Today | Weather | Wednesday, March 18, 2026

Weather in Cincinnati, Ohio

05:46 AM
Now
Cloudy Weather
23° F
Feels Like 18°
Precipitation 7 %
Wind 7 mph
Humidity 65 %
Today
Snowy Weather
Day 41°
Night 34°
Precipitation 58 %
Wind 10 mph
UV Index (0 - 11+) 2
Overnight Frost 1 AM – 5 AM

Cincinnati Weather Forecast Updated

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

Day

77°

Night

52°

Wind

12 mph

UV Index

5

Precipitation

1 %

Air Quality in Cincinnati

NOW
43 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.98 µg/m³
PM10 4.54 µg/m³
O3 0.047 ppm
NO2 1.4 ppb
SO2 1 ppb
CO 0.14 ppm
NH3 1.36 µg/m³
NO 0 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)
PM2.53.98 µg/m³
PM104.54 µg/m³
O391.85 µg/m³
NO22.7 µg/m³
SO22.7 µg/m³
CO165.16 µg/m³
NH31.36 µg/m³
NO0 µg/m³