Today | Weather | Wednesday, August 12, 2026
Active Weather Warnings

Weather in Fort Smith, Arkansas

06:48 AM
Now
Sunny Weather
81° F
Feels Like 88°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 1
Humidity 80 %
Today
Cloudy Weather
Day 102°
Night 81°
Precipitation 1 %
Wind 9 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Fort Smith Weather Forecast Updated

36 minutes ago
Last updated on

Air Quality in Fort Smith

NOW
20 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.51 µg/m³
PM10 4.65 µg/m³
O3 0.022 ppm
NO2 1.4 ppb
SO2 0.6 ppb
CO 0.09 ppm
NH3 1.25 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.51 µg/m³
PM104.65 µg/m³
O343.37 µg/m³
NO22.55 µg/m³
SO21.62 µg/m³
CO99.04 µg/m³
NH31.25 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Fort Smith

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 11 at 11:47PM CDT until August 14 at 8:00PM CDT by NWS Tulsa OK
Aug 11, 11:47 PM Aug 14, 8:00 PM
WHAT: Heat index values from 105 to 110 each afternoon and
overnight lows from the mid 70s to lower 80s expected.

WHERE: All of northwest and west central Arkansas and east
central, northeast, and southeast Oklahoma.

WHEN: Until 8 PM CDT Friday.

IMPACTS: Heat related illnesses are possible especially impacting
those not acclimated to the conditions or those performing
strenuous activities.
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Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: Aug 12, 6:12 AM Source: NWS Alert