San Antonio
January
Weather in San Antonio for January 2026
Your guide to San Antonio weather in January - trends and predictions
In general, the average temperature in San Antonio at the beginning of January is 19.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °F by the end of January.
San Antonio experiences moderate rainfall in January, with an average of 10 rainy days and a total precipitation of 63.3 mm.
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Temperatures
Rain 🌧️
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21
Dry days
10
Rainy days
0
Snow days
18°/8°
Temperatures
20 km/h
Avg max wind
60 %
Avg humidity
San Antonio Weather January
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  20° | 2  18° | 3  20° | ||||
| 4 19° | 5 22° | 6 19° | 7 17° | 8  16° | 9 14° | 10 18° |
| 11 23° | 12 19° | 13 17° | 14 14° | 15 13° | 16 16° | 17 19° |
| 18 22° | 19 14° | 20 9° | 21  10° | 22 16° | 23 16° | 24 17° |
| 25 16° | 26  16° | 27 13° | 28 14° | 29 21° | 30 17° | 31 16° |
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Temperatures trend during January in San Antonio
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Jan. 1 | Partly cloudy | 20° /9° | 0 mm | 0 cm | |
| Jan. 2 | Patchy rain possible | 18° /11° | 3.8 mm | 0 cm | |
| Jan. 3 | Sunny | 20° /11° | 0.5 mm | 0 cm | |
| Jan. 4 | Partly cloudy | 19° /10° | 2.5 mm | 0 cm | |
| Jan. 5 | Sunny | 22° /10° | 0.6 mm | 0 cm | |
| Jan. 6 | Sunny | 19° /7° | 0 mm | 0 cm | |
| Jan. 7 | Patchy rain possible | 17° /7° | 0.4 mm | 0 cm | |
| Jan. 8 | Overcast | 16° /8° | 0.9 mm | 0 cm | |
| Jan. 9 | Patchy rain possible | 14° /7° | 14.3 mm | 0 cm | |
| Jan. 10 | Partly cloudy | 18° /7° | 13.7 mm | 0 cm | |
| Jan. 11 | Overcast | 23° /7° | 0 mm | 0 cm | |
| Jan. 12 | Sunny | 19° /6° | 0 mm | 0 cm | |
| Jan. 13 | Sunny | 17° /4° | 0 mm | 0 cm | |
| Jan. 14 | Sunny | 14° /3° | 0 mm | 0 cm | |
| Jan. 15 | Partly cloudy | 13° /6° | 0.3 mm | 0 cm | |
| Jan. 16 | Patchy rain possible | 16° /4° | 0 mm | 0 cm | |
| Jan. 17 | Sunny | 19° /5° | 0 mm | 0 cm | |
| Jan. 18 | Sunny | 22° /8° | 0.9 mm | 0 cm | |
| Jan. 19 | Overcast | 14° /4° | 0 mm | 0 cm | |
| Jan. 20 | Patchy rain possible | 9° /2° | 0.2 mm | 0 cm | |
| Jan. 21 | Moderate rain at times | 10° /4° | 4 mm | 1.3 cm | |
| Jan. 22 | Sunny | 16° /4° | 13.1 mm | 0 cm | |
| Jan. 23 | Overcast | 16° /7° | 4.3 mm | 0 cm | |
| Jan. 24 | Moderate or heavy rain shower | 17° /7° | 11.5 mm | 0 cm | |
| Jan. 25 | Sunny | 16° /5° | 0 mm | 0 cm | |
| Jan. 26 | Mist | 16° /7° | 0 mm | 0 cm | |
| Jan. 27 | Overcast | 13° /7° | 0.1 mm | 0 cm | |
| Jan. 28 | Patchy rain possible | 14° /8° | 2.7 mm | 0 cm | |
| Jan. 29 | Patchy rain possible | 21° /10° | 3.5 mm | 0 cm | |
| Jan. 30 | Patchy rain possible | 17° /9° | 2.1 mm | 0 cm | |
| Jan. 31 | Partly cloudy | 16° /6° | 1.4 mm | 0 cm | |
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Important Notice
Our weather forecast for San Antonio in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Antonio forecast closer to your planned date for the most up-to-date weather information.
San Antonio in January - FAQ
What are the expected maximum and minimum temperatures in San Antonio during January?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in San Antonio during January?
Moderate rainfall is anticipated in San Antonio during January, with a total of 63.3 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
Will it snow in San Antonio in January 2026?
San Antonio typically sees 0.005 cm of snowfall during January.
What are the typical wind conditions in San Antonio during January?
The average wind speed in San Antonio during January is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
San Antonio snow forecast January 2026
Track daily snowfall levels and discover San Antonio’s snowy potential this January ❄️
January rainfall patterns in San Antonio
Explore the daily rainfall trends and prepare for San Antonios January weather 💧
UV exposure in San Antonio during January
Stay informed about UV levels for safe outdoor activities throughout the month of January ☀️
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