San Antonio weather in May 2025

The weather in San Antonio in May is hot. The average temperatures are between 20°C and 31°C.

You can expect about 3 to 8 days of rain in San Antonio during the month of May. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in San Antonio in May 2025.

If you’re planning to visit San Antonio in the near future, we highly recommend that you review the 14 day weather forecast for San Antonio before you arrive.

Temperatures

31° / 20°

Rainy Days

Snowy Days

Dry Days

Rainfall

115

Sun Hours

9.1

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
				1 29° /18°	2 29° /19°	3 31° /20°
4 30° /21°	5 31° /20°	6 31° /20°	7 32° /20°	8 33° /21°	9 33° /20°	10 29° /19°
11 29° /19°	12 29° /19°	13 29° /18°	14 31° /19°	15 31° /19°	16 30° /20°	17 33° /21°
18 34° /22°	19 33° /21°	20 33° /21°	21 32° /22°	22 31° /21°	23 32° /22°	24 32° /22°
25 31° /21°	26 32° /21°	27 34° /21°	28 32° /21°	29 32° /22°	30 32° /21°	31 32° /22°

Explore the weather in San Antonio in other months

San Antonio annual weather

Month	Temperatures	Rainy Days	Dry Days	Rainfall	Weather	More details
January	17° / 8°	2	29	38 mm	Good	San Antonio in January
February	19° / 9°	2	26	32 mm	Good	San Antonio in February
March	23° / 13°	3	28	46 mm	Perfect	San Antonio in March
April	27° / 16°	5	25	68 mm	Perfect	San Antonio in April
May	31° / 20°	7	24	115 mm	Ok	San Antonio in May
June	34° / 23°	5	25	90 mm	Ok	San Antonio in June
July	35° / 24°	4	27	69 mm	Ok	San Antonio in July
August	36° / 25°	2	29	54 mm	Ok	San Antonio in August
September	32° / 23°	7	23	142 mm	Ok	San Antonio in September
October	28° / 18°	3	28	58 mm	Perfect	San Antonio in October
November	22° / 13°	2	28	40 mm	Good	San Antonio in November
December	18° / 9°	3	28	42 mm	Good	San Antonio in December