When is the last frost in The Colony, TX?

The average last spring frost (50% probability of 32°F) in The Colony is around March 7, based on NOAA/NCEI 1991–2020 normals at the Richardson, TX station (11 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 The Colony?

The average first fall frost in The Colony, TX is around November 21, giving roughly a 259-day frost-free growing season.

What planting zone is The Colony, TX?

The Colony 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 The Colony?

In The Colony, TX the warmest month is August (avg high 95.7°F) and the coldest is January (avg low 34.1°F). It averages about 38.9″ of precipitation a year.

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The Colony, TX Planting Calendar & Frost Dates

USDA hardiness zone 8b · ZIP 75056 · elevation 178′ · NOAA & USDA data

The Colony is in USDA hardiness zone 8b (winters can dip to 15 to 20°F), with a growing season of about 259 days between the average last spring frost (March 7) and first fall frost (November 21). The warmest month is August (avg high 95.7°F); the coldest is January (avg low 34.1°F). It averages 38.9″ 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 7

avg (50% prob, 32°F)

First fall frost

November 21

avg (50% prob, 32°F)

Growing season

259 days

frost-free window

Warmest month

August

avg high 95.7°F

Month-by-month typical weather in The Colony

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Grapevine Dam, TX (12.1 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	55.7	34.1	44.9	2.6	0
February	60.3	38.3	49.3	2.7	0.1
March	67.7	45.4	56.6	3.6	0
April	75.3	53.5	64.4	3.5	0
May	82.5	62.8	72.7	4.7	0
June	90.8	71.1	80.9	3.8	0
July	95.3	74.1	84.7	2.3	0
August	95.7	73.9	84.8	2.1	0
September	88.6	66.7	77.7	3.5	0
October	78.4	55.1	66.7	4.5	0
November	66.3	44.7	55.5	2.8	0
December	57.7	36.3	47	2.9	0

What to plant when in The Colony

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: January 24 · Transplant out: March 14
Peppers	warm	Start seeds indoors: January 10 · Transplant out: March 21
Cucumbers	warm	Direct sow: March 14
Zucchini / squash	warm	Direct sow: March 14
Bush beans	warm	Direct sow: March 14
Sweet corn	warm	Direct sow: March 14
Basil	warm	Transplant out: March 14
Peas	cool	Sow (spring): January 31 · Sow (fall): September 26
Spinach	cool	Sow (spring): January 24 · Sow (fall): September 26
Lettuce	cool	Sow (spring): February 7 · Sow (fall): September 26
Kale	cool	Transplant (spring): February 14 · Sow (fall): September 12
Broccoli	cool	Transplant (spring): February 21
Carrots	cool	Sow (spring): February 14 · Sow (fall): September 12
Onions	cool	Transplant (spring): February 7
Potatoes	cool	Plant seed potatoes: February 21
Radishes	cool	Sow (spring): February 7 · Sow (fall): October 10

Dates are computed from The Colony'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

Lewisville, TX Carrollton, TX Frisco, TX Coppell, TX Plano, TX Richardson, TX Flower Mound, TX Grapevine, 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 — Richardson, TX, 11 mi (confidence: medium). Monthly weather normals: Grapevine Dam, TX, 12.1 mi (confidence: medium). 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.