S
M
T
W
T
F
S
30
68°
53°
31
65°
53°
1
69°
54°
2
70°
58°
3
66°
52°
4
66°
51°
5
67°
50°
6
68°
51°
7
67°
51°
8
70°
52°
9
69°
54°
10
68°
53°
11
71°
53°
12
69°
56°
13
70°
54°
14
73°
56°
15
72°
55°
16
67°
52°
17
67°
50°
18
68°
51°
19
67°
50°
20
67°
55°
21
68°
49°
22
67°
51°
23
66°
52°
24
65°
49°
25
65°
50°
26
66°
48°
27
65°
53°
28
66°
48°
29
67°
51°
30
66°
54°
1
65°
51°
2
65°
47°
3
67°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fortuna
Fortuna's September 2026 forecast shows daily high temperatures ranging from 65° to 73°, with overnight lows between 47° and 58°. The average high for September is 67° with an average low of 52°. 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 Fortuna. See also: October | November | December.
