S
M
T
W
T
F
S
27
67°
59°
28
62°
57°
29
72°
56°
30
70°
60°
1
74°
60°
2
79°
65°
3
70°
52°
4
63°
56°
5
71°
47°
6
63°
45°
7
66°
53°
8
72°
54°
9
68°
53°
10
68°
54°
11
67°
57°
12
69°
55°
13
67°
52°
14
65°
50°
15
68°
52°
16
69°
46°
17
67°
52°
18
67°
52°
19
58°
43°
20
58°
41°
21
56°
43°
22
56°
50°
23
57°
49°
24
60°
47°
25
58°
45°
26
56°
46°
27
55°
42°
28
54°
39°
29
54°
44°
30
62°
47°
31
63°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Holtsville
Holtsville's October 2026 forecast shows daily high temperatures ranging from 54° to 72°, with overnight lows between 39° and 57°. The average high for October is 63° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Holtsville. See also: November | December | January.
