S
M
T
W
T
F
S
30
93°
72°
31
96°
72°
1
98°
72°
2
100°
74°
3
100°
75°
4
101°
75°
5
101°
76°
6
98°
75°
7
90°
72°
8
85°
66°
9
84°
66°
10
82°
70°
11
80°
68°
12
80°
66°
13
85°
68°
14
84°
68°
15
83°
66°
16
82°
64°
17
79°
64°
18
77°
61°
19
75°
58°
20
76°
59°
21
75°
58°
22
79°
63°
23
80°
62°
24
79°
63°
25
80°
62°
26
80°
63°
27
79°
63°
28
80°
62°
29
79°
62°
30
78°
61°
1
78°
61°
2
74°
56°
3
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Walden
Walden's September 2026 forecast shows daily high temperatures ranging from 68° to 85°, with overnight lows between 51° and 70°. The average high for September is 79° with an average low of 63°. 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 Walden. See also: October | November | December.