S
M
T
W
T
F
S
26
67°
51°
27
62°
46°
28
53°
41°
29
63°
35°
30
64°
41°
1
66°
40°
2
68°
35°
3
79°
52°
4
85°
49°
5
55°
46°
6
60°
43°
7
78°
43°
8
79°
52°
9
82°
48°
10
74°
51°
11
83°
52°
12
86°
59°
13
83°
48°
14
89°
62°
15
95°
68°
16
94°
64°
17
94°
59°
18
81°
50°
19
63°
44°
20
66°
43°
21
62°
50°
22
74°
58°
23
77°
50°
24
85°
53°
25
86°
61°
26
88°
61°
27
84°
64°
28
82°
65°
29
78°
61°
30
79°
58°
31
80°
54°
1
82°
57°
2
84°
58°
3
86°
60°
4
86°
60°
5
83°
63°
6
87°
65°
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 78° to 88°, with overnight lows between 54° and 65°. The average high for May is 83° with an average low of 61°. 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.