S
M
T
W
T
F
S
31
73°
43°
1
68°
47°
2
78°
46°
3
81°
56°
4
82°
52°
5
88°
56°
6
83°
67°
7
85°
59°
8
75°
56°
9
80°
61°
10
79°
66°
11
85°
67°
12
87°
69°
13
85°
64°
14
84°
65°
15
82°
64°
16
77°
64°
17
79°
65°
18
75°
64°
19
80°
62°
20
80°
65°
21
79°
64°
22
80°
66°
23
75°
66°
24
77°
62°
25
75°
65°
26
79°
65°
27
78°
68°
28
82°
67°
29
79°
64°
30
76°
63°
1
77°
65°
2
78°
65°
3
77°
63°
4
78°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Holtsville
Holtsville's June 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 56° and 69°. The average high for June is 80° with an average low of 64°. 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 Holtsville. See also: July | August | September.
