S
M
T
W
T
F
S
26
81°
52°
27
64°
44°
28
73°
57°
29
85°
61°
30
79°
56°
1
69°
55°
2
58°
43°
3
71°
44°
4
77°
48°
5
80°
57°
6
87°
65°
7
76°
57°
8
73°
60°
9
75°
61°
10
85°
61°
11
87°
59°
12
72°
56°
13
73°
55°
14
82°
50°
15
84°
55°
16
87°
67°
17
88°
67°
18
89°
66°
19
86°
68°
20
87°
68°
21
88°
67°
22
82°
66°
23
85°
67°
24
84°
68°
25
85°
66°
26
86°
67°
27
85°
67°
28
88°
65°
29
88°
69°
30
87°
69°
31
88°
68°
1
87°
68°
2
88°
69°
3
88°
69°
4
87°
68°
5
84°
69°
6
86°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cosby
Cosby's May 2026 forecast shows daily high temperatures ranging from 82° to 89°, with overnight lows between 55° and 69°. The average high for May is 86° with an average low of 67°. 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 Cosby. See also: June | July | August.
