S
M
T
W
T
F
S
26
57°
40°
27
68°
46°
28
64°
51°
29
56°
39°
30
54°
36°
1
49°
33°
2
56°
43°
3
66°
46°
4
74°
49°
5
54°
40°
6
52°
39°
7
53°
38°
8
59°
41°
9
63°
45°
10
61°
46°
11
62°
46°
12
63°
48°
13
65°
51°
14
69°
49°
15
68°
47°
16
69°
54°
17
71°
51°
18
64°
50°
19
69°
54°
20
69°
53°
21
67°
44°
22
63°
44°
23
63°
46°
24
65°
45°
25
64°
46°
26
64°
47°
27
65°
47°
28
66°
48°
29
66°
52°
30
68°
57°
31
73°
52°
1
68°
53°
2
72°
57°
3
74°
58°
4
76°
58°
5
76°
59°
6
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Farmington
Farmington's May 2026 forecast shows daily high temperatures ranging from 52° to 78°, with overnight lows between 38° and 60°. The average high for May is 66° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Farmington. See also: June | July | August.