Chatham, IL Weather Forecast & Alerts

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

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Current Conditions — Chatham, IL

SPRINGFIELD (KSPI)

Partly Cloudy

62.6 F
Humidity:29%
Wind Speed:W 5.7 mph
Barometer:30.03 in
Dewpoint:30.2 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 30 2026, 01:00 PM CDT
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5-Day Forecast — Chatham, IL

Thursday

High 64 °F
Chance of Rain Showers
Thursday
Night
Low 41 °F
Chance of T-storms
Friday

High 60 °F
Slight Chance of Showers
Friday
Night
Low 39 °F
Partly Cloudy
Saturday

High 59 °F
Partly Sunny
Saturday
Night
Low 39 °F
Mostly Clear
Sunday

High 71 °F
Mostly Sunny
Sunday
Night
Low 53 °F
Scattered T-storms Likely
Monday

High 77 °F
Chance of Scattered T-storms

Detailed Forecast — Chatham, IL

Thursday
Chance of Rain Showers. High near 64°F. Wind 9 to 12 mph, with gusts as high as 17 mph.
Thursday Night
Chance of Thunderstorms. Low around 41°F. Wind 6 to 7 mph, with gusts as high as 13 mph.
Friday
Slight Chance of Showers. High near 60°F. Wind 7 to 10 mph, with gusts as high as 16 mph.
Friday Night
Partly Cloudy. Low around 39°F. Wind 3 to 7 mph, with gusts as high as 12 mph.
Saturday
Partly Sunny. High near 59°F. Wind 7 to 10 mph, with gusts as high as 16 mph.
Saturday Night
Mostly Clear. Low around 39°F. Wind around 5 mph, with gusts as high as 8 mph.
Sunday
Mostly Sunny. High near 71°F. Wind 15 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Scattered Thunderstorms Likely. Low around 53°F. Wind around 12 mph, with gusts as high as 20 mph.
Monday
Chance of Scattered Thunderstorms. High near 77°F. Wind 13 to 17 mph, with gusts as high as 25 mph.
Monday Night
Chance of Showers. Low around 53°F. Wind around 10 mph, with gusts as high as 16 mph.
Tuesday
Thunderstorms Likely. High near 73°F. Wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Thunderstorms Likely. Low around 50°F. Wind around 12 mph, with gusts as high as 17 mph.
Wednesday
Chance of Thunderstorms. High near 68°F. Wind 13 to 14 mph, with gusts as high as 21 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 30, 2026

Observation History — Chatham, 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)
01:00 PM CDT W 5.7 10.00 Partly Cloudy -- 62.6 30.2 29% NA NA 30.03 1016.9
12:50 PM CDT 10.00 Partly Cloudy -- 62.6 33.8 34% NA NA 30.04 1017.3
12:45 PM CDT 8.1 10.00 Mostly Clear -- 62.6 32.0 32% NA NA 30.04 1017.3
12:35 PM CDT 4.6 10.00 Clear -- 62.6 33.8 34% NA NA 30.04 1017.3
12:20 PM CDT 10.4 G 16.1 10.00 Clear -- 60.8 32.0 34% NA NA 30.05 1017.6
12:05 PM CDT 5.7 10.00 Clear -- 60.8 32.0 34% NA NA 30.05 1017.6
12:00 PM CDT W 10.4 G 16.1 10.00 Clear -- 60.8 33.8 36% NA NA 30.05 1017.6
11:35 AM CDT SW 6.9 10.00 Clear -- 60.8 33.8 36% NA NA 30.05 1017.6
11:30 AM CDT W 8.1 10.00 Clear -- 60.8 33.8 36% NA NA 30.05 1017.6
11:25 AM CDT 9.2 10.00 Clear -- 60.8 32.0 34% NA NA 30.06 1017.9
11:20 AM CDT W 9.2 10.00 Clear -- 60.8 32.0 34% NA NA 30.06 1017.9
11:05 AM CDT 12.7 10.00 Clear -- 60.8 33.8 36% NA NA 30.06 1017.9
10:50 AM CDT 9.2 10.00 Clear -- 59.0 30.2 33% NA NA 30.06 1017.9
10:45 AM CDT 8.1 10.00 Clear -- 59.0 32.0 36% NA NA 30.06 1017.9
10:35 AM CDT W 8.1 10.00 Clear -- 59.0 32.0 36% NA NA 30.06 1017.9
10:25 AM CDT SW 6.9 10.00 Clear -- 57.2 33.8 41% NA NA 30.06 1017.9
10:20 AM CDT 5.7 10.00 Clear -- 57.2 33.8 41% NA NA 30.06 1017.9
10:10 AM CDT SW 6.9 10.00 Clear -- 57.2 33.8 41% NA NA 30.06 1017.9
10:00 AM CDT 5.7 10.00 Clear -- 57.2 % NA NA 30.07 1018.3
09:50 AM CDT 6.9 10.00 Clear -- 57.2 32.0 38% NA NA 30.07 1018.3
09:45 AM CDT 6.9 10.00 Clear -- 55.4 33.8 44% NA NA 30.06 1017.9
09:35 AM CDT W 4.6 10.00 Clear -- 55.4 33.8 44% NA NA 30.06 1017.9
09:25 AM CDT 0.0 10.00 Clear -- 55.4 33.8 44% NA NA 30.06 1017.9
09:20 AM CDT 4.6 10.00 Clear -- 55.4 35.6 47% NA NA 30.06 1017.9

Regional Weather Observation

SPRINGFIELD (KSPI)

Partly Cloudy
62.6 F

JACKSONVILLE (KIJX)

Mostly Cloudy
60.3 F

TAYLORVILLE (KTAZ)

Partly Cloudy
60.8 F

LINCOLN (KAAA)

Mostly Cloudy
63.0 F

MOUNT STERLING (KI63)

Cloudy
55.8 F

LITCHFIELD MUNI (K3LF)

Clear
59.9 F
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