S
M
T
W
T
F
S
26
79°
59°
27
73°
55°
28
73°
49°
29
83°
59°
30
76°
62°
1
68°
57°
2
61°
53°
3
72°
45°
4
81°
48°
5
83°
52°
6
87°
60°
7
80°
62°
8
73°
54°
9
76°
59°
10
86°
62°
11
85°
61°
12
71°
53°
13
81°
51°
14
80°
59°
15
79°
47°
16
90°
64°
17
91°
64°
18
93°
60°
19
92°
64°
20
93°
68°
21
93°
66°
22
84°
65°
23
82°
64°
24
81°
65°
25
86°
63°
26
85°
64°
27
86°
64°
28
83°
62°
29
85°
63°
30
88°
66°
31
87°
65°
1
88°
67°
2
88°
68°
3
87°
67°
4
83°
67°
5
83°
66°
6
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pontiac
Pontiac's May 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 60° and 68°. The average high for May is 87° with an average low of 65°. 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 Pontiac. See also: June | July | August.
