Monthly Historical AveragesUpper Saint Clair, PA
Average Temperature
High
22°
Feels 22
Low
11°
Feels 10
Average Precipitation
12 Days
78.2mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, May 22, 2026
Day
17°Feels 16
Wind
29 km/h E
Gust
44 km/h
Humidity
72%
P.O.P
60%
Rain
1-3 mm
Night
11°Feels 8
Wind
27 km/h E
Gust
41 km/h
Humidity
100%
P.O.P
100%
Rain
15-20 mm
Historical AveragesMay 22
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity