S
M
T
W
T
F
S
31
95°
55°
1
94°
58°
2
94°
59°
3
86°
59°
4
91°
53°
5
90°
60°
6
91°
57°
7
87°
49°
8
84°
48°
9
79°
53°
10
74°
54°
11
76°
45°
12
77°
51°
13
81°
48°
14
86°
54°
15
84°
47°
16
86°
45°
17
89°
48°
18
84°
50°
19
81°
64°
20
85°
55°
21
85°
54°
22
83°
52°
23
84°
42°
24
89°
43°
25
83°
52°
26
85°
49°
27
85°
44°
28
85°
55°
29
80°
56°
30
73°
49°
1
76°
43°
2
80°
47°
3
61°
50°
4
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fallon
Fallon's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Fallon. See also: October | November | December.