S
M
T
W
T
F
S
26
85°
61°
27
80°
62°
28
71°
56°
29
86°
63°
30
77°
64°
1
67°
56°
2
73°
50°
3
74°
43°
4
79°
45°
5
82°
49°
6
85°
60°
7
81°
67°
8
71°
60°
9
69°
60°
10
80°
62°
11
86°
61°
12
68°
59°
13
80°
60°
14
81°
56°
15
80°
48°
16
87°
53°
17
91°
67°
18
88°
61°
19
88°
62°
20
90°
68°
21
89°
67°
22
90°
67°
23
88°
69°
24
86°
67°
25
84°
68°
26
85°
70°
27
87°
71°
28
85°
71°
29
83°
69°
30
87°
70°
31
80°
69°
1
87°
68°
2
86°
67°
3
85°
64°
4
80°
68°
5
81°
66°
6
84°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lamar
Lamar's May 2026 forecast shows daily high temperatures ranging from 80° to 87°, with overnight lows between 64° and 71°. The average high for May is 84° with an average low of 68°. 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 Lamar. See also: June | July | August.