TODAY NOV21
TEMPERATURE36
HUMIDITY85
PRESSURE100169.38
WIND COND.230 11.1
  • 4337Fri100%80%
  • 4637Sat90%40%
  • 4836Sun
  • 5537Mon30%80%
  • 4631Tue70%
daynightWeather update from Pittsburgh - Allegheny County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Irwin for July is 73.5 degrees
  • The lowest monthly average temperature in Irwin for January is 29.7 degrees
  • The most monthly precipitation in Irwin occurs in July with 5.1 inches
  • The air quality index in Irwin is 33% worse than the national average
  • The pollution index in Irwin is 166% worse than the national average

Compare Irwin, PA Weather

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      Irwin Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January22°F38°F30°F3.2"
      February23°F39°F30°F2.2"
      March32°F52°F41°F3.4"
      April43°F65°F53°F3.4"
      May52°F74°F62°F4.2"
      June60°F81°F70°F5.1"
      July64°F84°F73°F5.1"
      August63°F82°F72°F4.1"
      September56°F77°F66°F3.1"
      October46°F65°F54°F3.8"
      November35°F54°F44°F2.8"
      December28°F43°F35°F3.7"

      Irwin air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexIrwinPennsylvaniaNational
      Air quality index564542
      Pollution index7,262,6904,584,8052,726,193

      Irwin air quality

      MeasurementTotal
      Days measured365
      Days with good air quality129
      Days with moderate air quality220
      Days w/ poor A.Q. for sensitive groups12
      Days with unhealthy air quality4

      Air quality details

      PollutantTotal
      Arsenic0.030%
      Benzene0.090%
      Carbon Tetrachloride0.260%
      Lead0.140%
      Mercury0.030%

      Average monthly Irwin temperature with heat index

      Irwin monthly precipitation with daily maximum

      Irwin monthly snow depth with daily maximum

      Irwin monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Mount Pleasant, PA4,2553628.0%
      Mammoth, PA4283628.0%
      Calumet, PA1,4153628.0%
      Bear Rocks, PA1,1743628.0%
      Norvelt, PA8623628.0%
      Irwin, PA3,7735612.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bright, NB3,772n/a 
      Nellis AFB, NV3,770548.0%
      Larch Way, WA3,7704510.0%
      Bayshore, NC3,7763432.0%
      Mountain View, NC3,7764314.0%
      Irwin, PA3,7735612.0%
      Source: The Irwin, PA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.