S
M
T
W
T
F
S
30
68°
53°
31
66°
48°
1
75°
50°
2
80°
44°
3
78°
59°
4
84°
53°
5
75°
56°
6
64°
58°
7
59°
51°
8
58°
46°
9
71°
52°
10
68°
47°
11
56°
43°
12
55°
38°
13
58°
39°
14
63°
41°
15
62°
40°
16
59°
38°
17
57°
37°
18
56°
40°
19
55°
37°
20
61°
40°
21
63°
46°
22
55°
45°
23
57°
44°
24
61°
46°
25
66°
47°
26
66°
46°
27
65°
44°
28
62°
42°
29
55°
41°
30
52°
40°
1
50°
36°
2
50°
41°
3
59°
39°
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 50° to 71°, with overnight lows between 36° and 52°. The average high for September is 59° with an average low of 42°. 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.
