S
M
T
W
T
F
S
26
55°
45°
27
72°
41°
28
63°
50°
29
59°
55°
30
66°
45°
1
68°
37°
2
59°
43°
3
63°
37°
4
79°
45°
5
84°
55°
6
72°
55°
7
66°
46°
8
73°
43°
9
75°
55°
10
81°
50°
11
63°
46°
12
72°
41°
13
75°
54°
14
63°
50°
15
72°
50°
16
84°
46°
17
88°
59°
18
95°
63°
19
97°
66°
20
91°
58°
21
61°
53°
22
59°
50°
23
61°
56°
24
74°
56°
25
73°
57°
26
74°
60°
27
76°
56°
28
78°
55°
29
76°
54°
30
78°
57°
31
82°
59°
1
84°
54°
2
77°
59°
3
74°
58°
4
78°
58°
5
75°
55°
6
77°
59°
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 59° to 97°, with overnight lows between 50° and 66°. The average high for May is 76° 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.
