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United States weather

Weather in San Antonio, Texas for January 2026

Your guide to San Antonio weather in January - trends and predictions

    Snow Forecast ❄️

  • Snowfall in San Antonio during January is quite rare, with fewer than 2 snowy days on average.
    According to San Antonio snow forecast for January 2026, no snow is expected at the beginning of the month.

    • Temperatures

  • The forecast for the upcoming days in San Antonio predicts a temperature of 24.5 °F, which is slightly above the historical average.

  • In general, the average temperature in San Antonio at the beginning of January is 21.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.1 °F by the end of January.

    • Rain 🌧️

  • The climate of San Antonio in January is notably wet, with an average of 12 rainy days, and a total of 80.9 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
18
Dry days
Average rainy days
12
Rainy days
Average snowy days
1
Snow days
Average temperatures
16°/7°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
60 %
Avg humidity

San Antonio Weather January

Move between months or click on a day
December
February
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
26°
2
Sunny
25°
3
Cloudy
22°
4
Cloudy
19°
5
Patchy rain possible
24°
6
Sunny
19°
7
Patchy rain possible
17°
8
Overcast
16°
9
Patchy rain possible
14°
10
Partly cloudy
18°
11
Overcast
23°
12
Sunny
19°
13
Sunny
17°
14
Sunny
14°
15
Partly cloudy
13°
16
Patchy rain possible
16°
17
Sunny
19°
18
Sunny
22°
19
Overcast
14°
20
Patchy rain possible
9°
21
Moderate rain at times
10°
22
Sunny
16°
23
Overcast
16°
24
Moderate or heavy rain shower
17°
25
Sunny
16°
26
Mist
16°
27
Overcast
13°
28
Patchy rain possible
14°
29
Patchy rain possible
21°
30
Patchy rain possible
17°
31
Partly cloudy
16°

Temperatures trend during January in San Antonio

See the weather trend as well as the moving average line

January weather in San Antonio day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Sunny
Sunny
 26° /16° 0 mm 0 cm
Jan. 2 Sunny
Sunny
 25° /14° 0 mm 0 cm
Jan. 3 Cloudy
Cloudy
 22° /15° 0 mm 0 cm
Jan. 4 Cloudy
Cloudy
 19° /15° 0 mm 0 cm
Jan. 5 Patchy rain possible
Patchy rain possible
 24° /15° 0.3 mm 0 cm
Jan. 6 Sunny
Sunny
 19° /7° 0 mm 0 cm
Jan. 7 Patchy rain possible
Patchy rain possible
 17° /7° 0.4 mm 0 cm
Jan. 8 Overcast
Overcast
 16° /8° 0.9 mm 0 cm
Jan. 9 Patchy rain possible
Patchy rain possible
 14° /7° 14.3 mm 0 cm
Jan. 10 Partly cloudy
Partly cloudy
 18° /7° 13.7 mm 0 cm
Jan. 11 Overcast
Overcast
 23° /7° 0 mm 0 cm
Jan. 12 Sunny
Sunny
 19° /6° 0 mm 0 cm
Jan. 13 Sunny
Sunny
 17° /4° 0 mm 0 cm
Jan. 14 Sunny
Sunny
 14° /3° 0 mm 0 cm
Jan. 15 Partly cloudy
Partly cloudy
 13° /6° 0.3 mm 0 cm
Jan. 16 Patchy rain possible
Patchy rain possible
 16° /4° 0 mm 0 cm
Jan. 17 Sunny
Sunny
 19° /5° 0 mm 0 cm
Jan. 18 Sunny
Sunny
 22° /8° 0.9 mm 0 cm
Jan. 19 Overcast
Overcast
 14° /4° 0 mm 0 cm
Jan. 20 Patchy rain possible
Patchy rain possible
 9° /2° 0.2 mm 0 cm
Jan. 21 Moderate rain at times
Moderate rain at times
 10° /4° 4 mm 1.3 cm
Jan. 22 Sunny
Sunny
 16° /4° 13.1 mm 0 cm
Jan. 23 Overcast
Overcast
 16° /7° 4.3 mm 0 cm
Jan. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /7° 11.5 mm 0 cm
Jan. 25 Sunny
Sunny
 16° /5° 0 mm 0 cm
Jan. 26 Mist
Mist
 16° /7° 0 mm 0 cm
Jan. 27 Overcast
Overcast
 13° /7° 0.1 mm 0 cm
Jan. 28 Patchy rain possible
Patchy rain possible
 14° /8° 2.7 mm 0 cm
Jan. 29 Patchy rain possible
Patchy rain possible
 21° /10° 3.5 mm 0 cm
Jan. 30 Patchy rain possible
Patchy rain possible
 17° /9° 2.1 mm 0 cm
Jan. 31 Partly cloudy
Partly cloudy
 16° /6° 1.4 mm 0 cm
Next
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.
Change Month
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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 16° and cooler nights around 7°. 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 80.9 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
Will it snow in San Antonio in January 2026?
San Antonio typically sees 1.32 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 21 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 ❄️
On average, San Antonio sees 1 snowy days during January, with approximately 1.3 cm of total snowfall.

January rainfall patterns in San Antonio

Explore the daily rainfall trends and prepare for San Antonios January weather 💧
Typically, San Antonio has 12 rainy days in January with a total of 80.9 mm of rainfall.

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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Get accurate weather forecasts for San Antonio, located at latitude 29.424 and longitude -98.494. Stay updated with localized weather information tailored for San Antonio.

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