San Antonio is starting Wednesday, August 5, under mostly cloudy skies and muggy air, but the cloud cover will not spare the city from another near-100-degree afternoon. Temperatures are expected to climb from around 79°F early to a high near 99°F, with heat index values reaching 106°F. The forecast carries only a 4% chance of rain and no watches, warnings or advisories.
Clouds Give Way To Afternoon Sun
Morning clouds should thin quickly, with mostly sunny skies taking over by afternoon. South-southeast winds will run 5 to 10 mph, while temperatures rise through the 90s and peak late in the day.
The broader South-Central Texas pattern is expected to remain hot and dry through the next seven days, according to the National Weather Service. A few showers or thunderstorms may develop over the Coastal Plains Thursday and Friday, but San Antonio's rain chances remain in the low single digits.
Hot Nights Keep The Heat Around
Tonight will be mostly clear with a low near 77°F, but it will not feel especially refreshing. Heat index values could reach 107°F early in the night, with southeast winds of 5 to 10 mph and gusts up to 20 mph.
Thursday should bring another mostly sunny afternoon with a high near 98°F and heat index values as high as 106°F. Friday through Monday, highs will stay close to 97°F, with mostly sunny or sunny skies and little chance of rain.
Plan Around The Afternoon Heat
With heat indexes above 100°F, outdoor work and exercise are safest during the early morning or after sunset. Drink water regularly, take cooling breaks and check on older adults, children and pets; never leave anyone in a parked vehicle.
