S
M
T
W
T
F
S
31
82°
64°
1
88°
61°
2
81°
57°
3
81°
55°
4
76°
65°
5
86°
63°
6
87°
67°
7
81°
67°
8
84°
66°
9
88°
71°
10
91°
69°
11
90°
71°
12
89°
66°
13
83°
61°
14
83°
59°
15
78°
57°
16
75°
56°
17
94°
72°
18
82°
61°
19
83°
65°
20
85°
62°
21
81°
57°
22
79°
64°
23
87°
68°
24
89°
67°
25
88°
66°
26
81°
66°
27
79°
65°
28
80°
67°
29
81°
67°
30
83°
66°
1
83°
66°
2
82°
67°
3
85°
67°
4
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Walnut
Walnut's June 2026 forecast shows daily high temperatures ranging from 75° to 94°, with overnight lows between 56° and 72°. The average high for June is 84° with an average low of 65°. 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 Walnut. See also: July | August | September.