Today | Weather | Tuesday, October 21, 2025

Weather in Baltimore, Maryland

10:08 PM

Now

63° F

Feels Like 59°

Precipitation 46 %

Wind 6 mph

Humidity 75 %

Today

Day 72°

Night 52°

Precipitation 87 %

Wind 6 mph

Baltimore Weather Forecast Updated

12 minutes ago

Last updated on October 21, 2025 9:56 PM

Weather Forecast History

Last Year's Weather on This Day (October 21, 2024)

Day

82°

Night

46°

Wind

4 mph

Precipitation

Air Quality in Baltimore

NOW

41 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 7.58 µg/m³

PM₁₀ 8.35 µg/m³

O₃ 0.044 ppm

NO₂ 2.3 ppb

SO₂ 1 ppb

CO 0.12 ppm

NH₃ 1.28 µg/m³

NO 0 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 – 7.58 µg/m³

PM₁₀ – 8.35 µg/m³

O₃ – 86.81 µg/m³

NO₂ – 4.41 µg/m³

SO₂ – 2.53 µg/m³

CO – 141.9 µg/m³

NH₃ – 1.28 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast