S
M
T
W
T
F
S
30
84°
75°
31
93°
73°
1
95°
70°
2
95°
72°
3
93°
72°
4
95°
72°
5
91°
72°
6
84°
68°
7
81°
68°
8
91°
68°
9
84°
64°
10
82°
59°
11
82°
57°
12
77°
57°
13
61°
54°
14
75°
57°
15
72°
61°
16
70°
65°
17
76°
65°
18
82°
68°
19
79°
62°
20
69°
60°
21
68°
53°
22
69°
55°
23
73°
53°
24
71°
51°
25
74°
54°
26
75°
55°
27
75°
56°
28
76°
53°
29
72°
47°
30
72°
54°
1
75°
53°
2
72°
52°
3
69°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Runnells
Runnells's September 2026 forecast shows daily high temperatures ranging from 68° to 82°, with overnight lows between 47° and 68°. The average high for September is 73° with an average low of 56°. 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 Runnells. See also: October | November | December.