S
M
T
W
T
F
S
30
86°
49°
31
85°
46°
1
76°
51°
2
77°
52°
3
80°
50°
4
78°
45°
5
74°
48°
6
75°
51°
7
81°
45°
8
80°
43°
9
74°
48°
10
75°
46°
11
74°
43°
12
71°
44°
13
71°
48°
14
76°
48°
15
79°
49°
16
80°
50°
17
81°
43°
18
80°
40°
19
70°
45°
20
74°
46°
21
76°
45°
22
78°
35°
23
68°
35°
24
65°
38°
25
70°
37°
26
Hist. Avg.
71°
38°
27
Hist. Avg.
70°
38°
28
Hist. Avg.
70°
38°
29
Hist. Avg.
69°
37°
30
Hist. Avg.
69°
37°
1
Hist. Avg.
68°
36°
2
Hist. Avg.
68°
36°
3
Hist. Avg.
67°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Glenrock
Glenrock's September 2026 forecast shows daily high temperatures ranging from 65° to 86°, with overnight lows between 35° and 52°. The average high for September is 76° 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 Glenrock. See also: October | November | December.