S
M
T
W
T
F
S
30
84°
49°
31
74°
48°
1
72°
54°
2
79°
51°
3
80°
49°
4
70°
44°
5
69°
52°
6
77°
52°
7
81°
43°
8
72°
43°
9
67°
44°
10
67°
42°
11
66°
40°
12
66°
44°
13
69°
47°
14
74°
50°
15
77°
51°
16
78°
49°
17
78°
45°
18
68°
43°
19
67°
48°
20
74°
47°
21
69°
39°
22
70°
34°
23
61°
37°
24
64°
41°
25
71°
41°
26
61°
35°
27
62°
35°
28
Hist. Avg.
67°
41°
29
Hist. Avg.
66°
41°
30
Hist. Avg.
66°
41°
1
Hist. Avg.
66°
40°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
65°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Geyser
Geyser's September 2026 forecast shows daily high temperatures ranging from 61° to 84°, with overnight lows between 34° and 54°. The average high for September is 71° with an average low of 45°. 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 Geyser. See also: October | November | December.
