When is the last frost in Denton, TX?

The average last spring frost (50% probability of 32°F) in Denton is around March 13, based on NOAA/NCEI 1991–2020 normals at the Denton 2 Se, TX station (2.8 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 Denton?

The average first fall frost in Denton, TX is around November 20, giving roughly a 251-day frost-free growing season.

What planting zone is Denton, TX?

Denton is in USDA plant hardiness zone 8a (average annual extreme minimum temperature 10 to 15°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Denton?

In Denton, TX the warmest month is July (avg high 95.9°F) and the coldest is January (avg low 34.1°F). It averages about 38.4″ of precipitation a year.

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Denton, TX Planting Calendar & Frost Dates

USDA hardiness zone 8a · ZIP 76201 · elevation 192′ · NOAA & USDA data

Denton is in USDA hardiness zone 8a (winters can dip to 10 to 15°F), with a growing season of about 251 days between the average last spring frost (March 13) and first fall frost (November 20). The warmest month is July (avg high 95.9°F); the coldest is January (avg low 34.1°F). It averages 38.4″ 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 10 to 15°F

Last spring frost

March 13

avg (50% prob, 32°F)

First fall frost

November 20

avg (50% prob, 32°F)

Growing season

251 days

frost-free window

Warmest month

July

avg high 95.9°F

Month-by-month typical weather in Denton

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Denton 2 Se, TX (2.8 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	55.8	34.1	45	2.2	–
February	59.6	37.4	48.5	2.8	–
March	67.7	44.8	56.3	3.4	–
April	75.6	52.8	64.2	3.7	–
May	82.9	62.7	72.8	4.9	–
June	91.1	71.1	81.1	3.6	–
July	95.9	74.9	85.4	2.3	–
August	95.8	74.2	85	2.4	–
September	88.5	66.8	77.7	3	–
October	78.1	55.3	66.7	4.6	–
November	66.2	44.1	55.2	2.9	–
December	57.4	36.1	46.8	2.7	–

What to plant when in Denton

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 30 · Transplant out: March 20
Peppers	warm	Start seeds indoors: January 16 · Transplant out: March 27
Cucumbers	warm	Direct sow: March 20
Zucchini / squash	warm	Direct sow: March 20
Bush beans	warm	Direct sow: March 20
Sweet corn	warm	Direct sow: March 20
Basil	warm	Transplant out: March 20
Peas	cool	Sow (spring): February 6 · Sow (fall): September 25
Spinach	cool	Sow (spring): January 30 · Sow (fall): September 25
Lettuce	cool	Sow (spring): February 13 · Sow (fall): September 25
Kale	cool	Transplant (spring): February 20 · Sow (fall): September 11
Broccoli	cool	Transplant (spring): February 27
Carrots	cool	Sow (spring): February 20 · Sow (fall): September 11
Onions	cool	Transplant (spring): February 13
Potatoes	cool	Plant seed potatoes: February 27
Radishes	cool	Sow (spring): February 13 · Sow (fall): October 9

Dates are computed from Denton'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

Flower Mound, TX Lewisville, TX The Colony, TX Frisco, TX Grapevine, TX Coppell, TX Keller, TX Carrollton, 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 — Denton 2 Se, TX, 2.8 mi (confidence: high). Monthly weather normals: Denton 2 Se, TX, 2.8 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.