S
M
T
W
T
F
S
30
102°
73°
31
102°
73°
1
102°
75°
2
100°
75°
3
90°
77°
4
100°
73°
5
100°
73°
6
102°
73°
7
103°
75°
8
101°
75°
9
99°
76°
10
96°
74°
11
98°
75°
12
100°
74°
13
100°
72°
14
94°
70°
15
91°
68°
16
90°
66°
17
91°
69°
18
91°
66°
19
90°
66°
20
87°
62°
21
90°
69°
22
89°
68°
23
90°
67°
24
88°
67°
25
82°
66°
26
86°
66°
27
86°
65°
28
87°
66°
29
84°
65°
30
83°
58°
1
76°
53°
2
74°
54°
3
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Blue
Blue's September 2026 forecast shows daily high temperatures ranging from 74° to 103°, with overnight lows between 53° and 76°. The average high for September is 90° with an average low of 67°. 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 Blue. See also: October | November | December.
