Today | Weather | Wednesday, March 4, 2026

Active Weather Warnings

Dense Fog Advisory

Weather in Charleston, South Carolina

08:43 AM

Now

57° F

Feels Like 61°

Precipitation 33 %

Wind 6 mph

UV Index (0 - 11+) 2

Humidity 90 %

Today

Day 72°

Night 54°

Precipitation 40 %

Wind 7 mph

UV Index (0 - 11+) 5

Charleston Weather Forecast Updated

9 minutes ago

Last updated on March 04, 2026 at 8:34 AM

Weather Forecast History

Last Year's Weather on This Day (March 4, 2025)

Day

63°

Night

61°

Wind

11 mph

UV Index

Precipitation

49 %

Air Quality in Charleston

NOW

33 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.27 µg/m³

PM₁₀ 6.65 µg/m³

O₃ 0.036 ppm

NO₂ 1.3 ppb

SO₂ 0.1 ppb

CO 0.13 ppm

NH₃ 0.04 µg/m³

NO 0.36 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 – 3.27 µg/m³

PM₁₀ – 6.65 µg/m³

O₃ – 70.28 µg/m³

NO₂ – 2.5 µg/m³

SO₂ – 0.39 µg/m³

CO – 145.09 µg/m³

NH₃ – 0.04 µg/m³

NO – 0.36 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Charleston

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued March 4 at 4:21AM EST until March 4 at 9:00AM EST by NWS Charleston SC

Mar 4, 4:21 AM → Mar 4, 9:00 AM

WHAT: Visibility one quarter mile or less in dense fog.

WHERE: Portions of southeast Georgia and southeast South Carolina.

WHEN: Until 9 AM EST this morning.

IMPACTS: Low visibility could make driving conditions hazardous.

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If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Updated: Mar 4, 8:34 AM Source: NWS Alert