Today | Weather | Sunday, December 14, 2025

Weather in Hillsboro, Oregon

09:03 AM
Now
Rainy Weather
46° F
Feels Like 46°
Precipitation 48 %
Wind 4 mph
UV Index (0 - 11+) 0
Humidity 92 %
Today
Rainy Weather
Day 52°
Night 48°
Precipitation 55 %
Wind 4 mph
UV Index (0 - 11+) 0

Hillsboro Weather Forecast Updated

18 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 14, 2024)
Rainy Weather

Day

50°

Night

36°

Wind

6 mph

Precipitation

96 %

Air Quality in Hillsboro

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.69 µg/m³
PM10 5.78 µg/m³
O3 0.036 ppm
NO2 0.8 ppb
SO2 0.1 ppb
CO 0.11 ppm
NH3 0.06 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)
PM2.54.69 µg/m³
PM105.78 µg/m³
O370.08 µg/m³
NO21.42 µg/m³
SO20.23 µg/m³
CO122.51 µg/m³
NH30.06 µg/m³
NO0 µg/m³