S
M
T
W
T
F
S
30
77°
47°
31
77°
42°
1
70°
39°
2
62°
37°
3
63°
40°
4
64°
41°
5
65°
43°
6
73°
50°
7
73°
43°
8
72°
39°
9
68°
45°
10
67°
38°
11
62°
43°
12
68°
41°
13
63°
34°
14
59°
44°
15
62°
48°
16
69°
42°
17
63°
40°
18
61°
45°
19
68°
39°
20
61°
31°
21
56°
39°
22
57°
45°
23
60°
33°
24
65°
34°
25
54°
35°
26
53°
39°
27
55°
41°
28
60°
43°
29
56°
40°
30
63°
34°
1
59°
31°
2
50°
35°
3
52°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Narcisse
Narcisse's September 2026 forecast shows daily high temperatures ranging from 50° to 77°, with overnight lows between 31° and 50°. The average high for September is 63° with an average low of 40°. 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 Narcisse. See also: October | November | December.