S
M
T
W
T
F
S
26
86°
75°
27
90°
74°
28
91°
77°
29
92°
74°
30
80°
68°
1
72°
57°
2
75°
54°
3
81°
55°
4
81°
59°
5
89°
69°
6
91°
69°
7
72°
65°
8
83°
66°
9
93°
70°
10
91°
64°
11
82°
65°
12
87°
64°
13
91°
62°
14
92°
60°
15
90°
68°
16
90°
65°
17
89°
76°
18
92°
78°
19
88°
69°
20
86°
66°
21
82°
67°
22
87°
70°
23
82°
68°
24
88°
69°
25
88°
68°
26
87°
66°
27
78°
65°
28
88°
65°
29
89°
69°
30
91°
72°
31
90°
75°
1
93°
74°
2
92°
74°
3
89°
73°
4
87°
71°
5
88°
72°
6
90°
73°
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 87° to 93°, with overnight lows between 71° and 75°. The average high for May is 90° with an average low of 73°. 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.
