S
M
T
W
T
F
S
26
60°
44°
27
74°
44°
28
71°
54°
29
58°
45°
30
54°
39°
1
49°
37°
2
45°
32°
3
59°
32°
4
72°
46°
5
68°
50°
6
58°
41°
7
57°
38°
8
64°
41°
9
69°
50°
10
65°
46°
11
67°
36°
12
69°
40°
13
65°
45°
14
62°
42°
15
68°
37°
16
75°
48°
17
83°
59°
18
87°
64°
19
87°
64°
20
66°
48°
21
65°
48°
22
59°
50°
23
74°
56°
24
70°
57°
25
74°
57°
26
78°
56°
27
75°
63°
28
75°
54°
29
78°
48°
30
71°
45°
31
74°
51°
1
73°
50°
2
73°
49°
3
75°
54°
4
77°
56°
5
81°
61°
6
78°
59°
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 71° to 81°, with overnight lows between 45° and 61°. The average high for May is 75° with an average low of 53°. 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.
