S
M
T
W
T
F
S
26
65°
31°
27
73°
37°
28
69°
46°
29
56°
46°
30
49°
39°
1
53°
31°
2
48°
36°
3
54°
38°
4
67°
45°
5
70°
44°
6
49°
38°
7
54°
36°
8
55°
38°
9
61°
47°
10
57°
40°
11
54°
36°
12
53°
39°
13
54°
43°
14
59°
44°
15
61°
47°
16
59°
44°
17
59°
43°
18
58°
47°
19
64°
44°
20
60°
40°
21
61°
41°
22
62°
41°
23
63°
42°
24
69°
46°
25
72°
49°
26
73°
51°
27
68°
46°
28
69°
43°
29
65°
43°
30
74°
52°
31
75°
53°
1
75°
50°
2
70°
49°
3
74°
53°
4
76°
54°
5
77°
55°
6
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Morristown
Morristown's May 2026 forecast shows daily high temperatures ranging from 49° to 77°, with overnight lows between 36° and 55°. The average high for May is 64° with an average low of 45°. 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 Morristown. See also: June | July | August.