Frost Dates for Hattiesburg, MS 39402

Last spring frost March 13 · First fall frost November 16 · 248 frost-free days · USDA Zone 8b

Frost probability for 39402

Frost10%50%90%
Spring (last frost)March 31March 13February 23
Fall (first frost)October 30November 16December 3

Dates come from NOAA 1971–2000 freeze probabilities at the nearest reporting station (41.3 km away); the 50% date is the median year.

Frost dates by ZIP code in Hattiesburg, MS

ZIPLast spring frost (50%)First fall frost (50%)Zone
39402March 13November 168b
39401March 12November 198b
39406March 20November 118b

Month by month in Hattiesburg

MonthWhat to do
JanuaryStart peppers and eggplant indoors 8–10 weeks before your last frost (around March 13). Start tomatoes about two weeks later, 6–8 weeks before last frost.
FebruaryStart herbs, basil, and squash indoors (4–6 weeks before frost). Direct sow peas, spinach, and lettuce if soil is workable.
MarchLast frost around March 13. Transplant cold-hardy crops (broccoli, kale, cabbage). Harden off tomato and pepper seedlings.
AprilFrost has passed. Transplant tomatoes, peppers, and basil outdoors. Direct sow beans, cucumbers, squash, and zucchini.
MaySuccession plant lettuce and greens. Keep beds weeded and watered consistently.
JuneHarvest regularly to encourage production. Monitor for pests and disease.
JulyMidsummer: harvest beans, zucchini, cucumbers. Start brassica seeds indoors for fall.
AugustDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
SeptemberDirect sow carrots and beets for fall harvest. Start fall broccoli and kale indoors.
OctoberFirst fall frost approaching (around November 16). Transplant fall brassicas. Sow spinach, arugula, and radishes.
NovemberFirst frost around November 16. Harvest tomatoes and peppers before frost. Cover cold-hardy crops with row covers to extend the season.
DecemberHarvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year.

What grows in a 248-day season

Frequently Asked Questions

What is the last frost date for Hattiesburg, MS (ZIP 39402)?

The median last spring frost date for Hattiesburg, MS (ZIP code 39402) is around March 13. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area.

What is the first fall frost date in Hattiesburg, MS?

The median first fall frost date for Hattiesburg, MS is around November 16. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses.

How long is the growing season in Hattiesburg, MS?

The frost-free growing season in Hattiesburg is about 248 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side.

What USDA hardiness zone is Hattiesburg, MS?

Based on frost date patterns, Hattiesburg falls approximately in 8b. USDA hardiness zones are determined by average annual minimum winter temperatures and guide both plant selection and planting timing for your location.

When should I start tomatoes indoors in Hattiesburg, MS?

Start tomato seeds indoors 6–8 weeks before your last frost date (around March 13). For Hattiesburg, that's roughly January 17 to January 31. Transplant outdoors 1–2 weeks after your last frost.

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