S
M
T
W
T
F
S
26
57°
38°
27
69°
30°
28
51°
47°
29
52°
41°
30
43°
34°
1
41°
28°
2
41°
29°
3
53°
25°
4
69°
41°
5
68°
50°
6
54°
39°
7
53°
28°
8
57°
28°
9
60°
45°
10
58°
32°
11
56°
28°
12
63°
25°
13
63°
40°
14
45°
41°
15
61°
41°
16
72°
59°
17
75°
58°
18
85°
61°
19
78°
56°
20
70°
51°
21
61°
41°
22
60°
46°
23
63°
47°
24
71°
50°
25
69°
55°
26
70°
56°
27
71°
46°
28
66°
51°
29
67°
52°
30
70°
50°
31
65°
46°
1
64°
43°
2
64°
43°
3
65°
44°
4
66°
46°
5
70°
53°
6
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Westline
Westline's May 2026 forecast shows daily high temperatures ranging from 45° to 85°, with overnight lows between 41° and 61°. The average high for May is 68° with an average low of 50°. 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 Westline. See also: June | July | August.