Custer Park, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Custer Park, IL.

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Current Conditions — Custer Park, IL

JOLIET (KJOT)

Partly Cloudy

63.7 F
Humidity:80%
Wind Speed: 6.9 mph
Barometer:29.94 in
Dewpoint:57.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 05:15 AM CDT
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5-Day Forecast — Custer Park, IL

Wednesday

High 80 °F
Mostly Cloudy
Wednesday
Night
Low 59 °F
Partly Cloudy
Thursday

High 82 °F
Partly Sunny
Thursday
Night
Low 62 °F
Chance of T-storms
Friday

High 77 °F
T-storms Likely
Friday
Night
Low 53 °F
Partly Cloudy
Saturday

High 71 °F
Partly Sunny
Saturday
Night
Low 48 °F
Partly Cloudy
Sunday

High 73 °F
Partly Sunny

Detailed Forecast — Custer Park, IL

Wednesday
Mostly Cloudy. High near 80°F. Wind 8 to 13 mph, with gusts as high as 20 mph.
Wednesday Night
Partly Cloudy. Low around 59°F. Wind 5 to 7 mph, with gusts as high as 12 mph.
Thursday
Partly Sunny. High near 82°F. Wind 8 to 17 mph, with gusts as high as 25 mph.
Thursday Night
Chance of Thunderstorms. Low around 62°F. Wind around 13 mph, with gusts as high as 22 mph.
Friday
Thunderstorms Likely. High near 77°F. Wind 9 to 14 mph, with gusts as high as 22 mph.
Friday Night
Partly Cloudy. Low around 53°F. Wind around 6 mph, with gusts as high as 13 mph.
Saturday
Partly Sunny. High near 71°F. Wind around 9 mph, with gusts as high as 16 mph.
Saturday Night
Partly Cloudy. Low around 48°F. Wind around 5 mph, with gusts as high as 10 mph.
Sunday
Partly Sunny. High near 73°F. Wind 9 to 12 mph, with gusts as high as 20 mph.
Sunday Night
Chance of Rain. Low around 53°F. Wind around 13 mph, with gusts as high as 22 mph.
Monday
Thunderstorms Likely. High near 73°F. Wind 16 to 17 mph, with gusts as high as 26 mph.
Monday Night
Chance of Rain. Low around 50°F. Wind around 13 mph, with gusts as high as 21 mph.
Tuesday
Mostly Cloudy. High near 66°F. Wind 10 to 15 mph, with gusts as high as 22 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 22, 2026

Observation History — Custer Park, IL

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
05:15 AM CDT 6.9 10.00 Partly Cloudy -- 63.7 57.6 80% NA NA 29.94 1013.6
04:55 AM CDT 8.1 10.00 Mostly Cloudy -- 63.7 57.4 80% NA NA 29.92 1013.2
04:35 AM CDT SW 4.7 10.00 Partly Cloudy -- 62.4 56.8 82% NA NA 29.91 1012.9
04:15 AM CDT SW 3.4 10.00 Clear -- 62.1 56.5 82% NA NA 29.91 1012.9
03:35 AM CDT 3.4 10.00 Clear -- 62.8 56.5 80% NA NA 29.91 1012.9
03:15 AM CDT 0.0 10.00 Clear -- 61.2 56.3 84% NA NA 29.91 1012.9
02:55 AM CDT SW 3.4 10.00 Clear -- 58.3 55.6 91% NA NA 29.90 1012.5
02:35 AM CDT 0.0 10.00 Clear -- 54.7 54.5 99% NA NA 29.91 1012.9
02:15 AM CDT 0.0 10.00 Clear -- 53.8 53.8 100% NA NA 29.91 1012.9
01:55 AM CDT 0.0 7.00 Clear -- 54.1 54.1 100% NA NA 29.91 1012.9
01:35 AM CDT 0.0 10.00 Clear -- 55.4 55.4 100% NA NA 29.91 1012.9
01:15 AM CDT 0.0 7.00 Clear -- 54.5 54.5 100% NA NA 29.91 1012.9
12:55 AM CDT 0.0 10.00 Clear -- 54.9 54.7 99% NA NA 29.90 1012.5
12:35 AM CDT 0.0 10.00 Clear -- 55.2 54.1 96% NA NA 29.91 1012.9
12:15 AM CDT 0.0 10.00 Clear -- 56.5 55.0 95% NA NA 29.90 1012.5
11:55 PM CDT 0.0 10.00 Clear -- 57.6 55.2 92% NA NA 29.90 1012.5
11:35 PM CDT 0.0 10.00 Clear -- 56.5 54.5 93% NA NA 29.91 1012.9
11:15 PM CDT 0.0 10.00 Clear -- 58.5 54.1 86% NA NA 29.91 1012.9
10:55 PM CDT 0.0 10.00 Clear -- 60.3 55.0 83% NA NA 29.90 1012.5
10:35 PM CDT 0.0 10.00 Clear -- 61.9 55.0 78% NA NA 29.91 1012.9
10:15 PM CDT 3.4 10.00 Clear -- 60.1 55.9 86% NA NA 29.91 1012.9
09:55 PM CDT 0.0 10.00 Clear -- 59.4 56.3 90% NA NA 29.91 1012.9
09:35 PM CDT 0.0 10.00 Clear -- 60.1 56.8 89% NA NA 29.91 1012.9
09:15 PM CDT 0.0 10.00 Clear -- 64.0 57.2 78% NA NA 29.90 1012.5

Regional Weather Observation

JOLIET (KJOT)

Partly Cloudy
63.7 F

ROMEOVILLE/CHI (KLOT)

Cloudy
60.8 F

MORRIS-WASHBURN (KC09)

Partly Cloudy
61.3 F

CHICAGO/AURORA (KARR)

Clear
57.2 F

CHICAGO/DUPAGE (KDPA)

Partly Cloudy
59.0 F

SCHAUMBURG (K06C)

Partly Cloudy
59.5 F
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