S
M
T
W
T
F
S
26
90°
67°
27
90°
74°
28
89°
72°
29
74°
62°
30
68°
58°
1
69°
54°
2
N/A
3
85°
62°
4
84°
67°
5
85°
68°
6
74°
57°
7
72°
51°
8
81°
59°
9
85°
64°
10
77°
63°
11
78°
59°
12
85°
61°
13
86°
63°
14
90°
65°
15
87°
67°
16
82°
62°
17
76°
65°
18
77°
66°
19
78°
66°
20
82°
65°
21
82°
60°
22
78°
59°
23
78°
60°
24
79°
63°
25
77°
61°
26
78°
60°
27
79°
61°
28
80°
62°
29
79°
66°
30
81°
68°
31
80°
69°
1
82°
69°
2
83°
68°
3
84°
69°
4
86°
70°
5
83°
70°
6
83°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Index
Index's May 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 51° and 70°. The average high for May is 81° with an average low of 64°. 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 Index. See also: June | July | August.
