S
M
T
W
T
F
S
26
62°
49°
27
62°
51°
28
73°
46°
29
75°
51°
30
74°
52°
1
77°
54°
2
80°
55°
3
65°
55°
4
63°
52°
5
60°
50°
6
74°
49°
7
81°
55°
8
82°
56°
9
84°
59°
10
86°
58°
11
94°
61°
12
72°
58°
13
74°
57°
14
74°
54°
15
70°
56°
16
67°
57°
17
65°
56°
18
78°
54°
19
83°
55°
20
87°
63°
21
83°
61°
22
77°
56°
23
77°
55°
24
73°
58°
25
73°
53°
26
67°
55°
27
64°
53°
28
66°
51°
29
67°
53°
30
79°
52°
31
86°
59°
1
83°
60°
2
81°
56°
3
85°
57°
4
88°
61°
5
87°
60°
6
80°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fontana
Fontana'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 Fontana. See also: June | July | August.
