Most of the festivals tend to really chop off bands’ sets, regardless of how good they are. An hour is pretty good for this type of event. At the upcoming Warped Tour, all acts (huge or just starting out…) get a half hour…period.
I saw Weezer last weekend co-headlining a show with The Pixies, and both bands got their full 1’10" time slot…however, at a few festivals that Weezer has played, they’ve been given like 45 minutes.
Good luck…and enjoy the show.