Pasadena, TX is
CURRENTLY:MOSTLY SUNNY, TEMP: 96 , Winds: 4 mph, Humidity: 47%.... last few days have been upper 90's and into the 100's. Last night at 8pm it finally got down to 81 and very humid. Can't wait for the cool front. Tomorrow's high is suppose to be 87, and the low is around 68. I better get my jacket out.
When I was a dedicated runner, I ran all (Chicago) winter long. At -30F you get some interesting sweat and breath icicles. Just cover all skin and you're fine. Colder than -20F you probably need goggles too. And don't forget extra shielding for the boys.