S
M
T
W
T
F
S
26
64°
46°
27
79°
37°
28
69°
51°
29
65°
52°
30
55°
37°
1
63°
35°
2
52°
33°
3
60°
32°
4
72°
58°
5
78°
57°
6
65°
45°
7
57°
37°
8
64°
44°
9
62°
41°
10
70°
48°
11
65°
41°
12
66°
43°
13
68°
48°
14
66°
47°
15
64°
44°
16
71°
46°
17
73°
47°
18
77°
52°
19
73°
51°
20
77°
52°
21
74°
49°
22
73°
44°
23
66°
44°
24
67°
45°
25
68°
46°
26
68°
46°
27
69°
45°
28
69°
46°
29
70°
45°
30
71°
46°
31
75°
55°
1
72°
52°
2
73°
48°
3
73°
52°
4
75°
55°
5
77°
52°
6
81°
57°
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 57° to 81°, with overnight lows between 37° and 58°. The average high for May is 70° 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 May weather will actually feel in Farmington. See also: June | July | August.