Monthly Historical AveragesMarietta, PA
Average Temperature
High
23°
Feels 23
Low
12°
Feels 11
Average Precipitation
14 Days
102.2mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastThursday, May 21, 2026
Day
15°Feels 15
Wind
20 km/h NE
Gust
30 km/h
Humidity
77%
P.O.P
90%
Rain
20-25 mm
Night
12°Feels 10
Wind
17 km/h NE
Gust
26 km/h
Humidity
100%
P.O.P
40%
Rain
<1 mm
Historical AveragesMay 21
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity