S
M
T
W
T
F
S
30
77°
54°
31
79°
57°
1
81°
58°
2
82°
59°
3
82°
59°
4
81°
58°
5
82°
58°
6
79°
56°
7
75°
55°
8
75°
51°
9
74°
53°
10
72°
54°
11
71°
53°
12
72°
58°
13
73°
56°
14
72°
52°
15
73°
50°
16
72°
49°
17
Hist. Avg.
74°
52°
18
Hist. Avg.
73°
51°
19
Hist. Avg.
73°
51°
20
Hist. Avg.
73°
51°
21
Hist. Avg.
72°
51°
22
Hist. Avg.
72°
50°
23
Hist. Avg.
71°
50°
24
Hist. Avg.
71°
50°
25
Hist. Avg.
71°
49°
26
Hist. Avg.
70°
49°
27
Hist. Avg.
70°
49°
28
Hist. Avg.
69°
48°
29
Hist. Avg.
69°
48°
30
Hist. Avg.
69°
48°
1
Hist. Avg.
68°
48°
2
Hist. Avg.
68°
47°
3
Hist. Avg.
68°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Crestline
Crestline's September 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 49° and 59°. The average high for September is 76° with an average low of 55°. 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 Crestline. See also: October | November | December.
