S
M
T
W
T
F
S
31
80°
57°
1
75°
45°
2
80°
49°
3
85°
51°
4
89°
55°
5
90°
62°
6
91°
64°
7
86°
61°
8
77°
46°
9
83°
66°
10
85°
67°
11
96°
70°
12
94°
70°
13
90°
61°
14
91°
65°
15
78°
52°
16
78°
56°
17
81°
67°
18
90°
70°
19
82°
60°
20
83°
59°
21
84°
62°
22
78°
63°
23
83°
59°
24
83°
60°
25
85°
59°
26
84°
60°
27
87°
62°
28
86°
63°
29
86°
64°
30
85°
65°
1
86°
64°
2
89°
62°
3
82°
65°
4
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Monmouth Junction
Monmouth Junction's June 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 59° and 65°. The average high for June is 84° with an average low of 62°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Monmouth Junction. See also: July | August | September.