S
M
T
W
T
F
S
30
80°
63°
31
88°
71°
1
88°
73°
2
93°
71°
3
95°
71°
4
86°
69°
5
80°
58°
6
80°
57°
7
83°
59°
8
86°
67°
9
89°
65°
10
75°
56°
11
77°
56°
12
83°
59°
13
83°
60°
14
77°
54°
15
79°
54°
16
79°
55°
17
81°
52°
18
74°
57°
19
80°
57°
20
78°
56°
21
78°
57°
22
77°
55°
23
74°
53°
24
71°
54°
25
77°
55°
26
75°
52°
27
67°
47°
28
66°
46°
29
65°
46°
30
65°
44°
1
64°
43°
2
64°
50°
3
70°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Upper Sandusky
Upper Sandusky's September 2026 forecast shows daily high temperatures ranging from 64° to 89°, with overnight lows between 43° and 69°. The average high for September is 76° with an average low of 55°. 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 Upper Sandusky. See also: October | November | December.
