S
M
T
W
T
F
S
26
50°
27°
27
46°
31°
28
41°
27°
29
45°
30°
30
44°
29°
1
60°
28°
2
62°
29°
3
74°
39°
4
44°
31°
5
38°
27°
6
45°
27°
7
56°
22°
8
57°
35°
9
53°
31°
10
52°
29°
11
67°
35°
12
67°
43°
13
80°
46°
14
79°
57°
15
63°
40°
16
47°
33°
17
48°
39°
18
52°
37°
19
52°
34°
20
67°
44°
21
62°
45°
22
67°
46°
23
65°
47°
24
68°
48°
25
71°
50°
26
72°
52°
27
72°
50°
28
76°
55°
29
69°
43°
30
72°
49°
31
70°
50°
1
68°
49°
2
67°
50°
3
71°
49°
4
73°
50°
5
65°
49°
6
66°
50°
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 47° to 76°, with overnight lows between 33° and 55°. The average high for May is 65° with an average low of 46°. 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.
