S
M
T
W
T
F
S
26
67°
38°
27
73°
37°
28
69°
48°
29
58°
44°
30
50°
38°
1
53°
30°
2
50°
36°
3
58°
44°
4
66°
52°
5
64°
40°
6
56°
35°
7
52°
37°
8
52°
35°
9
52°
36°
10
57°
36°
11
58°
38°
12
58°
40°
13
59°
41°
14
61°
45°
15
60°
43°
16
61°
42°
17
68°
48°
18
68°
47°
19
65°
43°
20
67°
48°
21
69°
48°
22
68°
47°
23
61°
40°
24
60°
40°
25
60°
41°
26
62°
42°
27
62°
41°
28
63°
41°
29
63°
42°
30
66°
44°
31
64°
49°
1
65°
45°
2
66°
44°
3
69°
50°
4
70°
47°
5
68°
52°
6
75°
54°
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 52° to 75°, with overnight lows between 35° and 54°. The average high for May is 63° with an average low of 43°. 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.
