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Colchester, IL

70°F
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70°
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Colchester, 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 Watch

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
Decreasing clouds and humid
91°
72°
29
Mostly cloudy, hot and humid
93°
74°
30
Hot and humid with hazy sun
93°
72°
1
Hazy, hot and humid
93°
73°
2
A t-storm or two; hot, humid
92°
71°
3
A stray morning t-storm; hot
93°
70°
4
A shower possible; hot, humid
94°
68°
5
A t-storm around in the a.m.
89°
67°
6
A couple of t-storms; humid
88°
67°
7
Mostly sunny and less humid
88°
66°
8
Mostly cloudy
87°
67°
9
Partly sunny
89°
69°
10
Humid with sunshine
86°
65°
11
Decreasing clouds
90°
69°
12
Sunny
88°
68°
13
Less humid with plenty of sun
89°
63°
14
Sunshine and some clouds
82°
61°
15
Mostly sunny
82°
62°
16
Abundant sunshine
84°
63°
17
A bright blue sky
87°
67°
18
Clouds and sunshine
89°
69°
19
Cloudy
89°
69°
20
Sunshine
88°
67°
21
A t-storm around in the p.m.
89°
69°
22
Humid; a shower in the a.m.
89°
70°
23
Sunshine and hot
90°
70°
24
Sunny and hot
91°
69°
25
Mostly sunny, hot and humid
91°
69°
26
Mostly sunny and humid
90°
70°
27
Partly sunny
90°
70°
28
Mostly sunny, hot and humid
91°
69°
29
Increasing clouds and hot
91°
69°
30
Sunshine; hot, low humidity
90°
68°
31
Increasing clouds
89°
68°
1
Afternoon rain
89°
70°

Temperature Graph

°F
100° 92° 84° 76° 68° 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 Colchester

Colchester's July 2026 forecast shows daily high temperatures ranging from 82° to 94°, with overnight lows between 61° and 74°. The average high for July is 89° with an average low of 68°. 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 Colchester. See also: August | September | October.

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