S
M
T
W
T
F
S
26
69°
51°
27
57°
50°
28
63°
48°
29
67°
54°
30
66°
56°
1
59°
55°
2
60°
53°
3
62°
51°
4
70°
53°
5
73°
64°
6
76°
67°
7
71°
54°
8
64°
53°
9
73°
63°
10
76°
64°
11
71°
54°
12
64°
52°
13
71°
58°
14
68°
57°
15
68°
54°
16
75°
61°
17
80°
68°
18
80°
71°
19
80°
72°
20
81°
71°
21
81°
74°
22
75°
64°
23
80°
66°
24
78°
72°
25
80°
73°
26
82°
76°
27
88°
75°
28
82°
69°
29
72°
66°
30
82°
62°
31
68°
60°
1
77°
64°
2
64°
62°
3
71°
61°
4
73°
61°
5
83°
63°
6
83°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairfield
Fairfield's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Fairfield. See also: June | July | August.