S
M
T
W
T
F
S
27
69°
35°
28
60°
44°
29
62°
35°
30
56°
44°
1
65°
32°
2
63°
32°
3
51°
31°
4
50°
37°
5
53°
38°
6
57°
42°
7
62°
42°
8
62°
43°
9
56°
42°
10
59°
39°
11
59°
32°
12
58°
29°
13
47°
32°
14
47°
29°
15
48°
31°
16
48°
30°
17
49°
37°
18
50°
38°
19
57°
39°
20
56°
40°
21
55°
36°
22
56°
28°
23
54°
30°
24
45°
31°
25
48°
24°
26
43°
30°
27
45°
34°
28
42°
31°
29
43°
34°
30
Hist. Avg.
47°
29°
31
Hist. Avg.
46°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Mercer
Mercer's October 2026 forecast shows daily high temperatures ranging from 42° to 69°, with overnight lows between 24° and 44°. The average high for October is 54° with an average low of 35°. 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.
