S
M
T
W
T
F
S
26
58°
46°
27
63°
46°
28
70°
40°
29
75°
45°
30
76°
42°
1
75°
45°
2
64°
49°
3
62°
50°
4
64°
46°
5
62°
51°
6
72°
50°
7
71°
47°
8
75°
48°
9
80°
45°
10
80°
46°
11
83°
49°
12
72°
47°
13
77°
49°
14
81°
48°
15
82°
50°
16
77°
52°
17
74°
48°
18
84°
63°
19
89°
67°
20
86°
61°
21
90°
55°
22
80°
50°
23
75°
49°
24
76°
49°
25
73°
47°
26
80°
51°
27
86°
56°
28
82°
53°
29
80°
51°
30
86°
50°
31
87°
50°
1
85°
53°
2
86°
54°
3
86°
53°
4
81°
50°
5
76°
52°
6
78°
51°
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 73° to 87°, with overnight lows between 47° and 56°. The average high for May is 81° with an average low of 51°. 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.
