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	County Forecast for Comanche , OK

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181800-
Stephens-
Including the city of Duncan
535 AM CDT Tue Aug 18 2026

...EXTREME HEAT WARNING IN EFFECT FROM 11 AM THIS MORNING TO 8 PM
CDT THIS EVENING...

Today   Sunny, hot with highs around 107. Southwest winds 5 to 10 mph.
Tonight   Mostly clear. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening.
Wednesday   Sunny, hot with highs around 109. 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 109 early in the evening.
Thursday   Sunny, hot with highs around 105. South winds 5 to 10 mph, becoming northwest in the afternoon.
Thursday night   Mostly clear. Lows in the mid 70s.
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.

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Bryce Anderson – DTN Meteorologist

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Front Moving Through Central Plains, Great Lakes Tuesday

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Posted at 5:36AM Tue Aug 18, 2026 CDT

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