S
M
T
W
T
F
S
26
77°
57°
27
87°
71°
28
81°
65°
29
73°
55°
30
67°
53°
1
74°
48°
2
66°
42°
3
75°
54°
4
78°
59°
5
73°
54°
6
57°
41°
7
65°
44°
8
71°
52°
9
76°
53°
10
73°
54°
11
75°
55°
12
74°
58°
13
75°
58°
14
77°
57°
15
74°
55°
16
76°
60°
17
72°
59°
18
70°
60°
19
76°
60°
20
74°
58°
21
77°
53°
22
69°
52°
23
70°
53°
24
69°
55°
25
68°
53°
26
69°
53°
27
70°
54°
28
71°
55°
29
72°
59°
30
74°
62°
31
73°
63°
1
73°
61°
2
74°
58°
3
74°
63°
4
75°
64°
5
74°
65°
6
74°
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 57° to 78°, with overnight lows between 41° and 65°. The average high for May is 72° 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.