When is the last frost in Edinburg, TX?

The average last spring frost (50% probability of 32°F) in Edinburg is around January 21, based on NOAA/NCEI 1991–2020 normals at the Edinburg 17 Nne, TX station (6.7 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 Edinburg?

The average first fall frost in Edinburg, TX is around December 23, giving roughly a 338-day frost-free growing season.

What planting zone is Edinburg, TX?

Edinburg is in USDA plant hardiness zone 10a (average annual extreme minimum temperature 30 to 35°F), from the 2023 USDA Plant Hardiness Zone Map.

What is the weather like in Edinburg?

In Edinburg, TX the warmest month is August (avg high 98.2°F) and the coldest is January (avg low 48.7°F). It averages about 23.6″ of precipitation a year.

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Edinburg, TX Planting Calendar & Frost Dates

USDA hardiness zone 10a · ZIP 78542 · elevation 20′ · NOAA & USDA data

Edinburg is in USDA hardiness zone 10a (winters can dip to 30 to 35°F), with a growing season of about 338 days between the average last spring frost (January 21) and first fall frost (December 23). The warmest month is August (avg high 98.2°F); the coldest is January (avg low 48.7°F). It averages 23.6″ 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

10a

min temp 30 to 35°F

Last spring frost

January 21

avg (50% prob, 32°F)

First fall frost

December 23

avg (50% prob, 32°F)

Growing season

338 days

frost-free window

Warmest month

August

avg high 98.2°F

Month-by-month typical weather in Edinburg

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Edinburg 17 Nne, TX (6.7 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	71.7	48.7	60.2	1	–
February	76.4	53.3	64.8	1.3	–
March	81.3	58.6	69.9	0.9	–
April	87.3	64.2	75.8	1.4	–
May	92.5	70.6	81.5	2.5	–
June	95.5	74.2	84.8	3.4	–
July	97.5	75.3	86.4	2	–
August	98.2	75.5	86.9	1.9	–
September	93.6	71.7	82.6	4.7	–
October	88	64.4	76.2	2.5	–
November	79.6	56.2	67.9	1.2	–
December	72.6	50.3	61.4	1.1	–

What to plant when in Edinburg

Crop	Season	What to do & when
Tomatoes	warm	Start seeds indoors: December 10 · Transplant out: January 28
Peppers	warm	Start seeds indoors: November 26 · Transplant out: February 4
Cucumbers	warm	Direct sow: January 28
Zucchini / squash	warm	Direct sow: January 28
Bush beans	warm	Direct sow: January 28
Sweet corn	warm	Direct sow: January 28
Basil	warm	Transplant out: January 28
Peas	cool	Sow (spring): December 17 · Sow (fall): October 28
Spinach	cool	Sow (spring): December 10 · Sow (fall): October 28
Lettuce	cool	Sow (spring): December 24 · Sow (fall): October 28
Kale	cool	Transplant (spring): December 31 · Sow (fall): October 14
Broccoli	cool	Transplant (spring): January 7
Carrots	cool	Sow (spring): December 31 · Sow (fall): October 14
Onions	cool	Transplant (spring): December 24
Potatoes	cool	Plant seed potatoes: January 7
Radishes	cool	Sow (spring): December 24 · Sow (fall): November 11

Dates are computed from Edinburg'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 — Edinburg 17 Nne, TX, 6.7 mi (confidence: high). Monthly weather normals: Edinburg 17 Nne, TX, 6.7 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.