National Weather Service Forecast for: Lehi UT
Issued by: National Weather Service Salt Lake City, UT
Updated: 12:31 am MDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a low around 68. Light and variable wind.
Mostly Clear

Thursday

Thursday: Sunny and hot, with a high near 101. South southeast wind 5 to 7 mph.
Hot

Thursday
Night
Thursday Night: Mostly clear, with a low around 69. West southwest wind 5 to 7 mph becoming east in the evening.
Mostly Clear

Friday

Friday: A 10 percent chance of showers and thunderstorms after 3pm.  Mostly sunny and hot, with a high near 100. Southeast wind around 7 mph.
Mostly Sunny
then Slight
Chance
T-storms
Friday
Night
Friday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers.  Mostly cloudy, with a low around 67. South southeast wind around 6 mph.  Chance of precipitation is 30%.
Chance
Showers then
Slight Chance
T-storms
Saturday

Saturday: A 20 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 95.
Partly Sunny
then Slight
Chance
T-storms
Saturday
Night
Saturday Night: A 50 percent chance of showers and thunderstorms, mainly before midnight.  Mostly cloudy, with a low around 64.
Chance
T-storms then
Slight Chance
T-storms
Sunday

Sunday: Mostly sunny, with a high near 94.
Mostly Sunny

Sunday
Night
Sunday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 63.
Chance
T-storms then
Mostly Cloudy
Lo 68 °F Hi 101 °F Lo 69 °F Hi 100 °F Lo 67 °F Hi 95 °F Lo 64 °F Hi 94 °F Lo 63 °F

Heat Advisory
 

Overnight
 
Mostly clear, with a low around 68. Light and variable wind.
Thursday
 
Sunny and hot, with a high near 101. South southeast wind 5 to 7 mph.
Thursday Night
 
Mostly clear, with a low around 69. West southwest wind 5 to 7 mph becoming east in the evening.
Friday
 
A 10 percent chance of showers and thunderstorms after 3pm. Mostly sunny and hot, with a high near 100. Southeast wind around 7 mph.
Friday Night
 
A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 67. South southeast wind around 6 mph. Chance of precipitation is 30%.
Saturday
 
A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 95.
Saturday Night
 
A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 64.
Sunday
 
Mostly sunny, with a high near 94.
Sunday Night
 
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63.
Monday
 
Mostly sunny, with a high near 93.
Monday Night
 
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Tuesday
 
Mostly sunny, with a high near 93.
Tuesday Night
 
Partly cloudy, with a low around 63.
Wednesday
 
Mostly sunny, with a high near 94.

 

Forecast from NOAA-NWS for Lehi UT.