S
M
T
W
T
F
S
27
70°
47°
28
66°
57°
29
75°
54°
30
74°
49°
1
84°
64°
2
72°
50°
3
66°
42°
4
71°
40°
5
64°
40°
6
64°
34°
7
73°
38°
8
69°
42°
9
70°
37°
10
70°
43°
11
64°
53°
12
73°
60°
13
81°
62°
14
67°
48°
15
64°
57°
16
61°
38°
17
49°
32°
18
59°
37°
19
65°
42°
20
67°
43°
21
69°
46°
22
65°
44°
23
61°
43°
24
61°
44°
25
55°
36°
26
61°
39°
27
59°
30°
28
50°
29°
29
50°
29°
30
51°
33°
31
58°
33°
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 49° to 81°, with overnight lows between 29° and 62°. The average high for October is 61° with an average low of 41°. 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.
