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°
30°
3
69°
46°
4
81°
44°
5
61°
48°
6
57°
38°
7
58°
36°
8
65°
36°
9
74°
45°
10
65°
39°
11
53°
38°
12
69°
37°
13
58°
40°
14
65°
38°
15
75°
48°
16
83°
63°
17
85°
58°
18
80°
67°
19
79°
59°
20
59°
45°
21
56°
46°
22
67°
54°
23
65°
54°
24
80°
57°
25
84°
62°
26
84°
62°
27
75°
56°
28
76°
57°
29
74°
56°
30
76°
58°
31
74°
61°
1
77°
57°
2
76°
58°
3
75°
59°
4
76°
54°
5
74°
53°
6
69°
51°
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 65° to 84°, with overnight lows between 51° and 62°. The average high for May is 75° with an average low of 57°. 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.
