Today | Weather | Tuesday, September 23, 2025

Active Weather Warnings

Dense Fog Advisory

Weather in Dayton, Ohio

04:18 AM

Now

66° F

Feels Like 64°

Precipitation 37 %

Wind 8 mph

Humidity 95 %

Today

Day 81°

Night 66°

Precipitation 88 %

Wind 11

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Dayton Weather Forecast Updated

Last updated on September 23, 2025 3:02 AM

Weather Forecast History

Last Year's Weather on This Day (September 23, 2024)

Day

77°

Night

66°

Wind

4 mph

Precipitation

Air quality in Dayton

NOW

55 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 2.08 µg/m³

PM10 2.10 µg/m³

O₃ 40.24 ppb

NO₂ 2.27 ppb

SO₂ 0.81 ppb

CO 178.92 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Dayton

Moderate Expected Likely

Dense Fog Advisory

Dense Fog Advisory issued September 22 at 11:43PM EDT until September 23 at 10:00AM EDT by NWS Wilmington OH

Sep 22, 11:43 PM → Sep 23, 10:00 AM

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

WHERE: Portions of east central and southeast Indiana and
southwest and west central Ohio.

WHEN: Until 10 AM EDT Tuesday.

IMPACTS: Low visibility could make driving conditions hazardous.
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If driving, slow down, use your low-beam headlights, and leave plenty of distance ahead of you.

Updated: Sep 23, 3:02 AM Source: NWS Alert