S
M
T
W
T
F
S
30
64°
43°
31
65°
44°
1
69°
43°
2
66°
43°
3
68°
46°
4
67°
49°
5
67°
48°
6
63°
44°
7
67°
46°
8
70°
47°
9
70°
49°
10
69°
50°
11
70°
47°
12
70°
49°
13
69°
48°
14
69°
49°
15
68°
46°
16
69°
40°
17
66°
35°
18
57°
35°
19
55°
36°
20
57°
39°
21
57°
43°
22
61°
45°
23
Hist. Avg.
61°
37°
24
Hist. Avg.
60°
37°
25
Hist. Avg.
60°
37°
26
Hist. Avg.
60°
37°
27
Hist. Avg.
59°
36°
28
Hist. Avg.
59°
36°
29
Hist. Avg.
58°
36°
30
Hist. Avg.
58°
35°
1
Hist. Avg.
58°
35°
2
Hist. Avg.
57°
35°
3
Hist. Avg.
57°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Humboldt
Humboldt's September 2026 forecast shows daily high temperatures ranging from 55° to 70°, with overnight lows between 35° and 50°. The average high for September is 66° with an average low of 44°. 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.
