Robstown, Texas climate: Normal weather by month, frost dates and records
Robstown's normal year runs from 47°F January nights to 96°F August afternoons, with 31.1 inches of precipitation and less than an inch of snow (0.2 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 22.8°C, January lows of 8°C, August highs of 36°C, 790 mm of precipitation a year.
- NOAA stationRobstown
- Station IDUSC00417677
- Location27.79°N 97.66°W
- Elevation85 ft (26 m)
- Population10,383
On October 22, the normal high in Robstown is 85°F and the normal low 63°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Robstown.
- Jan 68° 47°
- Feb 72° 51°
- Mar 77° 57°
- Apr 83° 64°
- May 88° 70°
- Jun 93° 75°
- Jul 95° 76°
- Aug 96° 76°
- Sep 92° 72°
- Oct 86° 65°
- Nov 77° 56°
- Dec 70° 49°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Robstown each month?
August is the warmest month, with normal highs of 96°F; January the coldest, with normal lows of 47°F. The most precipitation falls in September (5.02 in), the least in February (1.50 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 68°F | 47°F | 57.2°F | 1.54 | 7 | <1 | 2 | 10 h 30 min |
| February | 72°F | 51°F | 61.4°F | 1.50 | 7 | <1 | 1 | 11 h 10 min |
| March | 77°F | 57°F | 67.2°F | 2.15 | 7 | 1 | <1 | 12 h |
| April | 83°F | 64°F | 73.3°F | 1.70 | 6 | 3 | <1 | 12 h 50 min |
| May | 88°F | 70°F | 79.2°F | 3.31 | 5 | 11 | <1 | 13 h 30 min |
| June | 93°F | 75°F | 84.0°F | 3.03 | 5 | 24 | <1 | 13 h 50 min |
| July | 95°F | 76°F | 85.3°F | 2.75 | 5 | 28 | <1 | 13 h 40 min |
| August | 96°F | 76°F | 86.2°F | 3.02 | 5 | 29 | <1 | 13 h 10 min |
| September | 92°F | 72°F | 82.1°F | 5.02 | 9 | 20 | <1 | 12 h 20 min |
| October | 86°F | 65°F | 75.2°F | 3.27 | 6 | 7 | <1 | 11 h 30 min |
| November | 77°F | 56°F | 66.3°F | 2.14 | 6 | 1 | <1 | 10 h 50 min |
| December | 70°F | 49°F | 59.4°F | 1.67 | 6 | <1 | 1 | 10 h 20 min |
| Year (annual) | 83°F | 63°F | 73.1°F | 31.10 | 72 | 124 | 4 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 20°C | 8°C | 14.0°C | 39 mm |
| February | 22°C | 10°C | 16.3°C | 38 mm |
| March | 25°C | 14°C | 19.6°C | 55 mm |
| April | 28°C | 18°C | 22.9°C | 43 mm |
| May | 31°C | 21°C | 26.2°C | 84 mm |
| June | 34°C | 24°C | 28.9°C | 77 mm |
| July | 35°C | 24°C | 29.6°C | 70 mm |
| August | 36°C | 24°C | 30.1°C | 77 mm |
| September | 33°C | 22°C | 27.8°C | 128 mm |
| October | 30°C | 18°C | 24.0°C | 83 mm |
| November | 25°C | 13°C | 19.1°C | 54 mm |
| December | 21°C | 9°C | 15.2°C | 42 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00417677; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Robstown?
Normal highs sit between 65°F and 85°F in January, February, March, April, November and December. Of those, November has the fewest days with rain (6).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00417677.
When is the last frost in Robstown?
In Robstown, the last spring frost (32°F) comes after January 26 in half of years and after March 3 in one year in ten; the first autumn frost comes before December 24 in half of years and before November 28 in one year in ten. A night at 32°F or colder comes at all in 82% of years here (NOAA).
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- January 261 year in 10 after March 3; 9 in 10 after December 18
- First autumn frost, half of years before
- December 241 year in 10 before November 28; 9 in 10 before February 2
NOAA puts the median frost-free season at 336 days, and the season without a hard freeze (28°F) at 365 days.
A hard freeze (28°F) comes after January 10 in half of springs and before January 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Robstown in zone 9b in ZIP code 78380, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Robstown's NOAA station is in zone 9b: the coldest night of a typical year reaches 30°F (18 complete years).
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00417677; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Robstown?
In a normal year in Robstown, 124 days a year reach 90°F (4 of them 100°F or more), 4 nights fall to 32°F or colder and 72 days bring measurable precipitation.
- Days at 90°F or more
- 124a normal year
- Days at 100°F or more
- 4a normal year
- Nights at 32°F or colder
- 4a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 72a normal year
The highest temperature in this station's record (since 1953) is 113°F, on August 31, 1983; the lowest is 14°F, on December 25, 1983.
The wettest calendar year on that record is 1971, with 55.62 in; the snowiest season is 2004–05, with 5.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00417677; records: ACIS (NOAA Regional Climate Centers), station USC00417677. Records use complete months only; a month missing more than three days is left out.
How sunny is Robstown?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Robstown, 4.9 kWh per square metre a day. August is the sunniest month (89%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 3.0 |
| February | 70% | 3.6 |
| March | 73% | 4.6 |
| April | 77% | 5.4 |
| May | 81% | 6.0 |
| June | 87% | 6.6 |
| July | 87% | 6.5 |
| August | 89% | 6.3 |
| September | 81% | 5.2 |
| October | 84% | 4.6 |
| November | 77% | 3.5 |
| December | 70% | 2.8 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Robstown need?
A normal year in Robstown brings 821 heating degree days, 85% fewer than the median U.S. place (5,373), and 3,787 cooling degree days, 4.2 times the median (908). No month reaches 300 heating degree days. For gardens and crops, NOAA counts 8,522 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 269 | 27 |
| February | 152 | 51 |
| March | 66 | 136 |
| April | 13 | 263 |
| May | 0 | 441 |
| June | 0 | 568 |
| July | 0 | 628 |
| August | 0 | 656 |
| September | 0 | 515 |
| October | 12 | 328 |
| November | 86 | 127 |
| December | 224 | 49 |
| Year (annual) | 821 | 3,787 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00417677. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Robstown's climate compare?
Robstown is warmer than 303 of the other 320 places with their own NOAA record in Texas, and wetter than 159. Across the 7,247 U.S. stations with normals, its annual mean of 73.1°F is warmer than 97%.
In the Köppen classification computed from these normals, Robstown is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Robstown share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- North San Pedro, TX705 people · 2 mi NW
- Spring Gardens, TX591 people · 5 mi W
- La Paloma-Lost Creek, TX541 people · 7 mi SW
- Banquete, TX488 people · 8 mi W
- Rancho Banquete, TX266 people · 11 mi W
- Petronila, TX85 people · 8 mi S
- Tierra Verde, TX49 people · 4 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Robstown's climate
What is the coldest month in Robstown?
January, with a normal high of 68°F and a normal low of 47°F. The warmest is August (96°F by day, 76°F at night).
Does it snow in Robstown?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in Robstown?
September, with 5.02 in of precipitation in a normal year; the driest is February with 1.50 in.
What plant hardiness zone is Robstown in?
The USDA's 2023 map puts Robstown in zone 9b in ZIP code 78380, the nearest ZIP area. By the same method at Robstown's NOAA station, the coldest night of a typical year reaches 30°F (18 years, 1991-2020): zone 9b.
How late can frost come in Robstown?
In half of years the last 32°F night comes after January 26; in one year in ten it comes after March 3. Waiting until March 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Corpus Christi, TX9 miles from this station, 73.0°F a year
- Corpus Christi Cabaniss Field, TX16 miles from this station, 73.6°F a year
- Bishop, TX17 miles from this station, 72.4°F a year
- C C Botanical Gardens, TX19 miles from this station, 71.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made