S
M
T
W
T
F
S
26
55°
43°
27
56°
41°
28
62°
42°
29
56°
42°
30
64°
43°
1
64°
45°
2
57°
43°
3
57°
42°
4
58°
43°
5
59°
43°
6
61°
50°
7
70°
50°
8
66°
47°
9
65°
51°
10
63°
43°
11
60°
41°
12
60°
42°
13
61°
42°
14
62°
46°
15
63°
49°
16
65°
52°
17
69°
51°
18
70°
45°
19
63°
45°
20
64°
50°
21
69°
56°
22
73°
57°
23
73°
57°
24
76°
56°
25
70°
54°
26
75°
60°
27
77°
56°
28
68°
53°
29
78°
56°
30
78°
53°
31
71°
50°
1
75°
53°
2
76°
54°
3
75°
59°
4
78°
59°
5
78°
60°
6
71°
56°
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 55° to 78°, with overnight lows between 41° and 60°. The average high for May is 67° with an average low of 50°. 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.
