S
M
T
W
T
F
S
27
66°
46°
28
73°
45°
29
71°
58°
30
77°
50°
1
64°
39°
2
57°
38°
3
57°
44°
4
54°
35°
5
55°
39°
6
59°
46°
7
61°
44°
8
60°
42°
9
57°
39°
10
56°
41°
11
53°
38°
12
55°
34°
13
48°
33°
14
49°
38°
15
58°
40°
16
58°
40°
17
57°
39°
18
58°
39°
19
56°
38°
20
56°
38°
21
51°
36°
22
46°
32°
23
54°
38°
24
56°
37°
25
55°
35°
26
47°
32°
27
45°
34°
28
50°
36°
29
49°
36°
30
52°
35°
31
50°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Mercer
Mercer's October 2026 forecast shows daily high temperatures ranging from 45° to 77°, with overnight lows between 32° and 58°. The average high for October is 55° with an average low of 39°. 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 Mercer. See also: November | December | January.
