S
M
T
W
T
F
S
30
70°
52°
31
68°
54°
1
71°
54°
2
63°
55°
3
66°
46°
4
71°
45°
5
73°
48°
6
69°
49°
7
70°
51°
8
74°
50°
9
73°
50°
10
72°
50°
11
70°
50°
12
70°
51°
13
69°
51°
14
73°
50°
15
75°
53°
16
71°
53°
17
73°
52°
18
72°
52°
19
68°
50°
20
70°
53°
21
71°
51°
22
73°
52°
23
70°
49°
24
66°
48°
25
67°
48°
26
66°
45°
27
65°
48°
28
65°
46°
29
66°
49°
30
66°
51°
1
64°
46°
2
65°
46°
3
69°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Humboldt Redwoods State Park
Humboldt Redwoods State Park's September 2026 forecast shows daily high temperatures ranging from 63° to 75°, with overnight lows between 45° and 55°. The average high for September is 69° with an average low of 50°. 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 Redwoods State Park. See also: October | November | December.
