When is the last frost in Mobile, AL?

The average last spring frost (50% probability of 32°F) in Mobile is around February 21, based on NOAA/NCEI 1991–2020 normals at the Mobile Dwtn Ap, AL station (5.2 mi away). Half of years it falls outside that date, so wait 1–2 weeks past it before setting out frost-tender plants.

When is the first fall frost in Mobile?

The average first fall frost in Mobile, AL is around December 6, giving roughly a 292-day frost-free growing season.

What planting zone is Mobile, AL?

Mobile is in USDA plant hardiness zone 9a (average annual extreme minimum temperature 20 to 25°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Mobile?

In Mobile, AL the warmest month is August (avg high 91.9°F) and the coldest is January (avg low 42.5°F). It averages about 60.5″ of precipitation a year.

Home › Alabama › Mobile

Mobile, AL Planting Calendar & Frost Dates

USDA hardiness zone 9a · ZIP 36602 · elevation 8′ · NOAA & USDA data

Mobile is in USDA hardiness zone 9a (winters can dip to 20 to 25°F), with a growing season of about 292 days between the average last spring frost (February 21) and first fall frost (December 6). The warmest month is August (avg high 91.9°F); the coldest is January (avg low 42.5°F). It averages 60.5″ of precipitation a year. Start cool-season crops several weeks before the last frost; wait until after it for tomatoes, peppers and other tender crops.

Hardiness zone

min temp 20 to 25°F

Last spring frost

February 21

avg (50% prob, 32°F)

First fall frost

December 6

avg (50% prob, 32°F)

Growing season

292 days

frost-free window

Warmest month

August

avg high 91.9°F

Month-by-month typical weather in Mobile

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Mobile Dwtn Ap, AL (5.2 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	62.1	42.5	52.3	5.2	–
February	65.8	46.1	55.9	3.8	–
March	71.8	51.8	61.8	5.1	–
April	77.9	58.6	68.3	4.9	–
May	85	66.3	75.7	4.4	–
June	90	73.1	81.5	5.8	–
July	91.7	75.3	83.5	6.6	–
August	91.9	75.3	83.6	7.1	–
September	88.8	71.8	80.3	4.5	–
October	81.3	61	71.1	3.8	–
November	71.6	49.9	60.8	4.1	–
December	64.3	44.9	54.6	5.3	–

What to plant when in Mobile

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 10 · Transplant out: February 28
Peppers	warm	Start seeds indoors: December 27 · Transplant out: March 7
Cucumbers	warm	Direct sow: February 28
Zucchini / squash	warm	Direct sow: February 28
Bush beans	warm	Direct sow: February 28
Sweet corn	warm	Direct sow: February 28
Basil	warm	Transplant out: February 28
Peas	cool	Sow (spring): January 17 · Sow (fall): October 11
Spinach	cool	Sow (spring): January 10 · Sow (fall): October 11
Lettuce	cool	Sow (spring): January 24 · Sow (fall): October 11
Kale	cool	Transplant (spring): January 31 · Sow (fall): September 27
Broccoli	cool	Transplant (spring): February 7
Carrots	cool	Sow (spring): January 31 · Sow (fall): September 27
Onions	cool	Transplant (spring): January 24
Potatoes	cool	Plant seed potatoes: February 7
Radishes	cool	Sow (spring): January 24 · Sow (fall): October 25

Dates are computed from Mobile's average frost dates using standard cool-/warm-season timing. They're a starting point — a cold spring, a warm microclimate, or a fast-maturing variety can shift them by a week or two.

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Gear that helps you plant on time

Some links below are Amazon affiliate links (tag theboringthin-20). If you buy through them we may earn a small commission at no extra cost to you — it keeps this almanac free. We only list generic, genuinely-useful categories.

Soil thermometer →Know when the ground is warm enough to sow — the honest signal, not the calendar.Seed-starting trays + dome →Start tomatoes & peppers indoors on the schedule below.Seedling heat mat →Warms the soil for faster, more even germination indoors.Floating row cover / frost cloth →Buys you 4–8°F to beat an early or late frost.Raised garden bed kit →Warms and drains faster in spring than in-ground soil.Garden gloves →Basic kit for transplant day.

Nearby cities in Alabama

Montgomery, AL Dothan, AL Tuscaloosa, AL Auburn, AL Birmingham, AL Phenix City, AL Decatur, AL Madison, AL

Sources & method. Hardiness zone: 2023 USDA Plant Hardiness Zone Map (PRISM Climate Group, Oregon State University). Frost dates & growing season: NOAA/NCEI 1991–2020 U.S. Climate Normals, nearest station with published freeze normals — Mobile Dwtn Ap, AL, 5.2 mi (confidence: high). Monthly weather normals: Mobile Dwtn Ap, AL, 5.2 mi (confidence: high). ZIP centroid from U.S. Census 2023 ZCTA data. Frost dates are the 50%-probability date — half of years frost occurs outside the stated date. Nothing here is invented; where the nearest station is far, we say so. Last updated 2026-07-22.