S
M
T
W
T
F
S
30
81°
59°
31
81°
58°
1
82°
55°
2
74°
51°
3
73°
51°
4
74°
52°
5
75°
50°
6
80°
57°
7
81°
58°
8
81°
57°
9
80°
58°
10
82°
57°
11
80°
56°
12
81°
57°
13
82°
58°
14
82°
51°
15
70°
49°
16
69°
50°
17
71°
49°
18
69°
48°
19
70°
44°
20
69°
46°
21
77°
49°
22
77°
50°
23
76°
43°
24
75°
43°
25
69°
44°
26
72°
49°
27
74°
51°
28
75°
49°
29
68°
40°
30
65°
40°
1
65°
45°
2
71°
42°
3
73°
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 65° to 82°, with overnight lows between 40° and 59°. The average high for September is 75° with an average low of 50°. 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.
