Today | Weather | Wednesday, March 18, 2026

Weather in Dayton, Ohio

10:58 AM
Now
Snowy Weather
32° F
Feels Like 19°
Precipitation 67 %
Wind 14 mph
UV Index (0 - 11+) 1
Humidity 58 %
Today
Snowy Weather
Day 39°
Night 36°
Precipitation 93 %
Wind 12 mph
UV Index (0 - 11+) 1
Overnight Frost 2 AM – 8 AM

Dayton Weather Forecast Updated

23 seconds ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Sunny Weather

Day

73°

Night

52°

Wind

14 mph

UV Index

5

Precipitation

1 %

Air Quality in Dayton

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.53 µg/m³
PM10 4.44 µg/m³
O3 0.046 ppm
NO2 2.9 ppb
SO2 0.9 ppb
CO 0.15 ppm
NH3 1.12 µg/m³
NO 0.57 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)
PM2.53.53 µg/m³
PM104.44 µg/m³
O391.06 µg/m³
NO25.51 µg/m³
SO22.46 µg/m³
CO167.17 µg/m³
NH31.12 µg/m³
NO0.57 µg/m³