S
M
T
W
T
F
S
30
88°
66°
31
89°
67°
1
89°
67°
2
90°
66°
3
90°
67°
4
89°
67°
5
89°
66°
6
88°
62°
7
87°
58°
8
80°
63°
9
79°
64°
10
78°
65°
11
86°
64°
12
85°
65°
13
86°
63°
14
86°
55°
15
82°
57°
16
74°
54°
17
75°
54°
18
76°
58°
19
79°
52°
20
75°
52°
21
74°
54°
22
75°
58°
23
78°
59°
24
81°
60°
25
82°
60°
26
82°
58°
27
83°
59°
28
79°
55°
29
78°
56°
30
78°
55°
1
79°
53°
2
81°
56°
3
72°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Humboldt
Humboldt's September 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 46° and 67°. The average high for September is 82° with an average low of 59°. 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 Humboldt. See also: October | November | December.
