S
M
T
W
T
F
S
30
81°
63°
31
88°
65°
1
90°
70°
2
86°
69°
3
85°
69°
4
90°
67°
5
82°
61°
6
80°
57°
7
79°
63°
8
87°
66°
9
86°
58°
10
81°
55°
11
80°
58°
12
82°
60°
13
78°
57°
14
75°
55°
15
80°
58°
16
81°
54°
17
78°
56°
18
70°
45°
19
77°
56°
20
79°
55°
21
74°
54°
22
75°
54°
23
77°
53°
24
77°
54°
25
76°
54°
26
76°
53°
27
77°
54°
28
77°
54°
29
75°
53°
30
74°
52°
1
72°
46°
2
63°
43°
3
63°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Blue River
Blue River's September 2026 forecast shows daily high temperatures ranging from 63° to 87°, with overnight lows between 39° and 66°. The average high for September is 77° with an average low of 54°. 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 River. See also: October | November | December.
