S
M
T
W
T
F
S
26
82°
51°
27
83°
64°
28
76°
61°
29
69°
53°
30
65°
44°
1
64°
42°
2
60°
39°
3
72°
55°
4
77°
59°
5
69°
48°
6
64°
44°
7
62°
43°
8
68°
52°
9
70°
51°
10
72°
54°
11
75°
56°
12
74°
55°
13
73°
53°
14
74°
52°
15
75°
60°
16
76°
60°
17
78°
59°
18
77°
60°
19
77°
61°
20
80°
61°
21
80°
60°
22
79°
61°
23
75°
58°
24
74°
60°
25
78°
62°
26
77°
61°
27
76°
56°
28
75°
59°
29
76°
55°
30
77°
60°
31
82°
63°
1
78°
63°
2
83°
64°
3
84°
63°
4
77°
58°
5
77°
57°
6
76°
57°
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 60° to 84°, with overnight lows between 39° and 64°. The average high for May is 75° with an average low of 56°. 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.