S
M
T
W
T
F
S
30
80°
54°
31
81°
58°
1
80°
58°
2
80°
51°
3
79°
48°
4
72°
48°
5
72°
55°
6
74°
56°
7
79°
50°
8
72°
48°
9
71°
50°
10
72°
55°
11
71°
56°
12
79°
56°
13
78°
54°
14
78°
53°
15
77°
47°
16
72°
52°
17
68°
45°
18
71°
44°
19
68°
43°
20
66°
41°
21
64°
43°
22
66°
50°
23
67°
43°
24
67°
42°
25
66°
50°
26
69°
49°
27
70°
50°
28
73°
47°
29
72°
43°
30
67°
44°
1
64°
46°
2
70°
46°
3
63°
39°
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 63° to 81°, with overnight lows between 39° and 58°. The average high for September is 72° with an average low of 49°. 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.