What is the air quality in Waipahu today?

The current Air Quality Index (AQI) in Waipahu is 18 (Good). PM2.5 concentration is 4.3 µg/m³.

What is the temperature in Waipahu right now?

The current temperature in Waipahu is 26.8°C (feels like 26.8°C). Humidity is 56.8% and wind speed is 55.8 km/h.

Is it safe to go outside in Waipahu?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Waipahu, United States

Drizzle

26.8°C · 56.8% humidity

26.8°

Feels 26.8°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

39h · 1 stn

View full history →

Waipahu's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

56.8%

Humidity

55.8 km/h

Wind ENE

1016.3 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

4.3 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Waipahu?

Temperature & Precipitation

PM2.5 Trend

39h · 1 station

PM2.54.3 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (1 station within 25 km)

4.3

Median

4.3

Average

4.3

Low

4.3

High

PM2.5 µg/m³ · Model: 6.0 · Bias: +1.7

What is the 7-day forecast for Waipahu?

10-20

24.0° 21.4°

3.44 mm

10-21

26.8° 21.6°

0.63 mm

10-22

25.6° 21.2°

3.31 mm

10-23

24.2° 21.7°

1.38 mm

10-24

25.8° 20.6°

2.06 mm

10-25

23.2° 20.5°

1.63 mm

10-26

26.2° 20.6°

10.5 mm

Both models agree Avg diff: 3.5°C

Where are air quality stations near Waipahu?

Kapolei, Hawaii, USA

10.8 km PM2.5: 0.2 µg/m³

Sand Island, Hawaii, USA

17.0 km PM2.5: 5.8 µg/m³

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Sand Island, Hawaii, USA

17.0 km

Sand Island, Hawaii, USA

17.0 km PM2.5: 5.5 µg/m³

Sand Island, Hawaii, USA

17.0 km PM2.5: 4.8 µg/m³

What cities are near Waipahu?

18 Pearl City 18 ‘Ewa Gentry 18 Mililani Town 18 Kapolei 18 Joint Base Pearl Harbor Hickam 18 ‘Ewa Beach 18 Makakilo 18 Makakilo City 18 Airport 18 Aliamanu / Salt Lakes / Foster Village

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-10-20T21:47 UTC.