San Antonio Weather in January

January in San Antonio brings high temperatures, with daytime highs of 29°C (84°F) and nights around 18°C (64°F). The excellent weather makes it a solid choice for a visit.

Rainfall in San Antonio in January

Rain is expected on roughly 4 days, totalling around 21 mm (0.8 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.

Temperature in San Antonio in January

January tends to be one of the excellent months in San Antonio, with 29°C (84°F) in the afternoon and 18°C (64°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions. This month tends to be the warmest of the year. Light, comfortable clothing will serve you well.

Wind Speed in San Antonio in January

January has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in January

At 18°C (64°F), the water is getting there, comfortable enough for most swimmers, though those used to warmer seas may still find it a touch cool.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February, March, April, September, October, November and December typically offer the best weather for San Antonio.