Annual Weather Averages Near Monongahela
Averages are for Allegheny County Airport, which is 10 miles from Monongahela.
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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 Monongahela
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