S
M
T
W
T
F
S
30
88°
61°
31
85°
66°
1
84°
58°
2
86°
59°
3
87°
59°
4
93°
60°
5
90°
62°
6
91°
63°
7
94°
69°
8
92°
65°
9
75°
61°
10
73°
56°
11
77°
50°
12
80°
51°
13
82°
51°
14
87°
57°
15
88°
58°
16
76°
61°
17
75°
51°
18
76°
53°
19
80°
50°
20
83°
55°
21
81°
55°
22
79°
54°
23
N/A
24
N/A
25
82°
46°
26
86°
49°
27
88°
53°
28
86°
53°
29
88°
55°
30
85°
57°
1
80°
57°
2
76°
54°
3
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sassenage
Sassenage's September 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 46° and 57°. The average high for September is 83° with an average low of 53°. 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 Sassenage. See also: October | November | December.
