Monthly Historical AveragesMercersburg, PA
Average Temperature
High
18°
Feels 17
Low
6°
Feels 4
Average Precipitation
10 Days
70.7mm
0.1cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastFriday, April 10, 2026
Day
25°Feels 25
Wind
16 km/h S
Gust
24 km/h
Humidity
26%
P.O.P
20%
Night
8°Feels 6
Wind
15 km/h NW
Gust
22 km/h
Humidity
84%
P.O.P
40%
Rain
<1 mm
Historical AveragesApr 10
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity