S
M
T
W
T
F
S
30
86°
66°
31
87°
64°
1
80°
61°
2
82°
66°
3
86°
61°
4
87°
66°
5
87°
66°
6
86°
65°
7
86°
60°
8
80°
59°
9
82°
58°
10
83°
59°
11
84°
59°
12
83°
62°
13
84°
63°
14
83°
62°
15
82°
63°
16
83°
62°
17
82°
56°
18
77°
55°
19
75°
56°
20
75°
61°
21
76°
59°
22
76°
56°
23
77°
59°
24
75°
59°
25
75°
58°
26
79°
59°
27
80°
58°
28
80°
57°
29
75°
58°
30
74°
57°
1
73°
58°
2
74°
54°
3
75°
50°
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 73° to 87°, with overnight lows between 50° and 66°. The average high for September is 80° with an average low of 60°. 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.