S
M
T
W
T
F
S
31
101°
71°
1
94°
69°
2
89°
67°
3
87°
65°
4
90°
68°
5
85°
68°
6
81°
67°
7
88°
70°
8
89°
69°
9
92°
67°
10
94°
67°
11
93°
65°
12
90°
67°
13
91°
68°
14
88°
65°
15
93°
64°
16
83°
62°
17
80°
61°
18
80°
61°
19
82°
62°
20
84°
69°
21
89°
71°
22
87°
68°
23
86°
69°
24
89°
71°
25
90°
71°
26
92°
72°
27
92°
71°
28
93°
72°
29
93°
72°
30
92°
73°
1
94°
73°
2
95°
74°
3
96°
74°
4
94°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Harper
Harper's June 2026 forecast shows daily high temperatures ranging from 80° to 96°, with overnight lows between 61° and 74°. The average high for June is 89° with an average low of 68°. 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 Harper. See also: July | August | September.