Today | Weather | Thursday, May 21, 2026

Active Weather Warnings

Air Quality Alert

Weather in Greensboro, North Carolina

01:06 AM

Now

75° F

Feels Like 73°

Precipitation 0 %

Wind 6 mph

Humidity 65 %

Today

Day 90°

Night 61°

Precipitation 86 %

Wind 7 mph

UV Index (0 - 11+) 6

Greensboro Weather Forecast Updated

7 minutes ago

Last updated on May 21, 2026 at 12:59 AM

Weather Forecast History

Last Year's Weather on This Day (May 21, 2025)

Day

84°

Night

59°

Wind

8 mph

UV Index

Precipitation

40 %

Air Quality in Greensboro

NOW

29 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 3.03 µg/m³

PM₁₀ 4.82 µg/m³

O₃ 0.032 ppm

NO₂ 1.1 ppb

SO₂ 0.9 ppb

CO 0.09 ppm

NH₃ 1.89 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 – 3.03 µg/m³

PM₁₀ – 4.82 µg/m³

O₃ – 61.86 µg/m³

NO₂ – 2.02 µg/m³

SO₂ – 2.44 µg/m³

CO – 106.41 µg/m³

NH₃ – 1.89 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Greensboro

Air Quality Alert

Air Quality Alert issued May 19 at 3:44PM EDT by NWS Raleigh NC

May 19, 3:44 PM → May 21, 1:00 AM

The Forsyth County Office of Environmental Assistance and Protection
in Winston Salem NC has issued a Code Orange Air Quality Action Day
for Ground Level Ozone, until midnight EDT Wednesday night.

An Air Quality Action Day means that Ground Level Ozone
concentrations within the region may approach or exceed unhealthy
standards. For additional information, please visit the Forsyth
County Office of Environmental Assistance and Protection at
www.forsyth.cc/EAP/dailyforecast.aspx

Updated: May 21, 12:59 AM Source: NWS Alert