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
67°
35°
3
76°
43°
4
75°
48°
5
56°
35°
6
37°
26°
7
70°
40°
8
73°
47°
9
81°
42°
10
74°
47°
11
85°
53°
12
85°
52°
13
83°
53°
14
81°
52°
15
77°
52°
16
85°
51°
17
79°
52°
18
83°
53°
19
77°
46°
20
71°
47°
21
72°
48°
22
71°
49°
23
71°
51°
24
72°
51°
25
72°
49°
26
73°
50°
27
79°
52°
28
78°
52°
29
76°
53°
30
76°
53°
31
75°
52°
1
75°
53°
2
77°
54°
3
82°
54°
4
83°
55°
5
75°
53°
6
77°
55°
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 37° to 85°, with overnight lows between 26° and 55°. The average high for May is 76° with an average low of 50°. 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.