S
M
T
W
T
F
S
30
82°
51°
31
86°
50°
1
77°
60°
2
70°
54°
3
72°
52°
4
70°
52°
5
77°
45°
6
77°
46°
7
79°
45°
8
86°
50°
9
93°
57°
10
89°
55°
11
88°
51°
12
80°
44°
13
74°
42°
14
78°
46°
15
82°
49°
16
80°
51°
17
81°
49°
18
84°
50°
19
81°
49°
20
82°
50°
21
79°
46°
22
73°
46°
23
73°
47°
24
76°
47°
25
77°
46°
26
75°
45°
27
75°
48°
28
79°
48°
29
76°
46°
30
69°
44°
1
73°
46°
2
77°
46°
3
78°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Carson City
Carson City's September 2026 forecast shows daily high temperatures ranging from 69° to 93°, with overnight lows between 42° and 57°. The average high for September is 79° with an average low of 48°. 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 Carson City. See also: October | November | December.