Texas weather is random and unpredicatble. One day it can be cold (and even snowing!) in College Station, and the next day, it can be sunny and warm. However, Texas is mainly hot and humid, especially from April to October. Not surprisingly, this is the perfect time to be out at the pool or getting that nice tan. Although the humidity isn't the most fun thing, students find it tolerable.
It does get a bit cold in the winter, but it's the wind that actually gets you. College Station has also gotten some occasional snow. And when it rains, it causes huge puddles to form, so rain boots come in handy when trying to get through the puddles (or just splashing in them). When the weather is nice and sunny, you can always find students outside, laying on the grass, or taking a nap in their hammocks enjoying Texas' beautiful (if unpredictable) weather.