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	County Forecast for Comanche , OK

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190600-
Stephens-
Including the city of Duncan
535 PM CDT Tue Aug 18 2026

..extreme heat warning in effect until 8 pm cdt this evening    ...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY...
Tonight   Clear. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 106 early this evening.
Wednesday   Sunny, hot with highs around 107. Southwest winds around 10 mph.
Wednesday night   Mostly clear. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 108 early in the evening.
Thursday   Sunny, hot with highs around 106. Southwest winds 5 to 10 mph, becoming north in the afternoon.
Thursday night   Mostly clear. Lows in the mid 70s. East winds 5 to 10 mph. Heat index values up to 106 early in the evening.
Friday   Sunny, hot with highs 100 to 105.
Friday night   Mostly clear. Lows in the mid 70s.
Saturday   Sunny, hot with highs around 105.
Saturday night   Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening.
Sunday   Sunny, hot with highs 105 to 110.
Sunday night   Mostly clear. Lows in the upper 70s. Heat index values up to 105 early in the evening.
Monday   Sunny, hot with highs 105 to 110.
Monday night   Mostly clear. Lows in the upper 70s. Heat index values up to 105 early in the evening.
Tuesday   Sunny, hot with highs around 105.

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Bryce Anderson – DTN Meteorologist

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Front Continues to Push Through Corn Belt Wednesday

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Posted at 11:59AM Tue Aug 18, 2026 CDT

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