National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Fair

88°F

31°C

Humidity 52%
Wind Speed Calm
Barometer 29.93 in (1013.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 27 Aug 7:53 pm CDT
Extended Forecast for

Mountainburg AR

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 69. Calm wind becoming northeast around 5 mph after midnight.

    Low: 69 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 92. Northeast wind around 5 mph becoming calm.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. East wind around 5 mph.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 93. Southeast wind around 5 mph.

    High: 93 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70. Southeast wind around 5 mph.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 96. South wind around 5 mph.

    High: 96 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 72. Southeast wind around 5 mph.

    Low: 72 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 96. Southeast wind around 5 mph becoming south in the afternoon.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73. Southeast wind 5 to 10 mph becoming light in the evening.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 69. Calm wind becoming northeast around 5 mph after midnight.
Friday
Sunny, with a high near 92. Northeast wind around 5 mph becoming calm.
Friday Night
Mostly clear, with a low around 68. East wind around 5 mph.
Saturday
Sunny, with a high near 93. Southeast wind around 5 mph.
Saturday Night
Mostly clear, with a low around 70. Southeast wind around 5 mph.
Sunday
Sunny, with a high near 96. South wind around 5 mph.
Sunday Night
Clear, with a low around 72. Southeast wind around 5 mph.
Monday
Sunny, with a high near 96. Southeast wind around 5 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 73. Southeast wind 5 to 10 mph becoming light in the evening.
Tuesday
Sunny, with a high near 95. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 74. Southeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 96. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 75. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 98. Calm wind becoming southwest around 5 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mountainburg AR
 35.63°N 94.17°W
Last Update:
7:50 pm CDT Aug 27, 2026
Forecast Valid:
8pm CDT Aug 27, 2026-6pm CDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

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