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Monmouth, IL

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Monmouth, IL Weather
Today WinterCast Local {stormName} Tracker Hourly 10-Day Radar MinuteCast® Monthly Air Quality Health & Activities

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Today Hourly 10-Day Radar MinuteCast®

Monthly

Air Quality Health & Activities

October

January February March April May June July August September October November December

2026

2025 2026 2027

10-Day

S
M
T
W
T
F
S
27
A t-storm around in the p.m.
78°
44°
28
Rather cloudy with t-storms
73°
44°
29
Partly sunny
68°
46°
30
Partly sunny
68°
53°
1
Sunny to partly cloudy
71°
53°
2
Warm with clouds and sunshine
76°
52°
3
Partly sunny and warm
76°
53°
4
Warm with plenty of sunshine
77°
52°
5
Mostly sunny and warm
77°
53°
6
Mostly sunny
76°
51°
7
Warm with partial sunshine
77°
42°
8
Cloudy with showers
74°
41°
9
Mostly sunny
63°
40°
10
Periods of rain
61°
40°
11
Sunny spells
63°
45°
12
Clouds and sunshine
62°
50°
13
Mostly cloudy
67°
52°
14
Cloudy
73°
42°
15
Overcast with thunderstorms
74°
42°
16
Mostly sunny
67°
41°
17
Mostly sunny
67°
37°
18
Mostly sunny and cooler
59°
40°
19
Sunny to partly cloudy
61°
37°
20
Sunshine
58°
45°
21
Partly sunny
62°
45°
22
Mostly sunny
66°
43°
23
Mostly sunny
68°
40°
24
Mostly sunny and cooler
59°
34°
25
Some sun
56°
44°
26
Mostly sunny
57°
43°
27
Occasional rain
60°
33°
28
Rain most of the time
54°
31°
29
Cloudy, a little rain; windy
52°
30°
30
Decreasing clouds
49°
32°
31
Mostly cloudy
58°
42°

Temperature Graph

°F
80° 68° 56° 44° 32° Oct
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo

October Weather in Monmouth

Monmouth's October 2026 forecast shows daily high temperatures ranging from 49° to 78°, with overnight lows between 30° and 53°. The average high for October is 66° with an average low of 43°. 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 Monmouth. See also: November | December | January.

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Weather Near Monmouth:

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