Prairie Du Roche, IL Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Prairie Du Roche, IL.

Current Conditions — Prairie Du Roche, IL

CAHOKIA/ST LOUIS (KCPS)

Clear

44.6 F
Humidity:70%
Wind Speed:NW 8.1 mph
Barometer:30.05 in
Dewpoint:35.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:40.1 F
May 1 2026, 06:20 AM CDT
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5-Day Forecast — Prairie Du Roche, IL

Friday

High 64 °F
Partly Sunny
Friday
Night
Low 42 °F
Slight Chance of Rain
Saturday

High 60 °F
Partly Sunny
Saturday
Night
Low 39 °F
Mostly Clear
Sunday

High 75 °F
Forecast Missing
Sunday
Night
Low 55 °F
Mostly Clear
Monday

High 80 °F
Isolated T-storm
Monday
Night
Low 59 °F
Chance of Showers
Tuesday

High 73 °F
T-storms Likely

Detailed Forecast — Prairie Du Roche, IL

Friday
Partly Sunny. High near 64°F. Wind 5 to 8 mph, with gusts as high as 14 mph.
Friday Night
Slight Chance of Rain. Low around 42°F. Wind around 2 mph, with gusts as high as 6 mph.
Saturday
Partly Sunny. High near 60°F. Wind 3 to 8 mph, with gusts as high as 14 mph.
Saturday Night
Mostly Clear. Low around 39°F. Wind 1 to 2 mph, with gusts as high as 5 mph.
Sunday
Sunny. High near 75°F. Wind 7 to 12 mph, with gusts as high as 18 mph.
Sunday Night
Mostly Clear. Low around 55°F. Wind around 9 mph, with gusts as high as 15 mph.
Monday
Isolated T-storm. High near 80°F. Wind 10 to 15 mph, with gusts as high as 24 mph.
Monday Night
Chance of Showers. Low around 59°F. Wind around 10 mph, with gusts as high as 18 mph.
Tuesday
Thunderstorms Likely. High near 73°F. Wind 14 to 15 mph, with gusts as high as 22 mph.
Tuesday Night
Thunderstorms Likely. Low around 50°F. Wind around 9 mph, with gusts as high as 14 mph.
Wednesday
Chance of Thunderstorms. High near 68°F. Wind 10 to 12 mph, with gusts as high as 17 mph.
Wednesday Night
Partly Cloudy. Low around 44°F. Wind around 6 mph, with gusts as high as 10 mph.
Thursday
Partly Sunny. High near 68°F. Wind 7 to 12 mph, with gusts as high as 18 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • May 1, 2026

Observation History — Prairie Du Roche, 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)
06:20 AM CDT NW 8.1 10.00 Clear -- 44.6 35.6 70% 40.1 NA 30.05 1017.6
06:15 AM CDT NW 8.1 10.00 Clear -- 44.6 35.6 70% 40.1 NA 30.05 1017.6
06:10 AM CDT NW 6.9 10.00 Clear -- 44.6 33.8 66% 40.6 NA 30.05 1017.6
06:05 AM CDT NW 6.9 10.00 Clear -- 44.6 35.6 70% 40.6 NA 30.05 1017.6
06:00 AM CDT NW 6.9 10.00 Clear -- 46.4 35.6 66% 43.0 NA 30.05 1017.6
05:40 AM CDT 6.9 10.00 Clear -- 46.4 35.6 66% 43.0 NA 30.04 1017.3
05:35 AM CDT NW 8.1 10.00 Clear -- 46.4 35.6 66% 42.4 NA 30.04 1017.3
05:15 AM CDT NW 8.1 10.00 Clear -- 46.4 35.6 66% 42.4 NA 30.04 1017.3
05:05 AM CDT NW 9.2 10.00 Clear -- 48.2 37.4 66% 44.1 NA 30.03 1016.9
05:00 AM CDT 11.5 10.00 Clear -- 48.2 35.6 62% 43.3 NA 30.03 1016.9
04:45 AM CDT 12.7 10.00 Clear -- 48.2 37.4 66% 43.0 NA 30.03 1016.9
04:40 AM CDT 10.4 10.00 Clear -- 48.2 39.2 71% 43.7 NA 30.03 1016.9
04:35 AM CDT 9.2 10.00 Clear -- 48.2 39.2 71% 44.1 NA 30.03 1016.9
04:10 AM CDT 10.00 Clear -- 50.0 39.2 66% NA NA 30.03 1016.9
04:05 AM CDT NW 13.8 10.00 Clear -- 50.0 39.2 66% NA NA 30.03 1016.9
04:00 AM CDT NW 12.7 10.00 Clear -- 50.0 39.2 66% NA NA 30.03 1016.9
03:50 AM CDT NW 9.2 10.00 Clear -- 50.0 39.2 66% NA NA 30.03 1016.9
03:30 AM CDT NW 10.4 10.00 Clear -- 51.8 41.0 67% NA NA 30.02 1016.6
03:25 AM CDT NW 10.4 10.00 Mostly Clear -- 51.8 42.8 71% NA NA 30.02 1016.6
03:20 AM CDT 8.1 10.00 Mostly Clear -- 51.8 42.8 71% NA NA 30.02 1016.6
03:05 AM CDT NW 9.2 10.00 Mostly Cloudy -- 51.8 41.0 67% NA NA 30.02 1016.6
02:50 AM CDT 12.7 10.00 Cloudy -- 53.6 41.0 62% NA NA 30.02 1016.6
02:45 AM CDT NW 12.7 10.00 Cloudy -- 53.6 41.0 62% NA NA 30.02 1016.6
02:40 AM CDT 11.5 10.00 Cloudy -- 53.6 41.0 62% NA NA 30.02 1016.6

Regional Weather Observation

CAHOKIA/ST LOUIS (KCPS)

Clear
44.6 F

ST LOUIS (KSTL)

Clear
44.6 F

ST LOUIS/SPIRIT (KSUS)

Clear
42.8 F

ALTON/ST LOUIS R (KALN)

NULL
44.2 F

ST CHARLES (KSET)

Clear
44.6 F

SCOTT AFB/BELLEV (KBLV)

Clear
44.4 F
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