S
M
T
W
T
F
S
30
81°
57°
31
77°
54°
1
75°
58°
2
75°
59°
3
80°
51°
4
75°
55°
5
75°
60°
6
78°
58°
7
83°
59°
8
82°
58°
9
81°
57°
10
79°
56°
11
74°
56°
12
73°
58°
13
81°
55°
14
80°
55°
15
Hist. Avg.
75°
51°
16
Hist. Avg.
75°
51°
17
Hist. Avg.
74°
50°
18
Hist. Avg.
74°
50°
19
Hist. Avg.
74°
50°
20
Hist. Avg.
73°
49°
21
Hist. Avg.
73°
49°
22
Hist. Avg.
72°
48°
23
Hist. Avg.
72°
48°
24
Hist. Avg.
72°
47°
25
Hist. Avg.
71°
47°
26
Hist. Avg.
71°
46°
27
Hist. Avg.
70°
46°
28
Hist. Avg.
70°
46°
29
Hist. Avg.
69°
45°
30
Hist. Avg.
69°
45°
1
Hist. Avg.
68°
44°
2
Hist. Avg.
68°
44°
3
Hist. Avg.
68°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Marcellus
Marcellus's September 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 51° and 60°. The average high for September is 78° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Marcellus. See also: October | November | December.
