S
M
T
W
T
F
S
26
84°
60°
27
90°
68°
28
87°
62°
29
76°
56°
30
69°
52°
1
71°
46°
2
73°
45°
3
82°
60°
4
82°
66°
5
78°
60°
6
68°
46°
7
74°
51°
8
78°
56°
9
79°
55°
10
80°
59°
11
83°
58°
12
81°
58°
13
79°
56°
14
81°
57°
15
79°
63°
16
82°
63°
17
83°
64°
18
84°
64°
19
83°
65°
20
83°
65°
21
80°
64°
22
78°
63°
23
78°
59°
24
82°
65°
25
83°
65°
26
78°
58°
27
77°
58°
28
80°
63°
29
82°
65°
30
86°
66°
31
87°
67°
1
87°
67°
2
86°
66°
3
87°
68°
4
87°
65°
5
81°
62°
6
81°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Excelsior
Excelsior's May 2026 forecast shows daily high temperatures ranging from 68° to 87°, with overnight lows between 45° and 68°. The average high for May is 81° with an average low of 61°. 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 Excelsior. See also: June | July | August.