Today | Weather | Tuesday, September 8, 2026

Active Weather Warnings

Weather in Fort Smith, Arkansas

05:19 AM

Now

79° F

Feels Like 81°

Precipitation 47 %

Wind 7 mph

Humidity 68 %

Today

Day 106°

Night 77°

Precipitation 1 %

Wind 6 mph

UV Index (0 - 11+) 7

Fort Smith Weather Forecast Updated

25 minutes ago

Last updated on September 08, 2026 at 4:54 AM

Air Quality in Fort Smith

NOW

31 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 7.33 µg/m³

PM₁₀ 9.13 µg/m³

O₃ 0.027 ppm

NO₂ 1.1 ppb

SO₂ 0.4 ppb

CO 0.11 ppm

NH₃ 3.13 µg/m³

NO 0 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 – 7.33 µg/m³

PM₁₀ – 9.13 µg/m³

O₃ – 52.25 µg/m³

NO₂ – 2.06 µg/m³

SO₂ – 0.92 µg/m³

CO – 121.57 µg/m³

NH₃ – 3.13 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Fort Smith

Severe Expected Likely

Extreme Heat Warning

Extreme Heat Warning issued September 7 at 11:46PM CDT until September 8 at 8:00PM CDT by NWS Tulsa OK

Sep 8, 12:00 PM → Sep 8, 8:00 PM

WHAT: Dangerously hot conditions with heat index values up to 112
expected.

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

WHEN: From noon to 8 PM CDT Tuesday.

IMPACTS: Heat related illnesses increase significantly during
extreme heat and high humidity events.

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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Updated: Sep 8, 4:54 AM Source: NWS Alert

Moderate Expected Likely

Heat Advisory

Heat Advisory issued September 7 at 7:02PM CDT until September 8 at 7:00PM CDT by NWS Tulsa OK

Sep 8, 12:00 PM → Sep 8, 7:00 PM

WHAT: Heat index values up to 109 expected.

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

WHEN: From noon to 7 PM CDT Tuesday.

IMPACTS: Heat related illnesses are possible especially impacting
those not acclimated to the conditions or those performing
strenuous activities.