S
M
T
W
T
F
S
30
70°
49°
31
67°
48°
1
70°
49°
2
71°
49°
3
70°
48°
4
70°
48°
5
69°
47°
6
65°
47°
7
66°
46°
8
63°
47°
9
59°
47°
10
65°
46°
11
58°
45°
12
60°
42°
13
66°
38°
14
64°
40°
15
65°
42°
16
64°
43°
17
65°
44°
18
67°
46°
19
67°
41°
20
65°
38°
21
59°
37°
22
59°
41°
23
62°
34°
24
60°
38°
25
60°
38°
26
59°
42°
27
60°
42°
28
62°
40°
29
61°
32°
30
59°
28°
1
49°
34°
2
53°
37°
3
56°
37°
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 49° to 71°, with overnight lows between 28° and 49°. The average high for September is 63° with an average low of 42°. 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.