What planting zone is Mcallen, TX?

Mcallen 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 Mcallen?

In Mcallen, TX the warmest month is August (avg high 98.9°F) and the coldest is January (avg low 49.4°F). It averages about 18.7″ of precipitation a year.

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Mcallen, TX Planting Calendar & Frost Dates

USDA hardiness zone 10a · ZIP 78501 · elevation 31′ · NOAA & USDA data

Mcallen sits in USDA zone 10a and is effectively frost-free — you can grow something outdoors year-round. The warmest month is August (avg high 98.9°F) and the coolest is January (avg low 49.4°F). Time plantings by the hot vs. cool season rather than by frost: grow heat-loving crops through the warm months and cool-season greens in the mild winter. The wettest month is September (3.8″).

Hardiness zone

10a

min temp 30 to 35°F

Frost

Frost-free

grow year-round

Warmest month

August

avg high 98.9°F

Month-by-month typical weather in Mcallen

Average conditions from the NOAA/NCEI 1991–2020 U.S. Climate Normals at Mcallen, TX (1.8 mi away). Temperatures °F, precipitation & snow in inches.

Month	Avg high	Avg low	Mean	Precip (in)	Snow (in)
January	71.4	49.4	60.4	0.7	0
February	76.2	53.4	64.8	0.6	0
March	81.5	59.2	70.3	1	0
April	86.8	65.4	76.1	1.4	0
May	91.6	71.4	81.5	1.4	0
June	96.4	75.6	86	3.1	0
July	97.5	76.7	87.1	1.6	0
August	98.9	77	88	1.5	0
September	94	73.4	83.7	3.8	0
October	89.1	66.4	77.8	2	0
November	79.5	57.3	68.4	1.1	0
December	72.6	50.7	61.7	0.6	0.1

What to plant when in Mcallen

Mcallen is frost-free, so there's no last-frost date to time from. Grow cool-season crops (lettuce, peas, broccoli, carrots) in the cooler months and warm-season crops (tomatoes, peppers, beans, squash) through the warm season.

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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

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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 — Mcallen, TX, 1.8 mi (confidence: high). Monthly weather normals: Mcallen, TX, 1.8 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.