S
M
T
W
T
F
S
26
67°
34°
27
73°
35°
28
65°
34°
29
57°
43°
30
46°
43°
1
58°
35°
2
44°
33°
3
53°
39°
4
64°
33°
5
75°
46°
6
63°
49°
7
62°
43°
8
56°
36°
9
60°
32°
10
66°
44°
11
60°
43°
12
57°
37°
13
56°
36°
14
65°
46°
15
61°
52°
16
76°
50°
17
78°
51°
18
67°
46°
19
89°
47°
20
86°
61°
21
65°
47°
22
69°
38°
23
66°
41°
24
56°
46°
25
59°
48°
26
77°
56°
27
78°
53°
28
61°
48°
29
61°
46°
30
62°
41°
31
61°
49°
1
66°
47°
2
64°
47°
3
65°
51°
4
69°
52°
5
67°
49°
6
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Knox
Knox's May 2026 forecast shows daily high temperatures ranging from 56° to 78°, with overnight lows between 41° and 56°. The average high for May is 65° 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 Knox. See also: June | July | August.
