S
M
T
W
T
F
S
26
67°
51°
27
69°
47°
28
75°
47°
29
80°
48°
30
81°
50°
1
75°
53°
2
69°
54°
3
70°
52°
4
65°
52°
5
67°
53°
6
77°
55°
7
80°
53°
8
78°
53°
9
84°
54°
10
81°
53°
11
92°
53°
12
78°
53°
13
79°
53°
14
87°
53°
15
86°
53°
16
84°
52°
17
78°
48°
18
85°
57°
19
90°
51°
20
89°
54°
21
91°
54°
22
83°
54°
23
74°
53°
24
74°
53°
25
73°
55°
26
72°
54°
27
80°
55°
28
84°
57°
29
87°
56°
30
81°
56°
31
83°
57°
1
85°
54°
2
82°
55°
3
82°
54°
4
77°
55°
5
78°
56°
6
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fairfield-Suisun City
Fairfield-Suisun City's May 2026 forecast shows daily high temperatures ranging from 72° to 91°, with overnight lows between 53° and 57°. The average high for May is 81° with an average low of 55°. 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-Suisun City. See also: June | July | August.
