S
M
T
W
T
F
S
26
63°
43°
27
64°
45°
28
63°
54°
29
52°
43°
30
52°
39°
1
46°
39°
2
46°
36°
3
63°
37°
4
75°
47°
5
57°
49°
6
52°
43°
7
54°
39°
8
65°
37°
9
68°
45°
10
59°
40°
11
57°
37°
12
59°
34°
13
58°
43°
14
63°
43°
15
69°
38°
16
81°
50°
17
84°
57°
18
87°
66°
19
85°
64°
20
66°
45°
21
62°
40°
22
67°
43°
23
58°
52°
24
64°
52°
25
78°
56°
26
83°
61°
27
81°
52°
28
69°
49°
29
77°
50°
30
69°
48°
31
75°
51°
1
77°
52°
2
77°
57°
3
80°
60°
4
81°
58°
5
80°
62°
6
82°
62°
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 69° to 83°, with overnight lows between 48° and 62°. The average high for May is 78° with an average low of 55°. 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.
