S
M
T
W
T
F
S
30
71°
58°
31
69°
55°
1
68°
54°
2
66°
58°
3
71°
61°
4
67°
58°
5
66°
54°
6
72°
50°
7
67°
59°
8
63°
54°
9
64°
46°
10
67°
54°
11
68°
49°
12
69°
58°
13
70°
52°
14
71°
60°
15
69°
51°
16
65°
51°
17
65°
50°
18
67°
51°
19
69°
52°
20
68°
51°
21
66°
52°
22
66°
53°
23
67°
52°
24
65°
51°
25
62°
50°
26
60°
49°
27
63°
51°
28
63°
46°
29
58°
45°
30
58°
48°
1
59°
49°
2
62°
50°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Holtby
Holtby's September 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 45° and 60°. The average high for September is 65° with an average low of 51°. 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 Holtby. See also: October | November | December.