San Antonio weather by month

San Antonio runs from an average daily high of 63°F in January to 96°F in August, with overnight lows between 41°F (January) and 75°F (August).

May is the wettest month (4.4 inches) and February the driest (1.7 inches); about 32 inches fall in a normal year.

Average highs reach 90°F or more in Jun-Sep.

By a simple rule (average highs of 65-88°F, lows of 40°F or more and rain at or under the yearly average), the comfortable months for San Antonio day trips are Feb-Apr and Nov.

Month by month in San Antonio

Month	Average high	Average low	Rain (in)	Day trips open
January	63°F	41°F	2.0	66 of 69
February best	68°F	45°F	1.7	66 of 69
March best	74°F	52°F	2.3	66 of 69
April best	80°F	58°F	2.4	66 of 69
May	87°F	66°F	4.4	69 of 69
June	92°F	73°F	3.3	68 of 69
July	95°F	75°F	2.4	69 of 69
August	96°F	75°F	2.1	69 of 69
September	90°F	70°F	3.9	67 of 69
October	82°F	60°F	3.8	67 of 69
November best	72°F	50°F	2.1	66 of 69
December	65°F	42°F	2.0	65 of 69

The numbers are from NOAA's station at San Antonio Intl Airport, Tx (USW00012921). Climate normals 1991-2020: long-run averages, not a forecast. "Day trips open" counts the places within 3 hours that are open or in season on the 15th, from our own place data.

Questions about San Antonio weather

What is the best time to visit San Antonio?

By a simple rule (average highs of 65-88°F, lows of 40°F or more and rain at or under the yearly average), the comfortable months for San Antonio day trips are Feb-Apr and Nov.

What is the hottest and coldest month in San Antonio?

August is the hottest (average high 96°F) and January the coolest (average low 41°F).

When does it rain the most in San Antonio?

May is the wettest month (4.4 inches) and February the driest (1.7 inches).

Does it snow in San Antonio?

Very little: the station records about 0.2 inches of snow in a normal year.

Where do these weather numbers come from?

The numbers are from NOAA's station at San Antonio Intl Airport, Tx (USW00012921). They are 1991-2020 climate normals (long-run averages), not a forecast. For today's weather use the National Weather Service forecast.