Today | Weather | Friday, September 18, 2026

Weather in Washington, District of Columbia

07:00 PM
Now
Cloudy Weather
81° F
Feels Like 82°
Precipitation 22 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 69 %
Today
Partly Sunny with Showers
Day 88°
Night 66°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 4

Washington Weather Forecast Updated

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

Day

84°

Night

61°

Wind

5 mph

Precipitation

1 %

Air Quality in Washington

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.93 µg/m³
PM10 7.2 µg/m³
O3 0.044 ppm
NO2 1.9 ppb
SO2 0.2 ppb
CO 0.15 ppm
NH3 0.3 µg/m³
NO 0.05 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)
PM2.56.93 µg/m³
PM107.2 µg/m³
O386.11 µg/m³
NO23.5 µg/m³
SO20.62 µg/m³
CO172.79 µg/m³
NH30.3 µg/m³
NO0.05 µg/m³