S
M
T
W
T
F
S
26
65°
44°
27
66°
51°
28
62°
49°
29
58°
38°
30
59°
35°
1
50°
34°
2
56°
30°
3
67°
42°
4
79°
45°
5
56°
44°
6
57°
37°
7
60°
33°
8
66°
44°
9
74°
47°
10
64°
42°
11
59°
42°
12
75°
40°
13
63°
41°
14
68°
39°
15
74°
51°
16
82°
58°
17
85°
58°
18
77°
64°
19
77°
58°
20
61°
47°
21
63°
47°
22
69°
51°
23
78°
56°
24
77°
57°
25
82°
55°
26
83°
57°
27
91°
58°
28
79°
53°
29
82°
56°
30
82°
53°
31
77°
53°
1
74°
55°
2
80°
56°
3
82°
60°
4
79°
58°
5
81°
60°
6
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Westlake
Westlake's May 2026 forecast shows daily high temperatures ranging from 74° to 91°, with overnight lows between 53° and 60°. The average high for May is 81° with an average low of 56°. 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 Westlake. See also: June | July | August.