The highest AQ index in Pennsylvania (as of 20:00 EDT) is currently the Philadelphia area. Particle Pollution (PM2.5) is measuring at 53 (Moderate). This means air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Over the next few days, the highest Particle Pollution (PM2.5) will be in the Mon Valley Area area. It is forecasted to be Moderate, meaning air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution.
Current Conditions at 4 p.m. EDT this Tuesday afternoon: Mostly sunny skies and drier conditions are in store for the area. Dewpoints drop down slightly as high pressure moves into the region, with temperatures in the low 80s and light northwesterly flow. PM2.5 will be pushed right up, but not over, the threshold for moderate air quality. Here are the forecast details: *** Wednesday’s forecast: Dewpoints continue to lower and little precipitation is within the area from the previous night, bringing some, but very localized, patchy morning fog. Otherwise, a similar sunny day is expected, with scattered showers and storms possible in the evening and temperatures in the low 80s. PM2.5 will finally elevate into the moderate category at this time. *** Extended forecast: The atmosphere is expected to destabilize slightly Wednesday night from a trough forming, however these will only bring showers and potential storms for most of the southern portion of the Commonwealth. Scattered showers and storms are possible throughout the day Thursday, especially come afternoon. Morning fog can also be seen, risking low visibility for early drivers. Showers and storms taper off on Friday, with mostly sunny skies and temperatures in the low 80s expected. However, more showers and storms will quickly come through the region throughout much of the weekend, not seeing a break until the start of the new work week Monday. While Thursday and Friday see PM2.5 still in the moderate range, concentrations could oscillate between high good and low moderate over the weekend dependent on the total rainfall and moisture content coming up.
| Range | 0 - 50 | 51 - 100 | 101 - 150 | 151 - 200 | 201 - 300 | 301 - 500 |
| Color | ||||||
| Category | Good | Moderate | Unhealthy for Sensitive Groups | Unhealthy | Very Unhealthy | Hazardous |
Last Updated 12 minutes ago
Below is a list of counties in Pennsylvania. Click on any county below and you'll get a list of cities where we provide AQ index forecasts.