Austin San Antonio, Texas climate: Climate normals at a NOAA weather station
Austin San Antonio's normal year runs from 40°F January nights to 98°F August afternoons, with 31.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.9°C, January lows of 5°C, August highs of 36°C, 794 mm of precipitation a year.
- NOAA stationAustin San Antonio
- Station IDUSW00012971
- Location29.70°N 98.03°W
- Elevation633 ft (193 m)
On October 23, the normal high in Austin San Antonio is 81°F and the normal low 57°F, and the chance of measurable rain or snow is 23%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Austin San Antonio.
- Jan 64° 40°
- Feb 68° 44°
- Mar 75° 51°
- Apr 82° 58°
- May 88° 66°
- Jun 93° 71°
- Jul 96° 73°
- Aug 98° 73°
- Sep 92° 68°
- Oct 84° 59°
- Nov 73° 49°
- Dec 65° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Austin San Antonio each month?
August is the warmest month, with normal highs of 98°F; January the coldest, with normal lows of 40°F. The most precipitation falls in May (3.63 in), the least in February (1.72 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 64°F | 40°F | 52.2°F | 2.14 | 6 | <1 | 7 | 10 h 30 min |
| February | 68°F | 44°F | 56.0°F | 1.72 | 6 | <1 | 4 | 11 h 10 min |
| March | 75°F | 51°F | 62.8°F | 2.49 | 8 | 1 | 1 | 12 h |
| April | 82°F | 58°F | 69.8°F | 2.00 | 6 | 3 | <1 | 12 h 50 min |
| May | 88°F | 66°F | 76.6°F | 3.63 | 8 | 13 | <1 | 13 h 40 min |
| June | 93°F | 71°F | 82.4°F | 3.44 | 6 | 25 | <1 | 14 h |
| July | 96°F | 73°F | 84.5°F | 2.21 | 6 | 29 | <1 | 13 h 50 min |
| August | 98°F | 73°F | 85.1°F | 2.01 | 5 | 29 | <1 | 13 h 10 min |
| September | 92°F | 68°F | 79.9°F | 3.45 | 7 | 21 | <1 | 12 h 20 min |
| October | 84°F | 59°F | 71.3°F | 3.30 | 7 | 7 | <1 | 11 h 30 min |
| November | 73°F | 49°F | 61.0°F | 2.46 | 7 | <1 | 2 | 10 h 40 min |
| December | 65°F | 42°F | 53.5°F | 2.42 | 6 | <1 | 6 | 10 h 20 min |
| Year (annual) | 82°F | 58°F | 69.6°F | 31.27 | 78 | 128 | 20 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 18°C | 5°C | 11.2°C | 54 mm |
| February | 20°C | 7°C | 13.3°C | 44 mm |
| March | 24°C | 10°C | 17.1°C | 63 mm |
| April | 28°C | 14°C | 21.0°C | 51 mm |
| May | 31°C | 19°C | 24.8°C | 92 mm |
| June | 34°C | 22°C | 28.0°C | 87 mm |
| July | 36°C | 23°C | 29.2°C | 56 mm |
| August | 36°C | 23°C | 29.5°C | 51 mm |
| September | 33°C | 20°C | 26.6°C | 88 mm |
| October | 29°C | 15°C | 21.8°C | 84 mm |
| November | 23°C | 10°C | 16.1°C | 62 mm |
| December | 19°C | 5°C | 11.9°C | 61 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00012971; 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.
Which months are mildest at Austin San Antonio?
Normal highs sit between 65°F and 85°F in February, March, April, October, November and December. Of those, February 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 USW00012971.
When is the last frost at Austin San Antonio?
In Austin San Antonio, the last spring frost (32°F) comes after March 1 in half of years and after March 20 in one year in ten; the first autumn frost comes before November 26 in half of years and before November 8 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- March 11 year in 10 after March 20; 9 in 10 after February 3
- First autumn frost, half of years before
- November 261 year in 10 before November 8; 9 in 10 before December 20
NOAA puts the median frost-free season at 273 days, and the season without a hard freeze (28°F) at 306 days.
A hard freeze (28°F) comes after February 13 in half of springs and before December 11 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Austin San Antonio in zone 9a in ZIP code 78130, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 9a: the coldest night of a typical year reaches 22°F (24 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 USW00012971; 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 at Austin San Antonio?
In a normal year in Austin San Antonio, 128 days a year reach 90°F (26 of them 100°F or more), 20 nights fall to 32°F or colder and 78 days bring measurable precipitation.
- Days at 90°F or more
- 128a normal year
- Days at 100°F or more
- 26a normal year
- Nights at 32°F or colder
- 20a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 78a normal year
The highest temperature in this station's record (since 1996) is 112°F, on September 5, 2000; the lowest is 11°F, on February 15, 2021.
The wettest calendar year on that record is 2004, with 56.99 in.
Source: NOAA NCEI 1991-2020 annual normals, station USW00012971; records: ACIS (NOAA Regional Climate Centers), station USW00012971. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Austin San Antonio?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Austin San Antonio, 4.8 kWh per square metre a day. August is the sunniest month (88%) and February the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 3.1 |
| February | 69% | 3.6 |
| March | 71% | 4.5 |
| April | 74% | 5.4 |
| May | 76% | 5.8 |
| June | 84% | 6.7 |
| July | 86% | 6.7 |
| August | 88% | 6.4 |
| September | 81% | 5.2 |
| October | 81% | 4.4 |
| November | 76% | 3.3 |
| December | 72% | 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 many heating and cooling degree days does Austin San Antonio record?
A normal year at Austin San Antonio brings 1,446 heating degree days, 73% fewer than the median U.S. place (5,373), and 3,144 cooling degree days, 3.5 times the median (908). Two months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,389 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 405 | 10 |
| February | 275 | 25 |
| March | 144 | 74 |
| April | 34 | 176 |
| May | 3 | 362 |
| June | 0 | 522 |
| July | 0 | 605 |
| August | 0 | 623 |
| September | 1 | 446 |
| October | 32 | 226 |
| November | 181 | 61 |
| December | 372 | 15 |
| Year (annual) | 1,446 | 3,144 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00012971. 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.
Have recent years at Austin San Antonio been warmer than normal?
2025 averaged 71.6°F, 2.0°F above the 1991-2020 normal of 69.6°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 70.3°F | +0.7°F | 37.06 |
| 2022 | 70.9°F | +1.3°F | 12.64 |
| 2023 | 72.5°F | +2.9°F | 23.45 |
| 2024 | 73.1°F | +3.5°F | 22.54 |
| 2025 | 71.6°F | +2.0°F | 26.50 |
Source: observed years: ACIS, station USW00012971. A year counts only with all twelve months complete.
How does Austin San Antonio's climate compare?
Austin San Antonio is warmer than 253 of the 321 places with their own NOAA record in Texas, and wetter than 160. Across the 7,247 U.S. stations with normals, its annual mean of 69.6°F is warmer than 95%.
In the Köppen classification computed from these normals, Austin San Antonio 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 Austin San Antonio share this climate record?
4 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.
- Seguin, TX38,789 people · 9 mi SE
- McQueeney, TX2,469 people · 7 mi S
- Lake Dunlap, TX1,230 people · 4 mi SW
- Geronimo, TX977 people · 4 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Austin San Antonio's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Austin San Antonio. This page uses AUSTIN SAN ANTONIO; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| New Braunfels Weather Office USC00416273 | in town | 628 ft | 68.6°F | 40°F | 96°F | 35.0 | – | February 25 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Austin San Antonio's climate
What is the coldest month at Austin San Antonio?
January, with a normal high of 64°F and a normal low of 40°F. The warmest is August (98°F by day, 73°F at night).
What is the rainiest month at Austin San Antonio?
May, with 3.63 in of precipitation in a normal year; the driest is February with 1.72 in.
What plant hardiness zone is Austin San Antonio in?
The USDA's 2023 map puts Austin San Antonio in zone 9a in ZIP code 78130, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 22°F (24 years, 1991-2020): zone 9a.
How late can frost come at Austin San Antonio?
In half of years the last 32°F night comes after March 1; in one year in ten it comes after March 20. Waiting until March 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- New Braunfels, TX9 miles from this station, 67.1°F a year
- San Marcos, TX13 miles from this station, 68.6°F a year
- Canyon Lake, TX15 miles from this station, 68.1°F a year
- Randolph AFB, TX19 miles from this station, 69.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made