S
M
T
W
T
F
S
30
90°
62°
31
93°
65°
1
95°
72°
2
95°
73°
3
96°
72°
4
96°
72°
5
101°
73°
6
96°
71°
7
89°
65°
8
95°
60°
9
89°
71°
10
81°
65°
11
84°
67°
12
89°
67°
13
91°
70°
14
92°
68°
15
86°
65°
16
82°
64°
17
84°
63°
18
80°
60°
19
74°
53°
20
71°
55°
21
70°
54°
22
78°
53°
23
81°
59°
24
82°
58°
25
82°
59°
26
82°
58°
27
81°
58°
28
81°
57°
29
80°
58°
30
80°
56°
1
79°
53°
2
79°
57°
3
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Terre du Lac
Terre du Lac's September 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 53° and 71°. The average high for September is 82° with an average low of 60°. 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 Terre du Lac. See also: October | November | December.
