Today | Weather | Friday, September 18, 2026

Weather in Orange, California

09:41 AM
Now
Sunny Weather
72° F
Feels Like 77°
Precipitation 7 %
Wind 5 mph
UV Index (0 - 11+) 3
Humidity 64 %
Today
Cloudy Weather
Day 81°
Night 61°
Precipitation 25 %
Wind 7 mph
UV Index (0 - 11+) 7

Orange Weather Forecast Updated

4 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 18, 2025)
Cloudy Night

Day

84°

Night

68°

Wind

5 mph

Precipitation

21 %

Air Quality in Orange

NOW
42 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.41 µg/m³
PM10 10.52 µg/m³
O3 0.045 ppm
NO2 0.2 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 0 µg/m³
NO 0.03 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)
PM2.53.41 µg/m³
PM1010.52 µg/m³
O388.92 µg/m³
NO20.37 µg/m³
SO20.48 µg/m³
CO138.39 µg/m³
NH30 µg/m³
NO0.03 µg/m³