 Here's your Independence Day weather forecast calling for mostly sunny and hot with a high near 96. Heat index values as high as 103. South-south winds 5 to 7 miles per hour. Tonight mostly clear with a low around 77. South-southwest winds around 3 to 5 miles per hour. And on Friday a 40% chance of showers and thunderstorms mainly after 11 a.m. Mostly sunny and hot with a high near 98. Heat index values as high as 108.