Climate Comfort Score
92/100
Excellent
2026 data Public-data reference. official source
San Antonio, TX Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →
30-year climate normals from 1 weather station (1991-2020).
San Antonio, Texas has an average annual temperature of 70°F and a climate comfort score of 92/100 (Excellent). Annual precipitation totals 32.4". Based on NOAA 30-year normals (1991–2020).
Avg Temperature
70°F (21°C)
Avg High
80°F
Avg Low
59°F
Annual Precip
32.4"
Annual Snow
0.2"
Comfort Score
92/100
Excellent
Avg Annual Temperature
70°F
30-year mean (NOAA NCEI)
Annual Precipitation
32.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (San Antonio) 92.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the San Antonio area.
Warming context for San Antonio
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for San Antonio captures average conditions across the spread shown — the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 63°F (17°C) | 41°F (5°C) | 52°F (11°C) | 2.0" | 0.0" | 4.7 | 0.0 |
| February | 68°F (20°C) | 45°F (7°C) | 56°F (13°C) | 1.7" | 0.1" | 2.7 | 0.2 |
| March | 74°F (23°C) | 52°F (11°C) | 63°F (17°C) | 2.3" | 0.0" | 1.0 | 0.5 |
| April | 80°F (27°C) | 58°F (15°C) | 69°F (21°C) | 2.4" | 0.0" | 0.0 | 3.2 |
| May | 87°F (30°C) | 66°F (19°C) | 77°F (25°C) | 4.4" | 0.0" | 0.0 | 11.8 |
| June | 92°F (34°C) | 73°F (23°C) | 83°F (28°C) | 3.3" | 0.0" | 0.0 | 24.0 |
| July | 95°F (35°C) | 75°F (24°C) | 85°F (29°C) | 2.4" | 0.0" | 0.0 | 28.5 |
| August | 96°F (36°C) | 75°F (24°C) | 86°F (30°C) | 2.1" | 0.0" | 0.0 | 28.8 |
| September | 90°F (32°C) | 70°F (21°C) | 80°F (27°C) | 3.9" | 0.0" | 0.0 | 19.7 |
| October | 82°F (28°C) | 60°F (16°C) | 71°F (22°C) | 3.8" | 0.0" | 0.0 | 5.6 |
| November | 72°F (22°C) | 50°F (10°C) | 61°F (16°C) | 2.1" | 0.0" | 1.3 | 0.1 |
| December | 65°F (18°C) | 42°F (6°C) | 54°F (12°C) | 2.0" | 0.1" | 4.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.0"
6.9 days with precipitation
February 1.7"
Snow: 0.1"
7.4 days with precipitation
March 2.3"
8.5 days with precipitation
April 2.4"
6.4 days with precipitation
May 4.4"
8.3 days with precipitation
June 3.3"
7.0 days with precipitation
July 2.4"
5.0 days with precipitation
August 2.1"
4.7 days with precipitation
September 3.9"
6.9 days with precipitation
October 3.8"
6.4 days with precipitation
November 2.1"
6.4 days with precipitation
December 2.0"
Snow: 0.1"
7.4 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 28
50% probability date
Last Spring Freeze
February 26
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,438
Higher = more heating needed
Cooling Degree Days
3,148
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 63% | 7.6 | 25% | 40% |
| February | 61% | 8.5 | -2065% | -2053% |
| March | 65% | 9.4 | -815% | -796% |
| April | 64% | 9.8 | 20% | 38% |
| May | 68% | 9.3 | -3325% | -3321% |
| June | 67% | 9.2 | -3325% | -3322% |
| July | 62% | 8.5 | -1236% | -1242% |
| August | 63% | 7.4 | -819% | -822% |
| September | 63% | 7.1 | 31% | 15% |
| October | 65% | 7.8 | 31% | 29% |
| November | 64% | 7.4 | 27% | 35% |
| December | 62% | 7.5 | -2480% | -2470% |
Nearby Cities
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Climate Guides
Climate Insight: San Antonio, TX
The NOAA 1991–2020 climate normals describe San Antonio, Texas as a location with an annual average temperature of 70°F, ranging from a mean daily high of 80°F to a mean daily low of 59°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USW00012921, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. San Antonio receives roughly 32.4 inches of precipitation each year, with seasonal snowfall possible. Growing-season length varies with elevation and microclimate, with the last spring freeze near February 26 and the first fall freeze near November 28. For energy use, 1,438 heating degree days and 3,148 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, San Antonio scores 92/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows — shoulder seasons for mild highs and lows, peak summer for August-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in San Antonio, TX? ▼
The average annual temperature in San Antonio, Texas is 70°F. The warmest month averages 96°F (36°C) and the coldest averages 41°F (5°C).
How much rain does San Antonio get? ▼
San Antonio receives 32.4 inches of precipitation annually, including 0.2 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for San Antonio? ▼
San Antonio has a climate comfort score of 92/100 (Excellent). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in San Antonio? ▼
Growing season data is not available for San Antonio.
How much energy does heating and cooling require in San Antonio? ▼
San Antonio has 1,438 heating degree days and 3,148 cooling degree days annually. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this San Antonio climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USW00012921. These 30-year averages are the standard reference for typical weather conditions.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00012921. For informational purposes only.
Read our methodology — how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
