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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

    Official Weather Alert ⚠️

  • Extreme Cold Warning - See hour by hour.

    • 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 until the end of the month.

    • Temperatures

  • So far, January 2026 in San Antonio is slightly warmer than the historical average by 1 °F.

  • Expect cooler weather in the next days in San Antonio with the forecast suggesting a temperature of 13 °F, lower than the historical average.

  • In general, the average temperature in San Antonio at the beginning of January is 20.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 14 °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
Partly cloudy
20°
2
Patchy rain possible
21°
3
Sunny
21°
4
Partly cloudy
20°
5
Mist
21°
6
Sunny
21°
7
Overcast
18°
8
Overcast
18°
9
Patchy rain possible
15°
10
Partly cloudy
18°
11
Overcast
21°
12
Sunny
18°
13
Sunny
16°
14
Sunny
16°
15
Partly cloudy
15°
16
Sunny
18°
17
Sunny
17°
18
Sunny
22°
19
Overcast
16°
20
Overcast
10°
21
Overcast
11°
22
Sunny
17°
23
Overcast
17°
24
Moderate or heavy rain shower
17°
25
Sunny
13°
26
Sunny
13°
27
Weather Alert Sunny
14°
28
Sunny
16°
29
Mist
19°
30
Sunny
15°
31
Sunny
8°

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 Partly cloudy
Partly cloudy
 20° /9° 0 mm 0 cm
Jan. 2 Patchy rain possible
Patchy rain possible
 21° /11° 2.9 mm 0 cm
Jan. 3 Sunny
Sunny
 21° /11° 0.3 mm 0 cm
Jan. 4 Partly cloudy
Partly cloudy
 20° /9° 1.9 mm 0 cm
Jan. 5 Mist
Mist
 21° /10° 0.5 mm 0 cm
Jan. 6 Sunny
Sunny
 21° /9° 0 mm 0 cm
Jan. 7 Overcast
Overcast
 18° /9° 0.3 mm 0 cm
Jan. 8 Overcast
Overcast
 18° /10° 0.7 mm 0 cm
Jan. 9 Patchy rain possible
Patchy rain possible
 15° /9° 13.2 mm 0 cm
Jan. 10 Partly cloudy
Partly cloudy
 18° /7° 10.3 mm 0 cm
Jan. 11 Overcast
Overcast
 21° /7° 0 mm 0 cm
Jan. 12 Sunny
Sunny
 18° /6° 0 mm 0 cm
Jan. 13 Sunny
Sunny
 16° /5° 0 mm 0 cm
Jan. 14 Sunny
Sunny
 16° /3° 0 mm 0 cm
Jan. 15 Partly cloudy
Partly cloudy
 15° /6° 0.2 mm 0 cm
Jan. 16 Sunny
Sunny
 18° /4° 0 mm 0 cm
Jan. 17 Sunny
Sunny
 17° /5° 0 mm 0 cm
Jan. 18 Sunny
Sunny
 22° /8° 0.9 mm 0 cm
Jan. 19 Overcast
Overcast
 16° /3° 0 mm 0 cm
Jan. 20 Overcast
Overcast
 10° /3° 0.2 mm 0 cm
Jan. 21 Overcast
Overcast
 11° /5° 3 mm 1 cm
Jan. 22 Sunny
Sunny
 17° /5° 9.8 mm 0 cm
Jan. 23 Overcast
Overcast
 17° /9° 3.2 mm 0 cm
Jan. 24 Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /6° 12.5 mm 0 cm
Jan. 25 Sunny
Sunny
 13° /4° 4.5 mm 1.4 cm
Jan. 26 Sunny
Sunny
 13° /4° 0 mm 0 cm
Jan. 27 Sunny
Sunny
 14° /-4° 0 mm 0 cm
Jan. 28 Sunny
Sunny
 16° /1° 0 mm 0 cm
Jan. 29 Mist
Mist
 19° /0° 0 mm 0 cm
Jan. 30 Sunny
Sunny
 15° /3° 0 mm 0 cm
Jan. 31 Sunny
Sunny
 8° /1° 0 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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