San Augustine, Texas climate: Normal weather by month, frost dates and records
San Augustine's normal year runs from 35°F January nights to 94°F August afternoons, with 55.6 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 18.6°C, January lows of 2°C, August highs of 35°C, 1,411 mm of precipitation a year.
- NOAA stationSan Augustine
- Station IDUSC00417951
- Location31.52°N 94.12°W
- Elevation295 ft (90 m)
- Population1,848
On October 23, the normal high in San Augustine is 77°F and the normal low 51°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for San Augustine.
- Jan 60° 35°
- Feb 63° 39°
- Mar 70° 45°
- Apr 77° 53°
- May 84° 61°
- Jun 90° 68°
- Jul 94° 70°
- Aug 94° 70°
- Sep 89° 64°
- Oct 80° 53°
- Nov 70° 44°
- Dec 61° 37°
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 San Augustine each month?
August is the warmest month, with normal highs of 94°F; January the coldest, with normal lows of 35°F. The most precipitation falls in December (5.40 in), the least in July (3.22 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 35°F | 47.4°F | 4.95 | 9 | <1 | 13 | 10 h 20 min |
| February | 63°F | 39°F | 51.1°F | 5.11 | 8 | <1 | 7 | 11 h |
| March | 70°F | 45°F | 57.7°F | 5.22 | 8 | <1 | 2 | 12 h |
| April | 77°F | 53°F | 64.7°F | 4.65 | 7 | <1 | <1 | 12 h 50 min |
| May | 84°F | 61°F | 72.5°F | 4.30 | 7 | 6 | <1 | 13 h 40 min |
| June | 90°F | 68°F | 79.0°F | 4.80 | 8 | 19 | <1 | 14 h 10 min |
| July | 94°F | 70°F | 82.0°F | 3.22 | 7 | 25 | <1 | 14 h |
| August | 94°F | 70°F | 82.1°F | 4.28 | 7 | 27 | <1 | 13 h 20 min |
| September | 89°F | 64°F | 76.4°F | 4.18 | 6 | 16 | <1 | 12 h 20 min |
| October | 80°F | 53°F | 66.5°F | 4.75 | 6 | 3 | <1 | 11 h 30 min |
| November | 70°F | 44°F | 56.6°F | 4.70 | 8 | <1 | 4 | 10 h 30 min |
| December | 61°F | 37°F | 48.8°F | 5.40 | 9 | <1 | 12 | 10 h 10 min |
| Year (annual) | 78°F | 53°F | 65.4°F | 55.56 | 91 | 96 | 37 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 2°C | 8.6°C | 126 mm |
| February | 17°C | 4°C | 10.6°C | 130 mm |
| March | 21°C | 7°C | 14.3°C | 133 mm |
| April | 25°C | 11°C | 18.2°C | 118 mm |
| May | 29°C | 16°C | 22.5°C | 109 mm |
| June | 32°C | 20°C | 26.1°C | 122 mm |
| July | 34°C | 21°C | 27.8°C | 82 mm |
| August | 35°C | 21°C | 27.8°C | 109 mm |
| September | 31°C | 18°C | 24.7°C | 106 mm |
| October | 26°C | 12°C | 19.2°C | 121 mm |
| November | 21°C | 6°C | 13.7°C | 119 mm |
| December | 16°C | 3°C | 9.3°C | 137 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00417951; 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 San Augustine?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October 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 USC00417951.
When is the last frost in San Augustine?
In San Augustine, the last spring frost (32°F) comes after March 18 in half of years and after April 8 in one year in ten; the first autumn frost comes before November 13 in half of years and before October 29 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 181 year in 10 after April 8; 9 in 10 after February 26
- First autumn frost, half of years before
- November 131 year in 10 before October 29; 9 in 10 before December 2
NOAA puts the median frost-free season at 240 days, and the season without a hard freeze (28°F) at 267 days.
A hard freeze (28°F) comes after March 4 in half of springs and before November 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts San Augustine in zone 8b in ZIP code 75972, the nearest ZIP area.
Frost dates for every NOAA station in Texas · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00417951; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 San Augustine?
In a normal year in San Augustine, 96 days a year reach 90°F (8 of them 100°F or more), 37 nights fall to 32°F or colder and 91 days bring measurable precipitation.
- Days at 90°F or more
- 96a normal year
- Days at 100°F or more
- 8a normal year
- Nights at 32°F or colder
- 37a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 91a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00417951.
How sunny is San Augustine?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around San Augustine, 4.6 kWh per square metre a day. August is the sunniest month (85%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.8 |
| February | 65% | 3.2 |
| March | 71% | 4.3 |
| April | 76% | 5.4 |
| May | 78% | 5.9 |
| June | 81% | 6.3 |
| July | 83% | 6.3 |
| August | 85% | 6.0 |
| September | 82% | 5.1 |
| October | 80% | 4.2 |
| November | 76% | 3.1 |
| December | 69% | 2.5 |
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 San Augustine need?
A normal year in San Augustine brings 2,183 heating degree days, 59% fewer than the median U.S. place (5,373), and 2,355 cooling degree days, 2.6 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 6,121 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 549 | 5 |
| February | 396 | 7 |
| March | 254 | 29 |
| April | 98 | 89 |
| May | 16 | 247 |
| June | 0 | 420 |
| July | 0 | 525 |
| August | 0 | 531 |
| September | 3 | 345 |
| October | 79 | 124 |
| November | 278 | 26 |
| December | 511 | 8 |
| Year (annual) | 2,183 | 2,355 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00417951. 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.
Has San Augustine been warmer than normal lately?
2025 averaged 67.2°F, 1.8°F above the 1991-2020 normal of 65.4°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 66.2°F | +0.8°F | 61.16 |
| 2022 | 66.5°F | +1.1°F | 47.85 |
| 2023 | 68.2°F | +2.8°F | 43.57 |
| 2024 | 67.8°F | +2.4°F | 77.84 |
| 2025 | 67.2°F | +1.8°F | 50.60 |
Source: observed years: ACIS, station USC00417951. A year counts only with all twelve months complete.
How does San Augustine's climate compare?
San Augustine is warmer than 144 of the other 320 places with their own NOAA record in Texas, and wetter than 295. Across the 7,247 U.S. stations with normals, its annual mean of 65.4°F is warmer than 89%.
In the Köppen classification computed from these normals, San Augustine 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 San Augustine share this climate record?
2 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.
- Chireno, TX376 people · 13 mi W
- Broaddus, TX183 people · 17 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 San Augustine's climate
What is the coldest month in San Augustine?
January, with a normal high of 60°F and a normal low of 35°F. The warmest is August (94°F by day, 70°F at night).
Does it snow in San Augustine?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in San Augustine?
December, with 5.40 in of precipitation in a normal year; the driest is July with 3.22 in.
What plant hardiness zone is San Augustine in?
The USDA's 2023 map puts San Augustine in zone 8b in ZIP code 75972, the nearest ZIP area.
How late can frost come in San Augustine?
In half of years the last 32°F night comes after March 18; in one year in ten it comes after April 8. Waiting until April 8 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Texas climateThe statewide normals and every place in the state
- Center, TX20 miles from this station, 65.6°F a year
- Nacogdoches, TX32 miles from this station, 65.8°F a year
- Sam Rayburn, TX32 miles from this station, 68.5°F a year
- Many, LA38 miles from this station, 64.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made