National Weather Service Forecast for: Newcastle OK
Issued by: National Weather Service Norman, OK
Updated: 1:44 am CDT Jul 25, 2025
 
Today

Today: Sunny and hot, with a high near 97. Heat index values as high as 104. South southeast wind 7 to 11 mph.
Hot

 Tonight

Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 76. South southeast wind around 10 mph.
Slight Chance
T-storms then
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 96. Heat index values as high as 104. South wind 9 to 11 mph.
Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 75. South southeast wind around 11 mph.
Mostly Clear

 Sunday

Sunday: Sunny, with a high near 96. South wind 9 to 13 mph, with gusts as high as 18 mph.
Sunny

 Sunday
Night
Sunday Night: Partly cloudy, with a low around 77.
Partly Cloudy

 Monday

Monday: Sunny and hot, with a high near 97.
Hot

 Monday
Night
Monday Night: Mostly clear, with a low around 75.
Mostly Clear

 Tuesday

Tuesday: Sunny and hot, with a high near 98.
Hot
Hi 97 °F Lo 76 °F Hi 96 °F Lo 75 °F Hi 96 °F Lo 77 °F Hi 97 °F Lo 75 °F Hi 98 °F

 

Today
 
 Sunny and hot, with a high near 97. Heat index values as high as 104. South southeast wind 7 to 11 mph.
Tonight
 
 A 20 percent chance of showers and thunderstorms before 10pm. Mostly clear, with a low around 76. South southeast wind around 10 mph.
Saturday
 
 Sunny, with a high near 96. Heat index values as high as 104. South wind 9 to 11 mph.
Saturday Night
 
 Mostly clear, with a low around 75. South southeast wind around 11 mph.
Sunday
 
 Sunny, with a high near 96. South wind 9 to 13 mph, with gusts as high as 18 mph.
Sunday Night
 
 Partly cloudy, with a low around 77.
Monday
 
 Sunny and hot, with a high near 97.
Monday Night
 
 Mostly clear, with a low around 75.
Tuesday
 
 Sunny and hot, with a high near 98.
Tuesday Night
 
 Mostly clear, with a low around 75.
Wednesday
 
 Sunny and hot, with a high near 99.
Wednesday Night
 
 Mostly clear, with a low around 74.
Thursday
 
 Mostly sunny, with a high near 95.

 

Forecast from NOAA-NWS for Newcastle OK.