St. Joseph, IL Weather Forecast & Alerts

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

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Current Conditions — Saint Joseph, IL

RANTOUL (KTIP)

Clear

57.7 F
Humidity:74%
Wind Speed:SW 10.3 mph
Barometer:29.96 in
Dewpoint:49.6 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 22 2026, 03:55 AM CDT
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5-Day Forecast — Saint Joseph, IL

Wednesday

High 80 °F
Mostly Cloudy
Wednesday
Night
Low 57 °F
Partly Cloudy
Thursday

High 80 °F
Mostly Sunny
Thursday
Night
Low 62 °F
Chance of T-storms
Friday

High 75 °F
T-storms
Friday
Night
Low 53 °F
Chance of Showers
Saturday

High 73 °F
Partly Sunny
Saturday
Night
Low 50 °F
Partly Cloudy
Sunday

High 75 °F
Partly Sunny

Detailed Forecast — Saint Joseph, IL

Wednesday
Mostly Cloudy. High near 80°F. Wind 7 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Partly Cloudy. Low around 57°F. Wind 5 to 7 mph, with gusts as high as 14 mph.
Thursday
Mostly Sunny. High near 80°F. Wind 9 to 20 mph, with gusts as high as 26 mph.
Thursday Night
Chance of Thunderstorms. Low around 62°F. Wind around 14 mph, with gusts as high as 22 mph.
Friday
Thunderstorms. High near 75°F. Wind 9 to 17 mph, with gusts as high as 25 mph.
Friday Night
Chance of Showers. Low around 53°F. Wind around 6 mph, with gusts as high as 10 mph.
Saturday
Partly Sunny. High near 73°F. Wind 9 to 10 mph, with gusts as high as 15 mph.
Saturday Night
Partly Cloudy. Low around 50°F. Wind around 6 mph, with gusts as high as 10 mph.
Sunday
Partly Sunny. High near 75°F. Wind around 10 mph, with gusts as high as 16 mph.
Sunday Night
Chance of Thunderstorms. Low around 55°F. Wind around 14 mph, with gusts as high as 21 mph.
Monday
Thunderstorms Likely. High near 75°F. Wind 15 to 21 mph, with gusts as high as 26 mph.
Monday Night
Chance of Rain. Low around 53°F. Wind around 14 mph, with gusts as high as 20 mph.
Tuesday
Mostly Cloudy. High near 68°F. Wind 10 to 15 mph, with gusts as high as 21 mph.
IL Radar
Current Radar • IL
Day 1 Outlook • April 22, 2026

Observation History — Saint Joseph, 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)
03:55 AM CDT SW 10.3 10.00 Clear -- 57.7 49.6 74% NA NA 29.96 1014.6
03:35 AM CDT SW 10.3 10.00 Clear -- 58.1 49.5 73% NA NA 29.96 1014.6
03:15 AM CDT SW 11.4 10.00 Clear -- 58.6 49.8 72% NA NA 29.96 1014.6
02:55 AM CDT SW 9.2 10.00 Clear -- 59.2 49.6 71% NA NA 29.95 1014.2
02:35 AM CDT SW 9.2 10.00 Clear -- 60.6 50.0 68% NA NA 29.95 1014.2
02:15 AM CDT 10.3 10.00 Partly Cloudy -- 61.0 49.5 66% NA NA 29.96 1014.6
01:55 AM CDT SW 8.1 10.00 Partly Cloudy -- 61.0 48.7 64% NA NA 29.96 1014.6
01:35 AM CDT SW 11.4 10.00 Partly Cloudy -- 61.7 47.8 60% NA NA 29.96 1014.6
01:15 AM CDT SW 13.9 10.00 Mostly Cloudy -- 62.2 47.5 58% NA NA 29.96 1014.6
12:55 AM CDT SW 13.9 10.00 Clear -- 62.6 47.7 58% NA NA 29.96 1014.6
12:35 AM CDT SW 12.8 10.00 Partly Cloudy -- 63.5 47.8 57% NA NA 29.96 1014.6
12:15 AM CDT SW 10.3 10.00 Mostly Cloudy -- 64.4 48.6 56% NA NA 29.96 1014.6
11:55 PM CDT SW 10.3 10.00 Partly Cloudy -- 64.6 49.5 58% NA NA 29.95 1014.2
11:35 PM CDT SW 12.8 10.00 Partly Cloudy -- 65.1 50.5 59% NA NA 29.95 1014.2
11:15 PM CDT SW 12.8 10.00 Mostly Cloudy -- 65.7 51.4 60% NA NA 29.95 1014.2
10:55 PM CDT SW 12.8 10.00 Partly Cloudy -- 65.8 51.4 60% NA NA 29.95 1014.2
10:35 PM CDT SW 10.3 10.00 Partly Cloudy -- 66.4 51.6 59% NA NA 29.95 1014.2
10:15 PM CDT SW 10.3 10.00 Partly Cloudy -- 66.7 51.3 57% NA NA 29.95 1014.2
09:55 PM CDT SW 9.2 10.00 Partly Cloudy -- 67.5 51.3 56% NA NA 29.96 1014.6
09:35 PM CDT SW 11.4 10.00 Mostly Cloudy -- 69.1 51.1 53% NA NA 29.95 1014.2
09:15 PM CDT SW 11.4 10.00 Mostly Cloudy -- 70.0 51.1 51% NA NA 29.95 1014.2
08:55 PM CDT SW 11.4 G 18.3 10.00 Cloudy -- 71.1 51.1 49% NA 70.2 29.95 1014.2
08:35 PM CDT SW 11.4 G 17.2 10.00 Cloudy -- 72.0 51.1 48% NA 71.1 29.95 1014.2
08:15 PM CDT SW 9.2 10.00 Cloudy -- 72.3 51.6 48% NA 71.6 29.94 1013.9

Regional Weather Observation

RANTOUL (KTIP)

Clear
57.7 F

CHAMPAIGN/URBANA (KCMI)

Clear
59.0 F

BLOOMINGTON/NORM (KBMI)

Clear
62.6 F

PONTIAC (KPNT)

NULL
61.7 F

DANVILLE (KDNV)

Clear
61.7 F

DECATUR (KDEC)

Clear
62.6 F
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