National Weather Service Forecast for: Owasso OK
Issued by: National Weather Service Tulsa, OK
Updated: 2:50 am CDT Aug 20, 2026
 
Overnight

Overnight: A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Northeast wind around 5 mph. Chance of precipitation is 20%.
Slight Chance
T-storms

 Thursday

Thursday: Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 108. Northeast wind around 5 mph.
Hot

 Thursday
Night
Thursday Night: A 20 percent chance of showers after 4am. Increasing clouds, with a low around 74. Northeast wind around 5 mph.
Mostly Clear
then Slight
Chance
Showers
 Friday

Friday: A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 102. Heat index values as high as 108. East wind around 5 mph.
Slight Chance
Showers then
Sunny
 Friday
Night
Friday Night: A 20 percent chance of showers. Mostly clear, with a low around 76. East wind around 5 mph.
Slight Chance
Showers

 Saturday

Saturday: A 20 percent chance of showers before 1pm. Mostly sunny and hot, with a high near 100. Southeast wind around 5 mph becoming east in the afternoon.
Slight Chance
Showers

 Saturday
Night
Saturday Night: Mostly clear, with a low around 75. East wind around 10 mph.
Mostly Clear

 Sunday

Sunday: Mostly sunny, with a high near 98. East wind 5 to 10 mph.
Mostly Sunny

 Sunday
Night
Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind around 10 mph.
Slight Chance
T-storms
Lo 75 °F Hi 100 °F Lo 74 °F Hi 102 °F Lo 76 °F Hi 100 °F Lo 75 °F Hi 98 °F Lo 76 °F

Hazardous Weather Outlook
 

Overnight
 
 A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Northeast wind around 5 mph. Chance of precipitation is 20%.
Thursday
 
 Mostly cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 108. Northeast wind around 5 mph.
Thursday Night
 
 A 20 percent chance of showers after 4am. Increasing clouds, with a low around 74. Northeast wind around 5 mph.
Friday
 
 A 10 percent chance of showers before 7am. Mostly sunny and hot, with a high near 102. Heat index values as high as 108. East wind around 5 mph.
Friday Night
 
 A 20 percent chance of showers. Mostly clear, with a low around 76. East wind around 5 mph.
Saturday
 
 A 20 percent chance of showers before 1pm. Mostly sunny and hot, with a high near 100. Southeast wind around 5 mph becoming east in the afternoon.
Saturday Night
 
 Mostly clear, with a low around 75. East wind around 10 mph.
Sunday
 
 Mostly sunny, with a high near 98. East wind 5 to 10 mph.
Sunday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind around 10 mph.
Monday
 
 Mostly sunny and hot, with a high near 100. South wind around 15 mph, with gusts as high as 20 mph.
Monday Night
 
 Mostly clear, with a low around 77. South wind 10 to 15 mph.
Tuesday
 
 Mostly sunny and hot, with a high near 101. East wind around 10 mph.
Tuesday Night
 
 A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. East wind 5 to 10 mph.
Wednesday
 
 A 20 percent chance of showers. Mostly sunny, with a high near 99. North wind 5 to 10 mph.

 

Forecast from NOAA-NWS for Owasso OK.