S
M
T
W
T
F
S
30
61°
57°
31
63°
57°
1
63°
50°
2
63°
54°
3
61°
52°
4
57°
52°
5
N/A
6
53°
39°
7
58°
54°
8
59°
47°
9
57°
46°
10
57°
46°
11
56°
43°
12
55°
45°
13
57°
47°
14
58°
45°
15
56°
44°
16
55°
45°
17
54°
44°
18
57°
41°
19
54°
39°
20
53°
42°
21
51°
39°
22
49°
38°
23
48°
36°
24
52°
39°
25
54°
44°
26
55°
39°
27
50°
36°
28
49°
41°
29
53°
43°
30
53°
42°
1
50°
42°
2
51°
40°
3
51°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hertson
Hertson's September 2026 forecast shows daily high temperatures ranging from 48° to 59°, with overnight lows between 36° and 54°. The average high for September is 54° 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 Hertson. See also: October | November | December.