S
M
T
W
T
F
S
26
76°
46°
27
70°
53°
28
64°
48°
29
59°
38°
30
58°
33°
1
55°
34°
2
59°
37°
3
69°
42°
4
80°
42°
5
55°
43°
6
57°
36°
7
64°
32°
8
68°
44°
9
78°
48°
10
67°
40°
11
69°
39°
12
81°
47°
13
70°
44°
14
74°
40°
15
79°
53°
16
80°
60°
17
84°
65°
18
74°
63°
19
72°
52°
20
68°
45°
21
71°
45°
22
68°
55°
23
78°
58°
24
80°
57°
25
82°
52°
26
83°
52°
27
89°
58°
28
85°
54°
29
83°
55°
30
85°
57°
31
81°
56°
1
77°
54°
2
86°
55°
3
84°
56°
4
81°
61°
5
83°
59°
6
83°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Knoxville
Knoxville's May 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 54° and 61°. The average high for May is 83° with an average low of 57°. 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 Knoxville. See also: June | July | August.
