S
M
T
W
T
F
S
26
64°
43°
27
56°
46°
28
54°
46°
29
62°
44°
30
69°
46°
1
72°
55°
2
79°
58°
3
85°
57°
4
80°
54°
5
76°
52°
6
74°
48°
7
73°
45°
8
65°
47°
9
71°
46°
10
75°
50°
11
72°
47°
12
72°
47°
13
69°
48°
14
66°
43°
15
69°
45°
16
65°
46°
17
63°
46°
18
62°
45°
19
65°
45°
20
65°
48°
21
62°
47°
22
62°
43°
23
67°
44°
24
71°
48°
25
72°
50°
26
72°
50°
27
67°
48°
28
68°
46°
29
68°
48°
30
71°
51°
31
67°
49°
1
63°
49°
2
66°
48°
3
67°
49°
4
63°
48°
5
65°
47°
6
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Index
Index's May 2026 forecast shows daily high temperatures ranging from 62° to 85°, with overnight lows between 43° and 58°. The average high for May is 69° 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 Index. See also: June | July | August.
