St. Jacob, IL Weather Forecast & Current Conditions

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St. Jacob, IL Weather Maps

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Saint Jacob Weather Map
UTC Time: 11/3/2026, 21:18
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

St. Jacob, IL Regional Weather

Expires:202611032200;;212110
ASUS43 KLOT 032110
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 PM CST TUE NOV 03 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.


ILZ079-100>102-032200-
SOUTHWEST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          RAIN      66  64  94 W6        29.83R TC  19           
BELLEVILLE     PTSUNNY   71  68  90 S14       29.79S TC  22           
CAHOKIA*       HVY RAIN  67  65  93 S7        29.81R VSB 1   TC  19   
SPARTA*        CLOUDY    73  63  69 S18       29.84S TC  23           
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

St. Jacob, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
65°/ 45° 18°/ 7°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Partly Cloudy
55°/ 35° 13°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Breezy with highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 5 to 10 mph with gusts up to 20 mph after midnight. Chance of rain near 100 percent.

Alton, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
65°/ 45° 18°/ 7°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Partly Cloudy
55°/ 35° 13°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Breezy with highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 5 to 10 mph with gusts up to 20 mph after midnight. Chance of rain near 100 percent.

Centralia, IL

Afternoon
Thunderstorms
72°/ 55° 22°/ 13°
100%
Wednesday
Mostly Cloudy
65°/ 42° 18°/ 6°
0%
Thursday
Sunny
68°/ 45° 20°/ 7°
0%
Fri Night
Cloudy
35°2°
0%
Sat Night
Cloudy
35°2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Mostly cloudy with a chance of rain with a slight chance of thunderstorms. Breezy and not as cool. Near steady temperature in the lower 70s. South winds 20 to 25 mph with gusts up to 35 mph. Chance of rain 50 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Lows in the mid 50s. South winds 10 to 15 mph. Gusts up to 30 mph in the evening. Chance of rain near 100 percent.

Litchfield, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
65°/ 42° 18°/ 6°
20%
Friday
Mostly Cloudy
58°/ 35° 14°/ 2°
0%
Sat Night
Cloudy
35°2°
0%
Sunday
Clear
62°17°
0%
Monday
Clear
62°17°
0%

Day: Rain with a slight chance of thunderstorms. Breezy and not as cool. Near steady temperature in the lower 70s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then rain likely after midnight. Cooler with lows in the lower 50s. South winds 10 to 15 mph. Gusts up to 30 mph in the evening. Chance of rain near 100 percent.

Greene County, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Sprinkles
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
62°/ 42° 17°/ 6°
20%
Fri-Fri Night
Mostly Cloudy
58°14°
0%
Sat-Sat Night
Cloudy
55°13°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Breezy with highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest around 10 mph with gusts up to 20 mph after midnight. Chance of rain near 100 percent.

Alton, MO

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
65°/ 45° 18°/ 7°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Partly Cloudy
55°/ 35° 13°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Breezy with highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph, becoming southwest 5 to 10 mph with gusts up to 20 mph after midnight. Chance of rain near 100 percent.

Monroe County, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
65°/ 42° 18°/ 6°
0%
Thursday
Sunny
68°/ 42° 20°/ 6°
0%
Fri Night-Sat
Mostly Cloudy
38°3°
0%
Sat Night
Cloudy
35°2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Much cooler with lows in the lower 50s. South winds 10 to 15 mph with gusts up to 25 mph, becoming southwest around 5 mph after midnight. Chance of rain near 100 percent.

Chester, IL

Afternoon
Thunderstorms
70°/ 52° 21°/ 11°
100%
Wednesday
Mostly Cloudy
65°/ 42° 18°/ 6°
0%
Thursday
Sunny
68°/ 42° 20°/ 6°
0%
Fri Night
Mostly Cloudy
38°3°
0%
Saturday
Partly Cloudy
58°/ 35° 14°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Near steady temperature around 70. Temperature falling into the upper 60s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of sprinkles after midnight. Cooler with lows in the lower 50s. South winds 10 to 15 mph. Chance of rain near 100 percent.

Jefferson County, MO

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
100%
Wednesday
Mostly Cloudy
65°/ 42° 18°/ 6°
0%
Thursday
Sunny
68°/ 42° 20°/ 6°
0%
Fri Night-Sat
Mostly Cloudy
38°3°
0%
Sat Night
Cloudy
35°2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Highs in the lower 70s. Temperature falling into the upper 60s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Much cooler with lows in the lower 50s. South winds 10 to 15 mph with gusts up to 25 mph, becoming southwest around 5 mph after midnight. Chance of rain near 100 percent.

Pinckneyville, IL

Afternoon
Thunderstorms
75°/ 55° 24°/ 13°
100%
Wednesday
Mostly Cloudy
68°/ 42° 20°/ 6°
0%
Thursday
Sunny
68°/ 42° 20°/ 6°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Partly Cloudy
58°/ 35° 14°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Breezy. Near steady temperature in the mid 70s. South winds 15 to 25 mph. Chance of rain 50 percent.

Night: Showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. South winds 10 to 15 mph. Chance of rain near 100 percent.

Mount Vernon, IL

Afternoon
Partly Cloudy
75°/ 55° 24°/ 13°
100%
Wednesday
Mostly Cloudy
68°/ 42° 20°/ 6°
0%
Thursday
Sunny
68°/ 45° 20°/ 7°
0%
Fri Night
Cloudy
35°2°
0%
Sat Night
Cloudy
35°2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Partly sunny and breezy. Near steady temperature in the mid 70s. South winds 20 to 25 mph.

Night: Showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. South winds 15 to 20 mph. Chance of rain near 100 percent.

Taylorville, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
90%
Wednesday
Sprinkles
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
62°/ 42° 17°/ 6°
0%
Fri Night
Mostly Cloudy
42°6°
0%
Saturday
Cloudy
58°14°
0%
Sun Night
Cloudy
58°14°
0%
Monday
Sunny
60°16°
0%

Day: Rain likely with a slight chance of thunderstorms. Breezy. Near steady temperature in the lower 70s. South winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 70 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then rain likely after midnight. Lows in the lower 50s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.

Shelbyville, IL

Afternoon
Thunderstorms
72°/ 55° 22°/ 13°
100%
Wednesday
Sprinkles
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
62°/ 42° 17°/ 6°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Cloudy
38°3°
0%
Sun Night
Cloudy
38°3°
0%
Monday
Sunny
60°16°
0%

Day: Mostly cloudy with a chance of rain with a slight chance of thunderstorms. Not as cool. Near steady temperature in the lower 70s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 50 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Washington, MO

Afternoon
Thunderstorms
68°/ 48° 20°/ 9°
100%
Wednesday
Mostly Cloudy
62°/ 38° 17°/ 3°
0%
Thursday
Sunny
65°/ 40° 18°/ 4°
20%
Friday
Mostly Cloudy
58°14°
0%
Saturday
Mostly Cloudy
58°/ 32° 14°/ 0°
0%
Sun-Sun Night
Clear
62°17°
0%
Monday
Sunny
68°20°
0%

Day: Rain with a slight chance of thunderstorms. Near steady temperature in the upper 60s. Temperature falling into the mid 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain near 100 percent.

Night: Cloudy. Rain likely with a slight chance of thunderstorms in the evening, then a chance of sprinkles after midnight. Much cooler with lows in the upper 40s. Southwest winds 5 to 10 mph. Gusts up to 25 mph in the evening. Chance of rain 70 percent.

Carbondale, IL

Afternoon
Thunderstorms
75°/ 55° 24°/ 13°
100%
Wednesday
Partly Cloudy
68°/ 42° 20°/ 6°
0%
Thursday
Sunny
68°/ 42° 20°/ 6°
0%
Fri Night
Mostly Cloudy
38°3°
0%
Saturday
Partly Cloudy
58°/ 35° 14°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Partly sunny with a chance of showers with a slight chance of thunderstorms. Near steady temperature in the mid 70s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 50 percent.

Night: Showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. South winds 10 to 15 mph. Chance of rain near 100 percent.

Springfield, IL

Afternoon
Thunderstorms
72°/ 52° 22°/ 11°
90%
Wednesday
Sprinkles
60°/ 42° 16°/ 6°
0%
Thursday
Sunny
62°/ 42° 17°/ 6°
0%
Friday
Mostly Cloudy
42°6°
0%
Saturday
Mostly Cloudy
42°/ 38° 6°/ 3°
0%
Sun Night
Cloudy
38°3°
0%
Monday
Sunny
60°16°
0%

Day: Rain with a slight chance of thunderstorms. Breezy. Near steady temperature in the lower 70s. South winds 20 to 25 mph with gusts up to 35 mph. Chance of rain 90 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of rain after midnight. Cooler with lows in the lower 50s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 80 percent.

West Frankfort, IL

Afternoon
Partly Cloudy
78°/ 55° 26°/ 13°
100%
Wednesday
Mostly Cloudy
68°/ 45° 20°/ 7°
0%
Thursday
Sunny
68°/ 45° 20°/ 7°
0%
Fri Night
Mostly Cloudy
38°3°
0%
Saturday
Partly Cloudy
58°/ 35° 14°/ 2°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Partly sunny and breezy. Near steady temperature in the upper 70s. South winds 20 to 25 mph.

Night: Showers with a slight chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. South winds 15 to 20 mph, diminishing to 5 to 10 mph after midnight. Chance of rain near 100 percent.

Effingham, IL

Afternoon
Thunderstorms
75°/ 55° 24°/ 13°
90%
Wednesday
Sprinkles
62°/ 42° 17°/ 6°
0%
Thursday
Sunny
65°/ 42° 18°/ 6°
0%
Fri Night
Cloudy
38°3°
0%
Saturday
Cloudy
38°3°
0%
Sun Night
Cloudy
38°3°
0%
Monday
Sunny
60°16°
0%

Day: Mostly cloudy with a chance of rain with a slight chance of thunderstorms. Not as cool. Near steady temperature in the mid 70s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 40 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then rain after midnight. Lows in the mid 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.

Flora, IL

Afternoon
Rain
75°/ 58° 24°/ 14°
90%
Wednesday
Sprinkles
65°/ 42° 18°/ 6°
0%
Thursday
Sunny
65°/ 45° 18°/ 7°
0%
Fri Night-Sat
Cloudy
42°6°
0%
Sat Night
Cloudy
38°3°
0%
Sun Night
Cloudy
38°3°
0%
Monday
Sunny
62°17°
0%

Day: Partly sunny with a 20 percent chance of rain. Not as cool. Near steady temperature in the mid 70s. South winds 15 to 20 mph with gusts up to 35 mph.

Night: Rain with a slight chance of thunderstorms in the evening, then rain after midnight. Lows in the upper 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 90 percent.

Farmington, MO

Afternoon
Thunderstorms
65°/ 48° 18°/ 9°
100%
Wednesday
Mostly Cloudy
65°/ 38° 18°/ 3°
0%
Thursday
Sunny
68°/ 40° 20°/ 4°
0%
Fri Night
Cloudy
35°2°
0%
Saturday
Partly Cloudy
58°/ 32° 14°/ 0°
0%
Sunday
Clear
65°18°
0%
Monday
Clear
65°18°
0%

Day: Rain with a slight chance of thunderstorms. Near steady temperature in the mid 60s. Temperature falling into the mid 60s. South winds 10 to 15 mph with gusts up to 35 mph. Chance of rain near 100 percent.

Night: Rain with a slight chance of thunderstorms in the evening, then a chance of sprinkles after midnight. Much cooler with lows in the upper 40s. South winds 10 to 15 mph with gusts up to 25 mph, becoming southwest around 5 mph after midnight. Chance of rain near 100 percent.

Names listed above may include county names.

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