Today | Weather | Tuesday, September 1, 2026

Active Weather Warnings

Heat Advisory

Weather in Fort Smith, Arkansas

10:24 AM

Now

90° F

Feels Like 99°

Precipitation 0 %

Wind 5 mph

UV Index (0 - 11+) 4

Humidity 53 %

Today

Day 102°

Night 75°

Precipitation 1 %

Wind 6 mph

UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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

10 minutes ago

Last updated on September 01, 2026 at 10:14 AM

Air Quality in Fort Smith

NOW

20 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 4.88 µg/m³

PM₁₀ 6.7 µg/m³

O₃ 0.022 ppm

NO₂ 1.2 ppb

SO₂ 0.6 ppb

CO 0.12 ppm

NH₃ 2.02 µg/m³

NO 0.69 µg/m³

PM_2.5 – 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)

PM_2.5 – 4.88 µg/m³

PM₁₀ – 6.7 µg/m³

O₃ – 43 µg/m³

NO₂ – 2.34 µg/m³

SO₂ – 1.69 µg/m³

CO – 132.07 µg/m³

NH₃ – 2.02 µg/m³

NO – 0.69 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Fort Smith

Moderate Expected Likely

Heat Advisory

Heat Advisory issued August 31 at 11:33PM CDT until September 1 at 8:00PM CDT by NWS Tulsa OK

Sep 1, 12:00 PM → Sep 1, 8:00 PM

WHAT: Heat index values up to 107 expected.

WHERE: In Arkansas, Southern Crawford, Central and Southern
Franklin, and North and Central Sebastian Counties. In Oklahoma,
Mayes, Nowata, Rogers, Southeast Osage, Tulsa, Wagoner, and
Washington OK Counties.

WHEN: From noon to 8 PM CDT Tuesday.

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: Sep 1, 10:14 AM Source: NWS Alert