S
M
T
W
T
F
S
26
81°
51°
27
83°
61°
28
66°
55°
29
64°
50°
30
67°
40°
1
64°
44°
2
61°
44°
3
78°
41°
4
79°
58°
5
70°
46°
6
63°
43°
7
68°
39°
8
77°
47°
9
81°
56°
10
70°
49°
11
78°
44°
12
83°
51°
13
75°
51°
14
75°
45°
15
84°
58°
16
77°
66°
17
91°
71°
18
82°
74°
19
80°
55°
20
69°
52°
21
73°
51°
22
79°
57°
23
80°
61°
24
82°
64°
25
80°
63°
26
83°
63°
27
82°
64°
28
83°
63°
29
80°
59°
30
80°
64°
31
84°
65°
1
84°
65°
2
83°
64°
3
79°
62°
4
77°
58°
5
79°
63°
6
84°
66°
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 69° to 91°, with overnight lows between 51° and 74°. The average high for May is 81° with an average low of 62°. 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.
