Today | Weather | Wednesday, March 18, 2026

Weather in Cary, North Carolina

12:21 PM
Now
Cloudy Weather
41° F
Feels Like 48°
Precipitation 20 %
Wind 6 mph
UV Index (0 - 11+) 5
Humidity 35 %
Today
Cloudy Weather
Day 48°
Night 34°
Precipitation 25 %
Wind 6 mph
UV Index (0 - 11+) 6

Cary Weather Forecast Updated

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

Day

68°

Night

43°

Wind

6 mph

UV Index

6

Precipitation

0 %

Air Quality in Cary

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.9 µg/m³
PM10 3.14 µg/m³
O3 0.050 ppm
NO2 1 ppb
SO2 0.5 ppb
CO 0.14 ppm
NH3 1.53 µg/m³
NO 0.65 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)
PM2.51.9 µg/m³
PM103.14 µg/m³
O398.79 µg/m³
NO21.96 µg/m³
SO21.29 µg/m³
CO157.57 µg/m³
NH31.53 µg/m³
NO0.65 µg/m³