S
M
T
W
T
F
S
30
73°
58°
31
87°
65°
1
89°
72°
2
93°
71°
3
86°
67°
4
78°
64°
5
78°
57°
6
78°
56°
7
77°
54°
8
82°
53°
9
86°
69°
10
82°
65°
11
77°
57°
12
75°
57°
13
83°
65°
14
70°
49°
15
80°
48°
16
82°
63°
17
80°
69°
18
75°
58°
19
69°
58°
20
70°
55°
21
63°
55°
22
61°
53°
23
60°
48°
24
64°
43°
25
67°
44°
26
70°
44°
27
69°
47°
28
66°
46°
29
68°
48°
30
68°
49°
1
64°
50°
2
65°
45°
3
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Farrell
Farrell's September 2026 forecast shows daily high temperatures ranging from 60° to 70°, with overnight lows between 43° and 55°. The average high for September is 66° with an average low of 48°. 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 Farrell. See also: October | November | December.