S
M
T
W
T
F
S
30
79°
69°
31
90°
69°
1
83°
72°
2
77°
65°
3
79°
67°
4
76°
68°
5
74°
62°
6
73°
57°
7
77°
55°
8
72°
70°
9
81°
55°
10
74°
51°
11
76°
60°
12
78°
55°
13
69°
58°
14
72°
63°
15
67°
53°
16
65°
52°
17
69°
50°
18
64°
48°
19
66°
49°
20
65°
51°
21
60°
53°
22
66°
57°
23
68°
56°
24
70°
57°
25
70°
56°
26
67°
56°
27
69°
57°
28
70°
57°
29
70°
56°
30
69°
56°
1
66°
53°
2
63°
48°
3
57°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Whitelaw
Whitelaw's September 2026 forecast shows daily high temperatures ranging from 57° to 81°, with overnight lows between 45° and 70°. The average high for September is 69° with an average low of 55°. 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 Whitelaw. See also: October | November | December.