San Antonio
Texas, USA
Long-term weather forecast
Long-term weather forecast
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January weather forecast and Climate
San Antonio, TX

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Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront
Buildings in San Antonio, Texas, with a calm view of the bridges across the waterfront
January is the coldest month of the year in San Antonio with average temperatures in the 41°F (5°C) to 63°F (17.2°C) range. A few days see highs above 70°F (21.1°C) while some of the nights dip to freezing temperatures around 32°F (0°C) or even below.
January is the cloudiest month of the year, but the rain is light in the region of 1.8" (45.7mm). The sunlight averages about 10 hours a day but the cloud cover means that the monthly sunshine is only around 153 hours.
The period around New Year is one of the best times to visit San Antonio with mild weather and winter festivals - of course, the hotels bump up prices in January.
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  • The average high temperature in January: 16°C

Warmest months (with the highest average high temperature) are July and August (35°C).
The month with the lowest average high temperature is January (16°C).

  • The average low temperature in January: 3°C

Months with the highest average low temperature are July and August (23°C).
The coldest month (with the lowest average low temperature) is January (3°C).

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  • The average rainfall in January: 38mm

The wettest month (with the highest rainfall) is May (94mm).
The driest month (with the lowest rainfall) is March (37mm).

  • The average rainfall days in January: 7 days

The month with the highest number of rainy days is May (8 days).
Months with the lowest number of rainy days are July and August (5 days).

  • The average daylight in January: 11h

Months with the longest days are May, June and July (Average daylight: 14h).
The month with shortest days is December (Average daylight: 10h).

  • The average sunshine in January: 5h

The month with most sunshine is July (Average sunshine: 10h).
Months with least sunshine are January and December (Average sunshine: 5).

  • The average UV index in January: 4

Months with the highest UV index are May, June, July and August (UV index 11).
Months with the lowest UV index are January and December (UV index 4).

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