S
M
T
W
T
F
S
27
66°
46°
28
73°
45°
29
71°
49°
30
75°
57°
1
63°
38°
2
59°
30°
3
57°
30°
4
60°
37°
5
58°
28°
6
74°
46°
7
67°
37°
8
62°
36°
9
66°
29°
10
85°
52°
11
84°
59°
12
69°
50°
13
54°
47°
14
50°
44°
15
48°
45°
16
45°
26°
17
57°
25°
18
68°
42°
19
65°
29°
20
66°
33°
21
69°
36°
22
71°
34°
23
74°
48°
24
76°
57°
25
59°
45°
26
47°
38°
27
53°
37°
28
65°
51°
29
55°
27°
30
51°
29°
31
58°
48°
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 51° to 58°, with overnight lows between 29° and 48°. 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.
