S
M
T
W
T
F
S
30
76°
67°
31
87°
71°
1
87°
74°
2
94°
73°
3
94°
70°
4
80°
69°
5
80°
64°
6
78°
60°
7
80°
58°
8
86°
70°
9
88°
66°
10
78°
57°
11
79°
58°
12
85°
63°
13
83°
64°
14
80°
65°
15
80°
61°
16
74°
56°
17
72°
55°
18
69°
52°
19
69°
50°
20
72°
53°
21
71°
52°
22
70°
57°
23
72°
57°
24
76°
56°
25
78°
58°
26
78°
56°
27
76°
56°
28
78°
58°
29
78°
58°
30
77°
57°
1
78°
56°
2
74°
49°
3
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tiffin
Tiffin's September 2026 forecast shows daily high temperatures ranging from 64° to 88°, with overnight lows between 46° and 70°. The average high for September is 76° 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 Tiffin. See also: October | November | December.
