S
M
T
W
T
F
S
27
73°
63°
28
71°
63°
29
72°
62°
30
74°
59°
1
68°
47°
2
65°
40°
3
71°
51°
4
71°
40°
5
78°
42°
6
86°
52°
7
77°
45°
8
75°
52°
9
79°
61°
10
86°
60°
11
81°
49°
12
63°
45°
13
56°
45°
14
57°
49°
15
62°
39°
16
54°
36°
17
52°
36°
18
59°
39°
19
59°
42°
20
62°
41°
21
58°
34°
22
63°
41°
23
55°
37°
24
61°
41°
25
62°
39°
26
55°
39°
27
58°
33°
28
49°
36°
29
53°
38°
30
52°
38°
31
57°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Harrisburg
Harrisburg's October 2026 forecast shows daily high temperatures ranging from 49° to 86°, with overnight lows between 33° and 61°. The average high for October is 61° with an average low of 42°. 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 Harrisburg. See also: November | December | January.
