When is the last frost in Mansfield, TX?

The average last spring frost (50% probability of 32°F) in Mansfield is around March 9, based on NOAA/NCEI 1991–2020 normals at the Arlington Muni Ap, TX station (7.1 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 Mansfield?

The average first fall frost in Mansfield, TX is around November 21, giving roughly a 256-day frost-free growing season.

What planting zone is Mansfield, TX?

Mansfield is in USDA plant hardiness zone 8b (average annual extreme minimum temperature 15 to 20°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Mansfield?

In Mansfield, TX the warmest month is August (avg high 96.1°F) and the coldest is January (avg low 36.6°F). It averages about 36.2″ of precipitation a year.

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Mansfield, TX Planting Calendar & Frost Dates

USDA hardiness zone 8b · ZIP 76063 · elevation 192′ · NOAA & USDA data

Mansfield is in USDA hardiness zone 8b (winters can dip to 15 to 20°F), with a growing season of about 256 days between the average last spring frost (March 9) and first fall frost (November 21). The warmest month is August (avg high 96.1°F); the coldest is January (avg low 36.6°F). It averages 36.2″ 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 15 to 20°F

Last spring frost

March 9

avg (50% prob, 32°F)

First fall frost

November 21

avg (50% prob, 32°F)

Growing season

256 days

frost-free window

Warmest month

August

avg high 96.1°F

Month-by-month typical weather in Mansfield

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Arlington Muni Ap, TX (7.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	57.9	36.6	47.3	2.3	–
February	61.9	40.3	51.1	2.6	–
March	69.6	48	58.8	3.4	–
April	76.9	55	65.9	3.1	–
May	84	64	74	4.3	–
June	91.6	72.2	81.9	3.5	–
July	95.9	75	85.4	1.7	–
August	96.1	74.8	85.5	1.7	–
September	89.3	67.8	78.5	3.3	–
October	79.1	56.5	67.8	4.7	–
November	67.3	46.3	56.8	2.6	–
December	59.1	38.6	48.8	2.8	–

What to plant when in Mansfield

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 26 · Transplant out: March 16
Peppers	warm	Start seeds indoors: January 12 · Transplant out: March 23
Cucumbers	warm	Direct sow: March 16
Zucchini / squash	warm	Direct sow: March 16
Bush beans	warm	Direct sow: March 16
Sweet corn	warm	Direct sow: March 16
Basil	warm	Transplant out: March 16
Peas	cool	Sow (spring): February 2 · Sow (fall): September 26
Spinach	cool	Sow (spring): January 26 · Sow (fall): September 26
Lettuce	cool	Sow (spring): February 9 · Sow (fall): September 26
Kale	cool	Transplant (spring): February 16 · Sow (fall): September 12
Broccoli	cool	Transplant (spring): February 23
Carrots	cool	Sow (spring): February 16 · Sow (fall): September 12
Onions	cool	Transplant (spring): February 9
Potatoes	cool	Plant seed potatoes: February 23
Radishes	cool	Sow (spring): February 9 · Sow (fall): October 10

Dates are computed from Mansfield'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 Texas

Arlington, TX Burleson, TX Cedar Hill, TX Duncanville, TX Grand Prairie, TX Desoto, TX Fort Worth, TX Hurst, TX

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 — Arlington Muni Ap, TX, 7.1 mi (confidence: high). Monthly weather normals: Arlington Muni Ap, TX, 7.1 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.