S
M
T
W
T
F
S
26
61°
39°
27
72°
36°
28
64°
36°
29
63°
48°
30
61°
46°
1
64°
39°
2
59°
45°
3
61°
43°
4
73°
37°
5
82°
45°
6
68°
54°
7
64°
45°
8
63°
39°
9
63°
46°
10
73°
48°
11
63°
45°
12
68°
39°
13
73°
46°
14
66°
48°
15
66°
46°
16
82°
41°
17
88°
54°
18
93°
57°
19
95°
63°
20
93°
64°
21
64°
54°
22
70°
50°
23
55°
50°
24
59°
50°
25
77°
55°
26
82°
50°
27
84°
62°
28
76°
53°
29
79°
53°
30
69°
46°
31
75°
55°
1
72°
51°
2
73°
51°
3
77°
56°
4
80°
59°
5
78°
59°
6
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Morris Plains
Morris Plains's May 2026 forecast shows daily high temperatures ranging from 69° to 84°, with overnight lows between 46° and 62°. The average high for May is 77° with an average low of 55°. 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 Morris Plains. See also: June | July | August.
