Today | Weather | Wednesday, September 17, 2025
Active Weather Warnings

Weather in Pittsburgh, Pennsylvania

08:39 PM
Now
Cloudy Night
73° F
Feels Like 72°
Precipitation 0 %
Wind 5 mph
Humidity 48 %
Today
Night
Day 82°
Night 57°
Precipitation 1 %
Wind 8

Pittsburgh Weather Forecast Updated

15 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 17, 2024)

Cloudy Weather

Day

82°

Night

63°

Wind

7 mph

UV Index

2

Precipitation

10

Air quality in Pittsburgh

NOW
59 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 14.35 µg/m³
PM10 14.61 µg/m³
O₃ 32.97 ppb
NO₂ 18.27 ppb
SO₂ 2.63 ppb
CO 317.34 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

Weather Alerts and Warnings for Pittsburgh

Air Quality Alert

Air Quality Alert issued September 17 at 4:30PM EDT by NWS Pittsburgh PA
Sep 17, 4:30 PM Sep 18, 4:00 PM
The Pennsylvania Department of Environmental Protection has
issued a code ORANGE air quality alert for Thursday, including
the greater Pittsburgh region, including Allegheny, Butler,
Beaver, Armstrong, Washington, Westmoreland and Fayette counties.

A code ORANGE air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children, the elderly,
and people suffering from asthma, heart disease, or other lung
diseases. The effects of air pollution can be minimized by
avoiding outdoor exercise or strenuous activity.

For more information on ground-level ozone and
fine particles, visit http://www.airnow.gov and
https://www.ahs.dep.pa.gov/AQPartnersWeb/
Updated: Sep 17, 8:23 PM Source: NWS Alert