Frost Dates for Rio Grande City, TX

Elevation: 52 m

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. January 31
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 17

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost February 15
First Fall Frost December 4

Hard Freeze (28°F)

Last Spring Hard Freeze January 12
First Fall Hard Freeze December 29
26.38°N, 98.81°W © OpenStreetMap

Growing Season

321 Days January 31 to December 17

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 9b

Avg. annual minimum: 25 to 30°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BSh Hot Semi-Arid (Steppe)

Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January71°58°45°
February76°63°50°
March82°69°56°
April89°76°63°
May94°82°70°
June98°86°74°
July99°87°75°
August99°87°75°
September94°82°71°
October88°76°63°
November79°67°54°
December72°59°47°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January1.8
February1.6
March3.0
April4.0
May7.6
June7.5
July5.0
August5.0
September7.1
October4.6
November2.6
December1.9

Sunrise / Sunset

Daylight Central Time (CT) Longest: 13h 39m · Shortest: 10h 21m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Central Time (CT))
Month Sunrise Sunset Daylight
January7:29 AM6:00 PM10h 31m
February7:17 AM6:23 PM11h 06m
March7:50 AM7:39 PM11h 49m
April7:17 AM7:54 PM12h 38m
May6:53 AM8:10 PM13h 18m
June6:46 AM8:25 PM13h 39m
July6:56 AM8:26 PM13h 30m
August7:11 AM8:07 PM12h 56m
September7:25 AM7:34 PM12h 09m
October7:40 AM7:01 PM11h 22m
November7:00 AM5:41 PM10h 41m
December7:20 AM5:42 PM10h 21m

Nearby Stations

Falcon Dam, TX January 9 - January 1 La Joya, TX January 23 - December 28 Mcallen, TXJanuary 9 - January 1 Mcallen Miller Intl AP, TX January 9 - January 3 Edinburg, TXJanuary 8 - January 2 Zapata 1 S, TX January 19 - December 22

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