S
M
T
W
T
F
S
26
79°
46°
27
75°
54°
28
64°
50°
29
61°
39°
30
57°
36°
1
57°
37°
2
61°
36°
3
73°
46°
4
84°
41°
5
59°
46°
6
57°
36°
7
66°
32°
8
72°
43°
9
77°
48°
10
70°
43°
11
72°
43°
12
81°
52°
13
73°
50°
14
77°
41°
15
82°
57°
16
84°
63°
17
86°
64°
18
77°
64°
19
70°
52°
20
68°
46°
21
72°
50°
22
70°
55°
23
79°
55°
24
83°
56°
25
87°
61°
26
86°
65°
27
83°
63°
28
84°
59°
29
82°
57°
30
78°
59°
31
76°
55°
1
80°
60°
2
80°
58°
3
82°
61°
4
83°
59°
5
80°
60°
6
80°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Oakville
Oakville's May 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 55° and 65°. The average high for May is 82° with an average low of 59°. 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 Oakville. See also: June | July | August.
