San Juan, TX planting zone & frost dates

San Juan is in USDA hardiness zone 10a. Frost is rare here: in most years temperatures do not drop to 32°F.

USDA hardiness zone10aavg. extreme winter low 30°F to 35°F

FrostRarein most years the nearest weather station records no 32°F freeze

Useful for zone 10a gardens

Drip irrigation kit — saves water in long, hot seasons
Shade cloth — protects plants from midday sun
Soil moisture meter
Plants for zone 10

As an Amazon Associate, FrostZoneMap earns from qualifying purchases, at no extra cost to you.

Hardiness zone by ZIP code in San Juan

78589 zone 10a

Nearby cities

Pharr zone 10a
Alamo zone 10a
McAllen zone 10a
Donna zone 10a
Edinburg zone 10a
Hidalgo zone 10a
Weslaco zone 10a
Mission zone 10a

All cities in Texas → · Other zone 10a cities →

Questions

What growing zone is San Juan, TX?

San Juan is in USDA Plant Hardiness Zone 10a (average extreme winter low 30°F to 35°F), according to the USDA 2023 map.

Frost dates: NOAA U.S. Climate Normals 1991–2020, station Mcallen, TX (USC00415701), 9.6 km (6.0 mi) from the city center, elevation 30 m, based on 27 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.