S
M
T
W
T
F
S
26
56°
39°
27
55°
39°
28
58°
41°
29
62°
47°
30
65°
49°
1
69°
48°
2
61°
46°
3
57°
43°
4
57°
43°
5
58°
45°
6
59°
50°
7
63°
51°
8
68°
47°
9
62°
45°
10
61°
46°
11
63°
52°
12
64°
51°
13
65°
53°
14
66°
51°
15
65°
54°
16
69°
55°
17
73°
54°
18
68°
47°
19
63°
48°
20
66°
55°
21
69°
55°
22
68°
48°
23
69°
47°
24
71°
49°
25
73°
51°
26
71°
49°
27
74°
52°
28
76°
57°
29
78°
52°
30
76°
53°
31
69°
55°
1
70°
54°
2
75°
48°
3
70°
56°
4
74°
60°
5
80°
61°
6
80°
61°
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 80°, with overnight lows between 39° and 61°. 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.
