It won't seem like autumn over the next few days!
High pressure will keep it sunny with a gradual warming trend through Tuesday. Temperatures in Southern Utah will be about 5-10 degrees above average and in the north it'll be about 10-15 degrees above normal!
Moisture moving back into Southern Utah will bring a chance of isolated showers & thunderstorms over the mountains on Tuesday. They'll become more likely across Central & Southern Utah on Wednesday. Showers are most likely across the north on Thursday.
SALT LAKE CITY
Monday: Sunny & warm. Highs: Mid 80s.
Monday Night: Clear. Lows: Near 60
ST. GEORGE
Monday: Sunny. Highs: Mid 90s.
Monday Night: Mostly clear. Lows: Upper 60s.