Today | Weather | Thursday, September 4, 2025

Weather in Pittsburgh, Pennsylvania

01:40 PM
Now
Sunny with a Chance of ThunderstormsSunny weather with a possibility of isolated thunderstorms developing later in the day.
72° F
Feels Like 66°
Precipitation 66 %
Wind 15 mph
UV Index (0 - 11+) 11
Humidity 70 %
Today
Stormy WeatherStormy weather, thunderstorms.
Day 72°
Night 57°
Precipitation 97 %
Wind 13 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Pittsburgh Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 4, 2024)

Cloudy WeatherCloudy weather, overcast skies with clouds.

Day

81°

Night

55°

Wind

6 mph

UV Index

7

Precipitation

0

Air quality in Pittsburgh

NOW
45 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 7.86 µg/m³
PM10 13.95 µg/m³
O₃ 30.50 ppb
NO₂ 5.05 ppb
SO₂ 1.48 ppb
CO 136.10 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors