Threats For Heavy Rain and Severe Thunderstorms Continue in the Plains; Fire Weather Conditions Worsen in the Southwest

On Monday and Tuesday, the focus for heavy rain and severe thunderstorms will continue in the Plains and central Mississippi River Valley. Meanwhile, hot conditions and Critical Fire Weather looms over the Great Basin and Southwest U.S. through midweek. Read More >

Current conditions at

Sherman/Denison, Grayson County Airport (KGYI)

Lat: 33.72°NLon: 96.67°WElev: 748ft.

N/A

Humidity	NA
Wind Speed	NA
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	* Not a current observation *

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Collinsville TX

Tonight
Low: 71 °F
Mostly Cloudy
Monday
High: 91 °F
Decreasing
Clouds
Monday Night
Low: 75 °F
Mostly Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 76 °F
Mostly Clear
Wednesday
High: 93 °F
Mostly Sunny
Wednesday Night
Low: 74 °F
Chance
Showers
Juneteenth
High: 93 °F
Mostly Sunny
Thursday Night
Low: 74 °F
Mostly Clear

Detailed Forecast

Tonight

Mostly cloudy, with a low around 71. South wind around 5 mph becoming calm.

Monday

Mostly cloudy, then gradually becoming sunny, with a high near 91. Heat index values as high as 103. Calm wind becoming southwest around 5 mph in the afternoon.

Monday Night

Mostly clear, with a low around 75. South wind around 5 mph.

Tuesday

Sunny, with a high near 93. Heat index values as high as 103. South wind 5 to 15 mph, with gusts as high as 20 mph.

Tuesday Night

Mostly clear, with a low around 76. South wind 10 to 15 mph, with gusts as high as 20 mph.

Wednesday

Mostly sunny, with a high near 93. South wind around 10 mph, with gusts as high as 20 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 74. South wind around 5 mph.

Juneteenth

Mostly sunny, with a high near 93. South southwest wind around 5 mph.