Based on the weather in San Antonio, Texas, United States Of America as of February 6, 2016 12:58am local time

Why? Because it's pretty chilly.
Current Conditions
Partly Cloudy
Temp: 47.3°F8.5°C
Wind: 0.9 MPH1.5 KPH
Precipitation: None

Next 2 hours: Yes

Next 4 hours: Yes

Next 8 hours: Yes