S
M
T
W
T
F
S
30
81°
64°
31
86°
64°
1
82°
62°
2
83°
68°
3
84°
64°
4
87°
74°
5
88°
74°
6
85°
73°
7
74°
64°
8
81°
62°
9
82°
63°
10
87°
70°
11
87°
68°
12
90°
75°
13
83°
55°
14
76°
59°
15
82°
61°
16
84°
60°
17
84°
61°
18
85°
60°
19
82°
58°
20
78°
57°
21
79°
55°
22
77°
56°
23
76°
49°
24
71°
51°
25
66°
43°
26
67°
42°
27
77°
52°
28
73°
46°
29
68°
45°
30
68°
41°
1
72°
43°
2
75°
44°
3
76°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Farmington
Farmington's September 2026 forecast shows daily high temperatures ranging from 66° to 90°, with overnight lows between 41° and 75°. The average high for September is 78° with an average low of 54°. 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 Farmington. See also: October | November | December.
