S
M
T
W
T
F
S
30
67°
61°
31
67°
59°
1
67°
57°
2
66°
62°
3
69°
64°
4
66°
59°
5
67°
56°
6
71°
60°
7
66°
61°
8
N/A
9
64°
48°
10
63°
54°
11
68°
45°
12
67°
59°
13
70°
56°
14
71°
58°
15
67°
52°
16
65°
51°
17
65°
54°
18
65°
54°
19
66°
53°
20
65°
52°
21
65°
56°
22
65°
56°
23
64°
55°
24
64°
54°
25
63°
51°
26
62°
53°
27
62°
50°
28
61°
50°
29
61°
53°
30
62°
53°
1
62°
50°
2
61°
53°
3
62°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Gunnislake
Gunnislake's September 2026 forecast shows daily high temperatures ranging from 61° to 71°, with overnight lows between 45° and 59°. The average high for September is 64° with an average low of 53°. 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 Gunnislake. See also: October | November | December.
