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National Weather Service Forecast for: Allen TX
Issued by: National Weather Service Dallas/Fort Worth, TX
Updated: 11:16 pm CDT Aug 9, 2026

Allen
 
Overnight

Overnight: Clear, with a low around 78. South wind around 10 mph, with gusts as high as 20 mph.
Low: 78 °F		 Monday

Monday: Sunny and hot, with a high near 99. Heat index values as high as 104. South southeast wind around 10 mph, with gusts as high as 20 mph.
High: 99 °F		 Monday
Night
Monday Night: Clear, with a low around 79. South southeast wind 10 to 15 mph.
Low: 79 °F		 Tuesday

Tuesday: Sunny, with a high near 98. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 20 mph.
High: 98 °F		 Tuesday
Night
Tuesday Night: Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 20 mph.
Low: 81 °F		 Wednesday

Wednesday: Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.
High: 101 °F		 Wednesday
Night
Wednesday Night: Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 25 mph.
Low: 81 °F		 Thursday

Thursday: Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 25 mph.
High: 101 °F		 Thursday
Night
Thursday Night: Clear, with a low around 79. South wind around 15 mph, with gusts as high as 25 mph.
Low: 79 °F
Clear
 Hot
 Clear
 Sunny
 Clear
 Hot
 Clear
 Hot
 Clear

 

Overnight
 
 Clear, with a low around 78. South wind around 10 mph, with gusts as high as 20 mph.
Monday
 
 Sunny and hot, with a high near 99. Heat index values as high as 104. South southeast wind around 10 mph, with gusts as high as 20 mph.
Monday Night
 
 Clear, with a low around 79. South southeast wind 10 to 15 mph.
Tuesday
 
 Sunny, with a high near 98. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
 
 Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 20 mph.
Wednesday Night
 
 Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
 
 Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 25 mph.
Thursday Night
 
 Clear, with a low around 79. South wind around 15 mph, with gusts as high as 25 mph.
Friday
 
 Sunny and hot, with a high near 100.
Friday Night
 
 Clear, with a low around 80.
Saturday
 
 Sunny and hot, with a high near 100.
Saturday Night
 
 Clear, with a low around 80.
Sunday
 
 Sunny and hot, with a high near 100.

 

Forecast from NOAA-NWS for Allen TX.