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

Overnight: Partly cloudy, with a low around 68. East southeast wind around 5 mph.
Partly Cloudy

 Thursday

Thursday: Sunny and hot, with a high near 102. Light and variable wind becoming northwest around 6 mph in the afternoon.
Hot

 Thursday
Night
Thursday Night: Mostly clear, with a low around 68. West wind 5 to 7 mph becoming east southeast in the evening.
Mostly Clear

 Friday

Friday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny and hot, with a high near 100. East southeast wind around 5 mph becoming light and variable.
Mostly Sunny
then Slight
Chance
T-storms
 Friday
Night
Friday Night: A 20 percent chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 67. Light and variable wind becoming southeast around 6 mph.
Slight Chance
T-storms

 Saturday

Saturday: A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 96.
Partly Sunny
then Slight
Chance
T-storms
 Saturday
Night
Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 64.
Chance
T-storms

 Sunday

Sunday: Mostly sunny, with a high near 95.
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 102 °F Lo 68 °F Hi 100 °F Lo 67 °F Hi 96 °F Lo 64 °F Hi 95 °F Lo 63 °F

Heat Advisory
 

Overnight
 
 Partly cloudy, with a low around 68. East southeast wind around 5 mph.
Thursday
 
 Sunny and hot, with a high near 102. Light and variable wind becoming northwest around 6 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 68. West wind 5 to 7 mph becoming east southeast in the evening.
Friday
 
 A 20 percent chance of showers and thunderstorms after noon. Mostly sunny and hot, with a high near 100. East southeast wind around 5 mph becoming light and variable.
Friday Night
 
 A 20 percent chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 67. Light and variable wind becoming southeast around 6 mph.
Saturday
 
 A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 96.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 64.
Sunday
 
 Mostly sunny, with a high near 95.
Sunday Night
 
 A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 63.
Monday
 
 Mostly sunny, with a high near 94.
Monday Night
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Tuesday
 
 Mostly sunny, with a high near 94.
Tuesday Night
 
 Partly cloudy, with a low around 63.
Wednesday
 
 Mostly sunny, with a high near 95.

 

Forecast from NOAA-NWS for Spanish Fork UT.