S
M
T
W
T
F
S
30
76°
65°
31
89°
69°
1
90°
62°
2
86°
64°
3
82°
64°
4
84°
71°
5
83°
65°
6
84°
56°
7
82°
56°
8
79°
64°
9
84°
58°
10
79°
48°
11
84°
47°
12
77°
55°
13
71°
40°
14
70°
34°
15
74°
49°
16
75°
41°
17
73°
53°
18
63°
49°
19
63°
57°
20
67°
47°
21
67°
44°
22
68°
40°
23
72°
35°
24
72°
38°
25
77°
50°
26
72°
41°
27
71°
43°
28
79°
49°
29
77°
49°
30
75°
64°
1
71°
50°
2
66°
33°
3
68°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Merrill
Merrill's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September 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 September weather will actually feel in Merrill. See also: October | November | December.
