S
M
T
W
T
F
S
26
64°
52°
27
69°
45°
28
72°
40°
29
76°
53°
30
72°
53°
1
59°
48°
2
57°
52°
3
66°
45°
4
79°
45°
5
82°
52°
6
84°
59°
7
73°
53°
8
73°
48°
9
77°
51°
10
85°
60°
11
71°
50°
12
73°
41°
13
79°
52°
14
77°
55°
15
75°
48°
16
85°
52°
17
92°
61°
18
94°
69°
19
93°
66°
20
92°
67°
21
92°
67°
22
80°
65°
23
85°
69°
24
80°
69°
25
81°
70°
26
84°
69°
27
85°
69°
28
81°
64°
29
78°
60°
30
72°
61°
31
75°
59°
1
83°
64°
2
84°
65°
3
83°
64°
4
82°
65°
5
84°
68°
6
85°
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 72° to 85°, with overnight lows between 59° and 70°. The average high for May is 81° with an average low of 66°. 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.