S
M
T
W
T
F
S
26
83°
65°
27
84°
72°
28
82°
67°
29
70°
61°
30
68°
57°
1
66°
54°
2
74°
46°
3
80°
54°
4
82°
61°
5
83°
72°
6
78°
51°
7
70°
49°
8
79°
54°
9
82°
62°
10
80°
59°
11
76°
58°
12
79°
60°
13
83°
61°
14
82°
61°
15
81°
58°
16
78°
62°
17
77°
61°
18
77°
62°
19
78°
63°
20
78°
63°
21
82°
58°
22
78°
56°
23
77°
57°
24
78°
58°
25
78°
58°
26
79°
57°
27
78°
58°
28
79°
59°
29
80°
62°
30
81°
65°
31
79°
66°
1
81°
66°
2
82°
64°
3
82°
67°
4
84°
67°
5
83°
68°
6
82°
68°
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 70° to 84°, with overnight lows between 46° and 72°. The average high for May is 79° with an average low of 60°. 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.