National Weather Service Forecast for: Newcastle OK
Issued by: National Weather Service Norman, OK
Updated: 3:37 am CDT Jun 22, 2026
 
Overnight

Overnight: A 50 percent chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 73. East northeast wind around 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Severe
T-Storms

 Monday

Monday: A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 10am, then a chance of showers and thunderstorms after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. North wind 7 to 10 mph becoming east in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Chance
T-storms
 Monday
Night
Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 70. East wind 7 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Showers
Likely

 Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 88. Heat index values as high as 98. South southeast wind 7 to 13 mph, with gusts as high as 20 mph.
Chance
T-storms

 Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Chance
T-storms

 Wednesday

Wednesday: A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.
Chance
T-storms then
Chance
Showers
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Chance
T-storms

 Thursday

Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.
Slight Chance
T-storms

 Thursday
Night
Thursday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Chance
T-storms
Lo 73 °F Hi 84 °F Lo 70 °F Hi 88 °F Lo 73 °F Hi 90 °F Lo 72 °F Hi 90 °F Lo 74 °F

Flood Advisory
 

Overnight
 
 A 50 percent chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 73. East northeast wind around 9 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
 
 A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 10am, then a chance of showers and thunderstorms after 10am. Cloudy, then gradually becoming mostly sunny, with a high near 84. North wind 7 to 10 mph becoming east in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 70. East wind 7 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
 A 40 percent chance of showers and thunderstorms before 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 88. Heat index values as high as 98. South southeast wind 7 to 13 mph, with gusts as high as 20 mph.
Tuesday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Wednesday
 
 A 30 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Thursday
 
 A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 90.
Thursday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Friday
 
 Partly sunny, with a high near 93.
Friday Night
 
 Partly cloudy, with a low around 78.
Saturday
 
 Mostly sunny and hot, with a high near 97. Windy.
Saturday Night
 
 Mostly clear, with a low around 80. Windy.
Sunday
 
 Sunny and hot, with a high near 98. Windy.

 

Forecast from NOAA-NWS for Newcastle OK.