S
M
T
W
T
F
S
30
91°
68°
31
83°
68°
1
90°
67°
2
91°
68°
3
90°
70°
4
91°
67°
5
91°
62°
6
84°
58°
7
81°
58°
8
82°
65°
9
83°
63°
10
84°
58°
11
78°
56°
12
76°
59°
13
78°
63°
14
77°
55°
15
86°
54°
16
80°
53°
17
74°
52°
18
74°
53°
19
75°
52°
20
72°
51°
21
73°
52°
22
74°
52°
23
74°
53°
24
76°
55°
25
76°
58°
26
80°
57°
27
81°
59°
28
75°
52°
29
80°
49°
30
76°
51°
1
73°
52°
2
71°
48°
3
70°
55°
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 70° to 91°, with overnight lows between 48° and 70°. The average high for September is 80° with an average low of 58°. 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.
