Today | Weather | Monday, September 21, 2026

Weather in Redmond, Washington

11:53 AM
Now
Cloudy Weather
61° F
Feels Like 66°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3
Humidity 81 %
Today
Cloudy Weather
Day 70°
Night 54°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3

Redmond Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Partly Sunny with Showers

Day

70°

Night

57°

Wind

7 mph

UV Index

40

Precipitation

70 %

Air Quality in Redmond

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.95 µg/m³
PM10 7.68 µg/m³
O3 0.033 ppm
NO2 1.9 ppb
SO2 0.6 ppb
CO 0.12 ppm
NH3 0.32 µg/m³
NO 0.56 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)
PM2.55.95 µg/m³
PM107.68 µg/m³
O365.61 µg/m³
NO23.52 µg/m³
SO21.52 µg/m³
CO142.97 µg/m³
NH30.32 µg/m³
NO0.56 µg/m³