S
M
T
W
T
F
S
30
84°
70°
31
88°
69°
1
89°
69°
2
89°
69°
3
89°
71°
4
90°
69°
5
92°
69°
6
84°
63°
7
82°
65°
8
78°
64°
9
78°
59°
10
77°
56°
11
74°
56°
12
75°
55°
13
75°
56°
14
73°
52°
15
78°
58°
16
77°
57°
17
77°
58°
18
78°
59°
19
77°
57°
20
76°
57°
21
78°
58°
22
78°
58°
23
77°
57°
24
78°
57°
25
77°
56°
26
76°
56°
27
77°
55°
28
76°
55°
29
75°
54°
30
76°
55°
1
75°
55°
2
75°
54°
3
74°
53°
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 73° to 92°, with overnight lows between 52° and 71°. The average high for September is 79° 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.
