Covered seating at Yulman Stadium is located primarily on the east side of the stadium in the lower level. Nearly half of all seats in Sections 101-111 are protected by the elements. To stay dry (or for the best chance to stay out of the sun*), choose rows L and higher.
Fans in the 200 level directly above will find that the roofline covers the area behind the seats. As a cheaper alternative to lower level seats, consider tickets at the top of Sections 201-211 where you can escape to cover if needed.
*The sun sets on the other side of the field and will find its way into some of the lower rows on the east side. To ensure yourself protection from the sun, choose rows P-R.