S
M
T
W
T
F
S
26
82°
64°
27
80°
62°
28
82°
55°
29
90°
65°
30
82°
69°
1
70°
58°
2
67°
54°
3
74°
46°
4
81°
48°
5
83°
56°
6
88°
63°
7
78°
70°
8
74°
64°
9
69°
62°
10
83°
65°
11
87°
65°
12
73°
59°
13
77°
58°
14
81°
61°
15
82°
52°
16
88°
61°
17
92°
66°
18
88°
66°
19
90°
67°
20
89°
67°
21
89°
69°
22
91°
70°
23
88°
70°
24
89°
70°
25
91°
69°
26
89°
70°
27
87°
69°
28
88°
70°
29
90°
68°
30
86°
70°
31
87°
70°
1
86°
68°
2
88°
66°
3
86°
69°
4
89°
68°
5
90°
70°
6
90°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sycamore
Sycamore's May 2026 forecast shows daily high temperatures ranging from 86° to 91°, with overnight lows between 66° and 70°. The average high for May is 89° with an average low of 69°. 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 Sycamore. See also: June | July | August.
