S
M
T
W
T
F
S
26
88°
72°
27
90°
73°
28
90°
74°
29
83°
68°
30
69°
62°
1
62°
50°
2
75°
49°
3
81°
56°
4
81°
62°
5
84°
71°
6
80°
58°
7
74°
53°
8
80°
60°
9
79°
63°
10
83°
64°
11
81°
65°
12
84°
64°
13
85°
68°
14
84°
66°
15
86°
64°
16
81°
67°
17
82°
66°
18
80°
67°
19
79°
67°
20
82°
68°
21
84°
66°
22
84°
62°
23
81°
62°
24
82°
64°
25
82°
66°
26
83°
63°
27
82°
63°
28
83°
64°
29
84°
69°
30
85°
69°
31
84°
70°
1
84°
70°
2
85°
69°
3
86°
71°
4
88°
71°
5
85°
70°
6
83°
71°
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 74° to 88°, with overnight lows between 49° and 71°. The average high for May is 82° with an average low of 65°. 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.