When is the last frost in Cedar Hill, TX?

The average last spring frost (50% probability of 32°F) in Cedar Hill is around March 20, based on NOAA/NCEI 1991–2020 normals at the Joe Pool Lake, TX station (3.9 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 Cedar Hill?

The average first fall frost in Cedar Hill, TX is around November 13, giving roughly a 236-day frost-free growing season.

What planting zone is Cedar Hill, TX?

Cedar Hill 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 Cedar Hill?

In Cedar Hill, TX the warmest month is August (avg high 96.8°F) and the coldest is January (avg low 32.6°F). It averages about 41.1″ of precipitation a year.

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Cedar Hill, TX Planting Calendar & Frost Dates

USDA hardiness zone 8b · ZIP 75104 · elevation 180′ · NOAA & USDA data

Cedar Hill is in USDA hardiness zone 8b (winters can dip to 15 to 20°F), with a growing season of about 236 days between the average last spring frost (March 20) and first fall frost (November 13). The warmest month is August (avg high 96.8°F); the coldest is January (avg low 32.6°F). It averages 41.1″ 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 20

avg (50% prob, 32°F)

First fall frost

November 13

avg (50% prob, 32°F)

Growing season

236 days

frost-free window

Warmest month

August

avg high 96.8°F

Month-by-month typical weather in Cedar Hill

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Joe Pool Lake, TX (3.9 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	58.3	32.6	45.5	2.7	–
February	61.9	37.5	49.7	3	–
March	69.2	45	57.1	3.8	–
April	76.8	52.8	64.8	3.7	–
May	83.9	60.8	72.3	4.7	–
June	91.6	68.5	80.1	4.2	–
July	95.5	72.7	84.1	2.3	–
August	96.8	72.5	84.6	2.4	–
September	90.4	66.2	78.3	3.1	–
October	79.6	54.3	67	5	–
November	67.6	44.6	56.1	3.2	–
December	60.2	35	47.6	3	–

What to plant when in Cedar Hill

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: February 6 · Transplant out: March 27
Peppers	warm	Start seeds indoors: January 23 · Transplant out: April 3
Cucumbers	warm	Direct sow: March 27
Zucchini / squash	warm	Direct sow: March 27
Bush beans	warm	Direct sow: March 27
Sweet corn	warm	Direct sow: March 27
Basil	warm	Transplant out: March 27
Peas	cool	Sow (spring): February 13 · Sow (fall): September 18
Spinach	cool	Sow (spring): February 6 · Sow (fall): September 18
Lettuce	cool	Sow (spring): February 20 · Sow (fall): September 18
Kale	cool	Transplant (spring): February 27 · Sow (fall): September 4
Broccoli	cool	Transplant (spring): March 6
Carrots	cool	Sow (spring): February 27 · Sow (fall): September 4
Onions	cool	Transplant (spring): February 20
Potatoes	cool	Plant seed potatoes: March 6
Radishes	cool	Sow (spring): February 20 · Sow (fall): October 2

Dates are computed from Cedar Hill'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.

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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 — Joe Pool Lake, TX, 3.9 mi (confidence: high). Monthly weather normals: Joe Pool Lake, TX, 3.9 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.