The conditions have prevented fire crews from making containment lines around the blaze, which grew overnight to 108 square miles, up from 100 on Saturday.
No structures have been lost in the fire, and no injuries have been reported.
Officials say the fire burning near South Fork is the largest the region has seen. They say it is doubtful fire crews could establish any containment lines until there’s a break in the weather, possibly Tuesday.
Officials remain optimistic they can protect the town, however.
The blaze’s rapid advance Friday prompted the evacuation of hundreds of visitors and the town’s 400 permanent residents.