Picked a great day to go to the MN State Fair; 99 degrees. Minnesota / Photos / Thrillify / Weather 25 Aug, 2013 0 I love the Minnesota State fair, but I could do without the 99 degree temp. The only way around it is to go early, enjoy what we can, and lave before it actually hits 99; or higher. Heat wave or not, it’s going to be a great time. Related Tags: State Fair