When is the last frost in Jacksonville, FL?

The average last spring frost (50% probability of 32°F) in Jacksonville is around February 28, based on NOAA/NCEI 1991–2020 normals at the Jackson Whitehouse Nolf, FL station (6.9 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 Jacksonville?

The average first fall frost in Jacksonville, FL is around December 3, giving roughly a 280-day frost-free growing season.

What planting zone is Jacksonville, FL?

Jacksonville 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 Jacksonville?

In Jacksonville, FL the warmest month is July (avg high 91.8°F) and the coldest is January (avg low 47.2°F). It averages about 47.6″ of precipitation a year.

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Jacksonville, FL Planting Calendar & Frost Dates

USDA hardiness zone 9a · ZIP 32099 · elevation 6′ · NOAA & USDA data

Jacksonville is in USDA hardiness zone 9a (winters can dip to 20 to 25°F), with a growing season of about 280 days between the average last spring frost (February 28) and first fall frost (December 3). The warmest month is July (avg high 91.8°F); the coldest is January (avg low 47.2°F). It averages 47.6″ 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 28

avg (50% prob, 32°F)

First fall frost

December 3

avg (50% prob, 32°F)

Growing season

280 days

frost-free window

Warmest month

July

avg high 91.8°F

Month-by-month typical weather in Jacksonville

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Jacksonville Nas, FL (9.4 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)
January	65.5	47.2	56.3	2.9
February	68.9	50.2	59.5	2.3
March	74.3	55	64.7	3.1
April	80.5	61.1	70.8	2.4
May	86.2	68.9	77.5	3.2
June	90.1	73.9	82	7.3
July	91.8	76	83.9	6
August	91.1	76.3	83.7	6.3
September	87.8	73.9	80.9	6.1
October	81.6	66	73.8	3.6
November	73.3	56.1	64.7	2
December	67.5	50.4	58.9	2.5

What to plant when in Jacksonville

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 17 · Transplant out: March 7
Peppers	warm	Start seeds indoors: January 3 · Transplant out: March 14
Cucumbers	warm	Direct sow: March 7
Zucchini / squash	warm	Direct sow: March 7
Bush beans	warm	Direct sow: March 7
Sweet corn	warm	Direct sow: March 7
Basil	warm	Transplant out: March 7
Peas	cool	Sow (spring): January 24 · Sow (fall): October 8
Spinach	cool	Sow (spring): January 17 · Sow (fall): October 8
Lettuce	cool	Sow (spring): January 31 · Sow (fall): October 8
Kale	cool	Transplant (spring): February 7 · Sow (fall): September 24
Broccoli	cool	Transplant (spring): February 14
Carrots	cool	Sow (spring): February 7 · Sow (fall): September 24
Onions	cool	Transplant (spring): January 31
Potatoes	cool	Plant seed potatoes: February 14
Radishes	cool	Sow (spring): January 31 · Sow (fall): October 22

Dates are computed from Jacksonville'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 Florida

Gainesville, FL Palm Coast, FL Ocala, FL Ormond Beach, FL Daytona Beach, FL Port Orange, FL Deltona, FL Sanford, FL

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 — Jackson Whitehouse Nolf, FL, 6.9 mi (confidence: high). Monthly weather normals: Jacksonville Nas, FL, 9.4 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.