Weather forecast for: Newcastle OK
Last Update: 6:06 pm CDT Sep 19, 2026
Tonight: Partly cloudy, with a low around 75. South wind 13 to 15 mph, with gusts as high as 22 mph.
Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 95. Heat index values as high as 98. South wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 66. North wind 5 to 8 mph becoming south after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Monday: Mostly sunny, with a high near 86. North wind 8 to 11 mph.
Monday Night: Mostly clear, with a low around 62. North northeast wind around 9 mph.
Tuesday: Mostly sunny, with a high near 83.
Tuesday Night: Partly cloudy, with a low around 59.
Wednesday: Mostly sunny, with a high near 84.
Wednesday Night: Partly cloudy, with a low around 61.
Thursday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 88.
Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Friday: A 30 percent chance of showers. Partly sunny, with a high near 88.
Friday Night: Mostly cloudy, with a low around 67.
Saturday: Partly sunny, with a high near 90.