Today | Weather | Tuesday, September 1, 2026

Weather in Waipahu, Hawaii

12:19 AM
Now
Cloudy Night
77° F
Feels Like 79°
Precipitation 2 %
Wind 7 mph
Humidity 77 %
Today
Rainy Weather
Day 91°
Night 73°
Precipitation 65 %
Wind 12 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Waipahu Weather Forecast Updated

37 minutes ago
Last updated on

Air Quality in Waipahu

NOW
17 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.85 µg/m³
PM10 10.3 µg/m³
O3 0.019 ppm
NO2 0.1 ppb
SO2 0.1 ppb
CO 0.08 ppm
NH3 0 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)
PM2.52.85 µg/m³
PM1010.3 µg/m³
O336.32 µg/m³
NO20.21 µg/m³
SO20.2 µg/m³
CO86.66 µg/m³
NH30 µg/m³
NO0 µg/m³