DALLAS (October 16, 2009)-State Fair of Texas organizers are hoping a big final weekend will ease the pain of rain for the 24-day event.

State Fair spokeswoman Nancy Wiley estimates business is off an average of 20 percent to 25 percent for most vendors at the nation's largest fair.

But it's hard to know how much the economy had to do with the drop-off, Wiley says, because of persistent showers since the fair opened Sept. 25.

A perfect fair weather weekend forecast coupled with the Red River Shootout has both organizers and vendors banking on a rally for the final weekend.

The Texas-Oklahoma game is always a big fair draw but usually falls on a middle weekend.

This year, those 90,000-plus fans will descend on the final weekend, which is always a big hit by itself.

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AP Reports contributed to this story.