S
M
T
W
T
F
S
30
88°
66°
31
88°
67°
1
88°
68°
2
87°
68°
3
88°
69°
4
85°
68°
5
84°
63°
6
77°
60°
7
80°
64°
8
81°
63°
9
81°
63°
10
82°
60°
11
80°
61°
12
83°
60°
13
84°
62°
14
84°
62°
15
85°
64°
16
84°
63°
17
84°
63°
18
83°
62°
19
83°
63°
20
84°
62°
21
84°
62°
22
83°
61°
23
83°
62°
24
84°
61°
25
82°
60°
26
81°
59°
27
81°
60°
28
80°
59°
29
81°
58°
30
81°
58°
1
80°
57°
2
81°
58°
3
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Keith
Keith's September 2026 forecast shows daily high temperatures ranging from 77° to 88°, with overnight lows between 57° and 69°. The average high for September is 83° with an average low of 62°. 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 Keith. See also: October | November | December.