S
M
T
W
T
F
S
26
74°
38°
27
73°
34°
28
69°
35°
29
65°
34°
30
46°
37°
1
56°
37°
2
69°
38°
3
75°
47°
4
77°
48°
5
56°
33°
6
50°
32°
7
74°
45°
8
80°
47°
9
79°
48°
10
70°
47°
11
76°
49°
12
83°
52°
13
82°
48°
14
80°
51°
15
75°
44°
16
79°
49°
17
75°
48°
18
79°
50°
19
81°
48°
20
77°
50°
21
78°
47°
22
72°
50°
23
81°
51°
24
72°
49°
25
71°
46°
26
73°
48°
27
77°
52°
28
76°
53°
29
74°
53°
30
74°
52°
31
73°
50°
1
75°
50°
2
77°
52°
3
80°
53°
4
80°
54°
5
76°
54°
6
77°
52°
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 50° to 83°, with overnight lows between 32° and 54°. The average high for May is 75° with an average low of 48°. 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.