S
M
T
W
T
F
S
26
86°
68°
27
84°
69°
28
80°
64°
29
81°
60°
30
84°
58°
31
83°
60°
1
72°
68°
2
81°
64°
3
81°
57°
4
83°
58°
5
83°
60°
6
77°
66°
7
84°
64°
8
82°
60°
9
83°
56°
10
86°
67°
11
78°
64°
12
77°
64°
13
77°
63°
14
83°
68°
15
78°
69°
16
82°
72°
17
81°
61°
18
82°
58°
19
84°
62°
20
83°
62°
21
82°
62°
22
80°
63°
23
73°
57°
24
77°
52°
25
80°
51°
26
84°
56°
27
81°
61°
28
83°
53°
29
83°
61°
30
82°
66°
31
87°
69°
1
90°
71°
2
94°
73°
3
94°
72°
4
87°
70°
5
82°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Marcellus
Marcellus's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Marcellus. See also: September | October | November.