S
M
T
W
T
F
S
30
89°
66°
31
89°
66°
1
88°
65°
2
89°
67°
3
89°
67°
4
88°
66°
5
88°
65°
6
89°
67°
7
89°
64°
8
81°
63°
9
83°
63°
10
85°
62°
11
86°
63°
12
86°
63°
13
85°
61°
14
72°
56°
15
73°
60°
16
73°
59°
17
80°
56°
18
73°
48°
19
75°
53°
20
77°
58°
21
77°
57°
22
73°
57°
23
76°
56°
24
72°
57°
25
72°
57°
26
74°
52°
27
81°
43°
28
70°
45°
29
71°
51°
30
70°
51°
1
75°
57°
2
78°
57°
3
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Julian
Julian's September 2026 forecast shows daily high temperatures ranging from 70° to 89°, with overnight lows between 43° and 67°. The average high for September is 80° with an average low of 59°. 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 Julian. See also: October | November | December.