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Over 250 million face dangerous heat dome into 4th of July weekend. Click for details. Chevron right

Monmouth, IL

80°F
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Monmouth

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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
Extreme Heat Warning

July

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
28
87°
68°
29
Breezy and very warm
89°
74°
30
Mostly sunny, hot and humid
94°
72°
1
Mostly sunny, hot and humid
92°
73°
2
A t-storm around in the p.m.
91°
70°
3
A t-storm; very warm, humid
88°
71°
4
Very warm and very humid
89°
67°
5
Humid with a t-storm possible
87°
66°
6
Sunny and less humid
85°
63°
7
Mostly sunny and humid
82°
64°
8
Mostly sunny and humid
85°
66°
9
Afternoon rain
86°
66°
10
Occasional morning rain
85°
65°
11
Mostly sunny and less humid
85°
65°
12
Sunshine
84°
64°
13
Sunshine and less humid
85°
63°
14
Mostly sunny
80°
60°
15
Mostly sunny
80°
62°
16
Sunny
83°
65°
17
Plenty of sun
86°
67°
18
Increasing clouds
87°
68°
19
Cloudy
87°
67°
20
Plenty of sunshine
84°
66°
21
Mostly sunny and humid
87°
68°
22
Sunny and humid
88°
68°
23
Sunny, warm and humid
88°
69°
24
Warm and humid with sunshine
89°
69°
25
Mostly sunny, warm and humid
89°
67°
26
Mostly sunny, warm and humid
88°
68°
27
Partly sunny, warm and humid
88°
69°
28
Mostly sunny, warm and humid
89°
68°
29
Partly sunny and less humid
88°
68°
30
Mostly sunny; low humidity
88°
67°
31
Mostly cloudy
87°
67°
1
Showers around in the p.m.
85°
66°

Temperature Graph

°F
100° 90° 80° 70° 60° Jul
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

July Weather in Monmouth

Monmouth's July 2026 forecast shows daily high temperatures ranging from 80° to 94°, with overnight lows between 60° and 74°. The average high for July is 87° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Monmouth. See also: August | September | October.

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