Today | Weather | Friday, December 5, 2025

Active Weather Warnings

Winter Weather Advisory

Weather in Rockville, Maryland

08:03 PM

Now

30° F

Feels Like 30°

Precipitation 45 %

Wind 4 mph

Humidity 85 %

Today

Day 30°

Night 27°

Precipitation 90 %

Wind 4 mph

UV Index (0 - 11+) 1

Rockville Weather Forecast Updated

Air Quality in Rockville

NOW

25 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 6.07 µg/m³

PM₁₀ 7.7 µg/m³

O₃ 0.020 ppm

NO₂ 11 ppb

SO₂ 0.6 ppb

CO 0.21 ppm

NH₃ 0.78 µg/m³

NO 0.01 µg/m³

PM_2.5 – 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)

PM_2.5 – 6.07 µg/m³

PM₁₀ – 7.7 µg/m³

O₃ – 39.89 µg/m³

NO₂ – 20.73 µg/m³

SO₂ – 1.45 µg/m³

CO – 241.3 µg/m³

NH₃ – 0.78 µg/m³

NO – 0.01 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Rockville

Moderate Expected Likely

Winter Weather Advisory

Winter Weather Advisory issued December 5 at 12:48PM EST until December 6 at 1:00AM EST by NWS Baltimore MD/Washington DC

Dec 5, 7:00 PM → Dec 6, 1:00 AM

WHAT: Light freezing rain and drizzle, with a light glaze of ice
expected.

WHERE: Washington DC, and portions of central, northern, and
southern Maryland, and central and northern Virginia.

WHEN: From 7 PM this evening to 1 AM EST Saturday.

IMPACTS: Very slippery sidewalks, roads and bridges are possible.

ADDITIONAL DETAILS: In addition to light freezing rain, drizzle
and fog, any melted snow will refreeze as temperatures drop back
into the 20s.

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Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Updated: Dec 5, 7:04 PM Source: NWS Alert