Currently: 61 °F. Scattered clouds. (Weather station: Allegheny County Airport, USA). See more current weatherAnnual Weather Averages Near Irwin
Averages are for Allegheny County Airport, which is 11 miles from Irwin.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Irwin
High Temp: 83 °F
Low Temp: 22 °F
Mean Temp: 52 °F
Precipitation: 3.53"
Humidity: 68%
Dew Point: 41 °F
Wind: 13 mph
Pressure: 30.06 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Irwin
High Temp: 37 °F
Low Temp: 22 °F
Mean Temp: 30 °F
Precipitation: 3.03"
Humidity: 73%
Dew Point: 22 °F
Wind: 16 mph
Pressure: 30.10 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Irwin
High Temp: 40 °F
Low Temp: 24 °F
Mean Temp: 32 °F
Precipitation: 2.75"
Humidity: 69%
Dew Point: 22 °F
Wind: 15 mph
Pressure: 30.09 "Hg
Visibility: 8 mi
March Climate & Weather Averages in Irwin
High Temp: 50 °F
Low Temp: 31 °F
Mean Temp: 40 °F
Precipitation: 3.36"
Humidity: 63%
Dew Point: 28 °F
Wind: 15 mph
Pressure: 30.08 "Hg
Visibility: 9 mi
April Climate & Weather Averages in Irwin
High Temp: 63 °F
Low Temp: 41 °F
Mean Temp: 52 °F
Precipitation: 3.44"
Humidity: 58%
Dew Point: 37 °F
Wind: 14 mph
Pressure: 29.99 "Hg
Visibility: 10 mi
May Climate & Weather Averages in Irwin
High Temp: 72 °F
Low Temp: 51 °F
Mean Temp: 62 °F
Precipitation: 4.03"
Humidity: 64%
Dew Point: 49 °F
Wind: 12 mph
Pressure: 30.01 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Irwin
High Temp: 80 °F
Low Temp: 60 °F
Mean Temp: 70 °F
Precipitation: 4.66"
Humidity: 69%
Dew Point: 59 °F
Wind: 11 mph
Pressure: 29.98 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Irwin
High Temp: 83 °F
Low Temp: 64 °F
Mean Temp: 74 °F
Precipitation: 4.06"
Humidity: 69%
Dew Point: 62 °F
Wind: 10 mph
Pressure: 30.00 "Hg
Visibility: 9 mi
August Climate & Weather Averages in Irwin
High Temp: 82 °F
Low Temp: 63 °F
Mean Temp: 72 °F
Precipitation: 4.06"
Humidity: 70%
Dew Point: 62 °F
Wind: 9 mph
Pressure: 30.04 "Hg
Visibility: 8 mi
September Climate & Weather Averages in Irwin
High Temp: 76 °F
Low Temp: 56 °F
Mean Temp: 66 °F
Precipitation: 3.40"
Humidity: 71%
Dew Point: 55 °F
Wind: 10 mph
Pressure: 30.07 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Irwin
High Temp: 64 °F
Low Temp: 44 °F
Mean Temp: 54 °F
Precipitation: 3.21"
Humidity: 69%
Dew Point: 44 °F
Wind: 12 mph
Pressure: 30.08 "Hg
Visibility: 9 mi
November Climate & Weather Averages in Irwin
High Temp: 52 °F
Low Temp: 35 °F
Mean Temp: 43 °F
Precipitation: 3.00"
Humidity: 67%
Dew Point: 32 °F
Wind: 14 mph
Pressure: 30.13 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Irwin
High Temp: 41 °F
Low Temp: 27 °F
Mean Temp: 34 °F
Precipitation: 3.33"
Humidity: 72%
Dew Point: 26 °F
Wind: 15 mph
Pressure: 30.12 "Hg
Visibility: 8 mi