S
M
T
W
T
F
S
26
81°
60°
27
81°
59°
28
71°
61°
29
82°
63°
30
72°
57°
1
67°
52°
2
68°
43°
3
70°
44°
4
79°
50°
5
80°
61°
6
79°
57°
7
73°
44°
8
71°
46°
9
76°
53°
10
79°
53°
11
79°
55°
12
81°
56°
13
82°
55°
14
83°
54°
15
83°
58°
16
84°
58°
17
84°
57°
18
83°
59°
19
84°
59°
20
84°
58°
21
85°
60°
22
84°
60°
23
84°
59°
24
80°
60°
25
84°
60°
26
85°
61°
27
80°
61°
28
81°
60°
29
83°
61°
30
86°
60°
31
85°
60°
1
87°
62°
2
87°
63°
3
86°
63°
4
88°
62°
5
82°
62°
6
81°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Simpson
Simpson's May 2026 forecast shows daily high temperatures ranging from 67° to 88°, with overnight lows between 43° and 63°. The average high for May is 81° with an average low of 57°. 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 Simpson. See also: June | July | August.