1 | Feb 19–Mar 5 (transplant) | Aug 17–Sep 14 (transplant) |
| Pepper (sweet and hot) | Dec 4–18 | Feb 26–Mar 12 (transplant) | Aug 24–Sep 14 (transplant) |
| Eggplant | Dec 4–18 | Feb 26–Mar 12 (transplant) | Aug 24–Sep 14 (transplant) |
| Tomatillo | Dec 18–Jan 1 | Feb 19–Mar 5 (transplant) | – |
| Lettuce | Dec 18–Jan 1 | Jan 22–Feb 12 (transplant) Jan 15–Feb 26 (sow outdoors) | Oct 19–Nov 9 (transplant) Oct 5–Nov 2 (sowing) |
| Spinach | – | Jan 1–22 (sow outdoors) | Oct 19–Nov 9 (sowing) |
| Kale | Dec 18–Jan 1 | Jan 15–29 (transplant) Jan 15–29 (sow outdoors) | Sep 21–Oct 19 (transplant) Sep 7–Oct 5 (sowing) |
| Collards | Dec 18–Jan 1 | Jan 15–Feb 12 (transplant) Jan 15–Feb 12 (sow outdoors) | Sep 21–Oct 19 (transplant) Sep 7–Oct 5 (sowing) |
| Broccoli | Dec 4–18 | Jan 15–29 (transplant) | Sep 7–Oct 5 (transplant) |
| Cabbage | Dec 4–18 | Jan 15–29 (transplant) | Sep 7–Oct 5 (transplant) |
| Cauliflower | Dec 4–18 | Jan 29–Feb 12 (transplant) | Sep 7–Oct 5 (transplant) |
| Brussels sprouts | Nov 20–Dec 4 | Jan 15–29 (transplant) | Aug 24–Sep 14 (transplant) |
| Kohlrabi | Dec 18–Jan 1 | Jan 15–29 (transplant) Jan 15–29 (sow outdoors) | Oct 5–19 (sowing) |
| Bok choy / Asian greens | – | Jan 15–29 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Arugula | – | Jan 15–Feb 12 (sow outdoors) | Oct 19–Nov 16 (sowing) |
| Mustard greens | – | Jan 15–Feb 5 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Swiss chard | Jan 1–15 | Jan 29–Feb 19 (transplant) Jan 29–Feb 26 (sow outdoors) | Oct 5–19 (sowing) |
| Beet | – | Jan 15–Feb 12 (sow outdoors) | Oct 5–19 (sowing) |
| Carrot | – | Jan 22–Feb 19 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Radish | – | Jan 8–Feb 19 (sow outdoors) | Nov 2–16 (sowing) |
| Turnip | – | Jan 15–Feb 5 (sow outdoors) | Oct 5–19 (sowing) |
| Parsnip | – | Jan 22–Feb 12 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Dec 18–Jan 15 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Onion (bulbing) | Nov 20–Dec 4 | Jan 1–15 (transplant) | – |
| Green onion / scallion | – | Jan 1–29 (sow outdoors) | Oct 5–19 (sowing) |
| Leek | Nov 20–Dec 4 | Jan 15–29 (transplant) | – |
| Garlic | – | – | Nov 2–30 (sowing) |
| Shallot | – | Jan 1–15 (transplant) | Nov 2–30 (sowing) |
| Potato | – | Jan 15–29 (transplant) | Aug 24–Sep 7 (transplant) |
| Sweet potato | – | Mar 5–19 (transplant) | – |
| Sweet corn | – | Feb 19–Mar 5 (sow outdoors) | – |
| Bean, bush (snap) | – | Feb 19–Mar 5 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Bean, pole | – | Feb 19–Mar 5 (sow outdoors) | – |
| Lima bean | – | Feb 26–Mar 12 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Mar 5–26 (sow outdoors) | – |
| Cucumber | Jan 15–22 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Summer squash / zucchini | Jan 15–22 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | Sep 21–Oct 5 (sowing) |
| Winter squash | Jan 15–22 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | – |
| Pumpkin | – | Feb 19–Mar 5 (sow outdoors) | – |
| Watermelon | Jan 15–22 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Cantaloupe / muskmelon | Jan 15–22 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Okra | Jan 1–15 | Feb 26–Mar 12 (transplant) Feb 26–Mar 12 (sow outdoors) | – |
| Celery | Nov 20–Dec 4 | Feb 19–26 (transplant) | – |
| Basil | Jan 1–15 | Feb 19–Mar 5 (transplant) Feb 19–Mar 5 (sow outdoors) | – |
| Cilantro | – | Jan 29–Feb 26 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Parsley | Dec 4–18 | Jan 29–Feb 12 (transplant) Jan 22–Feb 12 (sow outdoors) | – |
| Dill | – | Feb 12–26 (sow outdoors) | Oct 19–Nov 2 (sowing) |
| Sunflower | – | Feb 12–26 (sow outdoors) | – |
| Asparagus (crowns) | – | Jan 15–29 (transplant) | – |
| Rhubarb (crowns) | – | Jan 15–29 (transplant) | – |
| Strawberry (plants) | – | Jan 15–29 (transplant) | Oct 5–Nov 2 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Plants that do well here
Mississippi has a university or garden plant program: Mississippi Medallion. Plant frost-tender annuals after February 12 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Biloxi, MS (NOAA GHCN-Daily ID USC00220792), elevation 10 ft, 2.2 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Gulfport - Biloxi AP, MS | 7 mi | Feb 23 | Dec 3 |
| Gulfport Naval Ctr, MS | 10 mi | Feb 18 | Dec 14 |
| Saucier EXP Forest, MS | 16 mi | Mar 7 | Nov 22 |
The average last-frost dates of these stations span 26 days, a rough guide to local variation. See data sources & methods.
Frost questions for 39531
When is the last frost in 39531?
The average (50% chance) last spring freeze of 32°F for ZIP 39531 is February 12. For a more cautious planting date, use March 11, when only 1 year in 10 still sees a later freeze.
When is the first frost in 39531?
The average first fall freeze is December 14. In 1 year in 10 it comes by November 16.
What hardiness zone is 39531?
ZIP 39531 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 39531 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
39534 Biloxi 39507 Gulfport 39530 Biloxi 39540 D'Iberville 39532 Biloxi 39501 Gulfport 39503 Gulfport 39564 Ocean Springs
Other ZIP codes in Harrison County
39501 39503 39507 39530 39532 39534 39540 39560 39571 39574 All Harrison County frost dates · Mississippi frost dates
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- Freeze alerts
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.