S
M
T
W
T
F
S
30
90°
73°
31
93°
70°
1
95°
72°
2
95°
71°
3
96°
73°
4
92°
72°
5
92°
71°
6
92°
70°
7
84°
65°
8
90°
67°
9
89°
65°
10
92°
64°
11
92°
68°
12
90°
66°
13
89°
64°
14
90°
65°
15
88°
62°
16
86°
66°
17
81°
65°
18
80°
65°
19
80°
66°
20
83°
65°
21
85°
65°
22
83°
64°
23
85°
64°
24
84°
63°
25
80°
64°
26
83°
63°
27
84°
60°
28
81°
55°
29
77°
54°
30
76°
53°
1
78°
56°
2
79°
60°
3
74°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Roberta
Roberta's September 2026 forecast shows daily high temperatures ranging from 74° to 96°, with overnight lows between 53° and 73°. The average high for September is 85° with an average low of 64°. 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 Roberta. See also: October | November | December.