S
M
T
W
T
F
S
30
92°
67°
31
94°
68°
1
95°
71°
2
95°
70°
3
94°
70°
4
94°
72°
5
93°
72°
6
93°
71°
7
94°
69°
8
91°
71°
9
86°
70°
10
92°
71°
11
91°
70°
12
92°
70°
13
93°
69°
14
92°
67°
15
91°
62°
16
83°
61°
17
82°
65°
18
85°
66°
19
83°
62°
20
81°
62°
21
81°
61°
22
82°
64°
23
85°
66°
24
85°
66°
25
87°
65°
26
87°
65°
27
88°
63°
28
85°
62°
29
84°
61°
30
85°
60°
1
83°
61°
2
85°
64°
3
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Whitesboro
Whitesboro's September 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 55° and 72°. The average high for September is 88° with an average low of 66°. 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 Whitesboro. See also: October | November | December.
