S
M
T
W
T
F
S
30
90°
70°
31
92°
72°
1
91°
74°
2
90°
73°
3
89°
74°
4
88°
72°
5
89°
72°
6
89°
71°
7
91°
72°
8
91°
71°
9
90°
72°
10
91°
72°
11
90°
73°
12
89°
72°
13
88°
72°
14
89°
73°
15
88°
70°
16
88°
71°
17
92°
72°
18
89°
71°
19
87°
72°
20
89°
71°
21
90°
72°
22
89°
71°
23
88°
70°
24
87°
71°
25
86°
70°
26
87°
71°
27
Hist. Avg.
88°
69°
28
Hist. Avg.
88°
69°
29
Hist. Avg.
88°
68°
30
Hist. Avg.
88°
68°
1
Hist. Avg.
88°
68°
2
Hist. Avg.
88°
68°
3
Hist. Avg.
87°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Blue Lake
Blue Lake's September 2026 forecast shows daily high temperatures ranging from 86° to 92°, with overnight lows between 70° and 74°. The average high for September is 89° with an average low of 72°. 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 Blue Lake. See also: October | November | December.
