Peak in August
Coolest in January
Heavy in May
Peak in dry season
San Antonio Monthly Weather Guide
Click any month to explore daily weather forecasts
January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for San Antonio
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
As of Dec 2021, San Antonio has 5G from ...
Safety
Moderate Safety
GPI: 2.44
Best Time to Visit San Antonio
Location, climate overview & historical trends
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📍 29.4241° N, 98.4936° W
Open in Google MapsSan Antonio is a prominent destination in United States.
Located at 29.42°N latitude,San Antonio experiences a subtropical climate with distinct wet and dry seasons.
Based on 30 years of data, August is the warmest month (avg. 35°C), while January is the coolest. May sees the most rain (29% chance), making August the driest month.
Historical Climate Trend
30-Year Analysis+1.76°C
Total over 30 years
+0.59°C
Per decade
Linear regression analysis of historical maximum temperatures for San Antonio, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)January, February, March
Best months to visit
27°C
Avg High
Based on 30 years of NASA satellite data,San Antonio receives approximately 413mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
26.4°
2024 Avg
27.8°
2040 Proj
28.5°
+0.59°C
per decade (observed)
+0.43°C
per decade (CMIP6)
🌡️ San Antonio has warmed by +1.8°C since 1995. By 2040, an additional +0.7°C is projected (based on CMIP6 rate of 0.427°C/decade), for a total of +2.4°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for San Antonio
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Balanced traffic
0
slots per day
Peak
Jun
Low
Feb
Monthly Traffic Distribution
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Health & Safety Advisory
CDC travel health recommendations
No Special Vaccinations Required
Standard travel precautions apply
Source: CDC Travelers' Health
View Complete Health GuideSan Antonio Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 17°C | 15% | 😊 Pleasant |
| February | 19°C | 17% | 😊 Pleasant |
| March | 24°C | 20% | ✨ Perfect |
| April | 27°C | 24% | ✨ Perfect |
| May | 31°C | 29% | 🔥 Hot |
| June | 34°C | 21% | 🔥 Hot |
| July | 35°C | 17% | 🔥 Hot |
| August | 35°C | 14% | 🔥 Hot |
| September | 32°C | 18% | 🔥 Hot |
| October | 28°C | 18% | ✨ Perfect |
| November | 22°C | 18% | ✨ Perfect |
| December | 18°C | 15% | 😊 Pleasant |
Weather in Cities Near San Antonio
Explore climate data for popular destinations within easy reach
Austin
United States
New Orleans
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San Miguel de Allende
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Santa Fe
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Compare weather conditions with nearby destinations for your trip planning
Compare San Antonio Weather vs Popular Destinations
San Antonio Weather FAQ
When is the best time to visit San Antonio?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, January, February, March are usually great choices.
When is the hottest month in San Antonio?
August is historically the hottest month in San Antonio with average highs of 35°C.
When does it rain the most in San Antonio?
May typically sees the highest probability of rain (29%).
Is San Antonio expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.