Mon May 18th, '26 - Daily Weather for San Antonio

Good morning, Alamo City! Here's your weather for Monday, May 18th, 2026, in San Antonio, Texas. - Morning temperature at a cozy 75 degrees - Humidity at 47% with 92% cloud cover and light rain expected (0.2 inches) - Midday temperature rising to 91 degrees with southeast winds at 8 mph, gusting to 15 mph - Evening remains warm at 91 degrees, rain subsides but clouds persist - Overnight temperature drops to a comfortable 78 degrees Have a wonderful day, and join us tomorrow for your weather update!