S
M
T
W
T
F
S
27
66°
38°
28
72°
32°
29
82°
45°
30
61°
36°
1
69°
43°
2
66°
48°
3
53°
42°
4
56°
39°
5
67°
48°
6
62°
53°
7
74°
46°
8
54°
36°
9
64°
35°
10
76°
48°
11
68°
44°
12
80°
42°
13
68°
62°
14
76°
61°
15
81°
56°
16
83°
60°
17
70°
54°
18
58°
52°
19
57°
40°
20
56°
38°
21
50°
47°
22
53°
47°
23
53°
39°
24
61°
41°
25
65°
39°
26
70°
41°
27
72°
49°
28
58°
51°
29
65°
55°
30
75°
53°
31
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pontiac
Pontiac's May 2025 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 Pontiac. See also: June | July | August.