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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. 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 36%
Wind Speed S 6 mph
Barometer 29.90 in (1011.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Sep 8:53 pm CDT
Extended Forecast for

Charleston AR

  • Tonight

    Tonight: Mostly clear, with a low around 71. South wind around 5 mph.

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 99. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon.

    High: 99 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 71. South wind around 5 mph becoming calm in the evening.

    Low: 71 °F

    Chance
    T-storms

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 93. Light west wind increasing to 5 to 10 mph in the afternoon.

    High: 93 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 67. North wind around 5 mph.

    Low: 67 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. North wind around 5 mph.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61. Northeast wind 5 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Northeast wind around 5 mph.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. East wind around 5 mph.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 71. South wind around 5 mph.
Sunday
Mostly sunny, with a high near 99. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 71. South wind around 5 mph becoming calm in the evening.
Monday
A 30 percent chance of showers and thunderstorms. Mostly cloudy, then gradually becoming sunny, with a high near 93. Light west wind increasing to 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 67. North wind around 5 mph.
Tuesday
Mostly sunny, with a high near 89. North wind around 5 mph.
Tuesday Night
Mostly clear, with a low around 61. Northeast wind 5 to 10 mph.
Wednesday
Sunny, with a high near 88. Northeast wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 61. East wind around 5 mph.
Thursday
Mostly sunny, with a high near 89. East wind around 5 mph.
Thursday Night
Partly cloudy, with a low around 63. East wind around 5 mph.
Friday
Partly sunny, with a high near 89. East wind around 5 mph.
Friday Night
Mostly cloudy, with a low around 64. East wind around 5 mph.
Saturday
Partly sunny, with a high near 89. East wind around 5 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charleston AR
 35.29°N 94.04°W
Last Update:
10:50 pm CDT Sep 19, 2026
Forecast Valid:
11pm CDT Sep 19, 2026-6pm CDT Sep 26, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation