Jack Lake, IL Weather Forecast & Current Conditions

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Jack Lake Weather Map
UTC Time: 9/15/2026, 09:31
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Jack Lake, IL Regional Weather

Expires:202609151000;;483453
ASUS43 KLOT 150910
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 AM CDT TUE SEP 15 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.


ILZ028>032-037-038-041>044-048-051>054-059>061-151000-
CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PONTIAC        PTCLDY    68  57  68 S13       29.99F TC  20           
BLOOMINGTON    PTCLDY    66  58  75 S15       30.02F TC  19           
DECATUR        PTCLDY    69  57  65 S12       30.03F TC  21           
PEORIA         MOCLDY    69  57  65 S12       29.96F TC  21           
LACON*         PTCLDY    71  55  58 S9        29.95S TC  22           
LINCOLN*       PTCLDY    70  58  66 S8        30.00F TC  21           
SPRINGFIELD    CLEAR     71  59  65 S12       29.99F TC  22           
TAYLORVILLE    NOT AVBL                                               
$$


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

Jack Lake, IL

Today
Thunderstorms
92°/ 65° 33°/ 18°
70%
Wednesday
Thunderstorms
85°/ 70° 29°/ 21°
50%
Thursday
Rain Showers
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
88°/ 68° 31°/ 20°
40%
Sat Night
Rain Showers
65°18°
60%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%

Day: Mostly sunny. A slight chance of showers and thunderstorms this morning, then a chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 5 to 10 mph with gusts up to 25 mph, becoming west this afternoon. Chance of rain 50 percent. Heat index values up to 101.

Night: A chance of thunderstorms. Showers likely. Lows in the mid 60s. North winds around 5 mph. Chance of rain 70 percent.

Rushville, IL

Today
Thunderstorms
90°/ 65° 32°/ 18°
70%
Wednesday
Thunderstorms
85°/ 70° 29°/ 21°
50%
Thursday
Rain Showers
88°/ 68° 31°/ 20°
40%
Friday
Rain Showers
88°/ 68° 31°/ 20°
30%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
50%
Sunday
Rain Showers
75°24°
50%

Day: Mostly sunny. A slight chance of showers this morning, then a chance of showers and thunderstorms this afternoon. Highs around 90. Southwest winds 5 to 10 mph with gusts up to 25 mph, becoming west this afternoon. Chance of rain 40 percent. Heat index values up to 101.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

Canton, IL

Today
Thunderstorms
88°/ 65° 31°/ 18°
70%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Thursday
Rain Showers
88°/ 68° 31°/ 20°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Mostly sunny with a chance of showers. A slight chance of thunderstorms this morning, then a chance of thunderstorms this afternoon. Highs in the upper 80s. Southwest winds 5 to 10 mph with gusts up to 25 mph, becoming west this afternoon. Chance of rain 50 percent. Heat index values up to 100.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. North winds around 5 mph. Chance of rain 70 percent.

Beardstown, IL

Today
Thunderstorms
92°/ 68° 33°/ 20°
50%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Thursday
Sunny
92°/ 68° 33°/ 20°
30%
Friday
Cloudy
88°31°
0%
Saturday
Cloudy
88°/ 65° 31°/ 18°
50%

Day: Mostly sunny. A chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 10 to 15 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 40 percent. Heat index values up to 101.

Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. North winds around 5 mph. Chance of rain 50 percent.

Petersburg, IL

Today
Thunderstorms
92°/ 68° 33°/ 20°
50%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Thursday
Sunny
92°/ 68° 33°/ 20°
30%
Friday
Cloudy
88°31°
0%
Saturday
Cloudy
88°/ 65° 31°/ 18°
50%
Sun Night
Mostly Cloudy
58°14°
0%

Day: Mostly sunny. A chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 10 to 15 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 40 percent. Heat index values up to 101.

Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Jacksonville, IL

Today
Thunderstorms
92°/ 68° 33°/ 20°
50%
Wednesday
Thunderstorms
90°/ 72° 32°/ 22°
40%
Thursday
Sunny
92°/ 68° 33°/ 20°
0%
Friday
Cloudy
68°20°
0%
Saturday
Cloudy
68°/ 65° 20°/ 18°
50%
Sun Night
Mostly Cloudy
58°14°
0%

Day: Sunny. A chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 10 to 15 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 50 percent. Heat index values up to 102.

Night: Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Macomb, IL

Today
Thunderstorms
88°/ 65° 31°/ 18°
70%
Wednesday
Rain Showers
82°/ 68° 28°/ 20°
70%
Thursday
Rain Showers
85°/ 68° 29°/ 20°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sunday
Rain Showers
75°24°
50%

Day: Partly cloudy. A chance of showers with a slight chance of thunderstorms this morning. A chance of showers and thunderstorms this afternoon. Humid with highs in the upper 80s. South winds 10 to 15 mph with gusts up to 25 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 50 percent.

Night: A chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Humid with lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

Springfield, IL

Today
Thunderstorms
95°/ 68° 35°/ 20°
50%
Wednesday
Thunderstorms
92°/ 72° 33°/ 22°
40%
Thursday
Sunny
92°/ 70° 33°/ 21°
0%
Friday
Cloudy
70°21°
0%
Saturday
Cloudy
70°/ 68° 21°/ 20°
50%
Sun Night
Mostly Cloudy
60°16°
0%

Day: Mostly sunny. A chance of showers and thunderstorms this afternoon. Highs in the mid 90s. South winds 10 to 15 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 50 percent. Heat index values up to 103.

Night: Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Pekin, IL

Today
Thunderstorms
90°/ 65° 32°/ 18°
70%
Wednesday
Thunderstorms
85°/ 70° 29°/ 21°
50%
Thursday
Rain Showers
88°/ 68° 31°/ 20°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Sat Night
Rain Showers
65°18°
60%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
40%

Day: Mostly sunny with a chance of showers. A slight chance of thunderstorms this morning, then a chance of thunderstorms this afternoon. Warmer with highs around 90. South winds 10 to 15 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 50 percent. Heat index values up to 100.

Night: A chance of thunderstorms. Showers likely. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Lincoln, IL

Today
Thunderstorms
92°/ 68° 33°/ 20°
50%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Thursday
Sunny
90°/ 68° 32°/ 20°
0%
Friday
Rain Showers
88°/ 68° 31°/ 20°
30%
Sat Night
Rain Showers
65°18°
60%
Sunday
Rain Showers
78°/ 58° 26°/ 14°
50%

Day: Mostly sunny. A slight chance of showers this morning, then a chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 10 to 15 mph, becoming west this afternoon. Chance of rain 50 percent. Heat index values up to 100.

Night: Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 50 percent.

Peoria, IL

Today
Thunderstorms
88°/ 65° 31°/ 18°
70%
Wednesday
Thunderstorms
82°/ 68° 28°/ 20°
70%
Thursday
Rain Showers
85°/ 65° 29°/ 18°
50%
Friday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
40%

Day: Mostly sunny with a chance of showers. A slight chance of thunderstorms this morning, then a chance of thunderstorms this afternoon. Warmer with highs in the upper 80s. South winds 10 to 15 mph with gusts up to 25 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 50 percent.

Night: A chance of thunderstorms. Showers likely. Lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

Winchester, IL

Today
Thunderstorms
92°/ 68° 33°/ 20°
50%
Wednesday
Thunderstorms
90°/ 72° 32°/ 22°
40%
Thursday
Sunny
92°/ 68° 33°/ 20°
0%
Fri Night
Cloudy
70°21°
0%
Saturday
Sunny
90°/ 65° 32°/ 18°
50%

Day: Mostly sunny. A chance of showers and thunderstorms this afternoon. Highs in the lower 90s. South winds 10 to 15 mph with gusts up to 25 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 40 percent. Heat index values up to 103.

Night: Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. North winds around 5 mph. Chance of rain 50 percent.

Galesburg, IL

Today
Thunderstorms
85°/ 62° 29°/ 17°
70%
Wednesday
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Rain Showers
85°/ 65° 29°/ 18°
50%
Friday
Thunderstorms
82°/ 68° 28°/ 20°
50%
Saturday
Rain Showers
82°/ 62° 28°/ 17°
50%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Partly sunny with a chance of thunderstorms. Showers likely, mainly this morning. Highs in the mid 80s. South winds 10 to 15 mph with gusts up to 25 mph, becoming west 5 to 10 mph this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the lower 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

Carthage, IL

Today
Thunderstorms
88°/ 65° 31°/ 18°
70%
Wednesday
Rain Showers
82°/ 70° 28°/ 21°
70%
Thursday
Rain Showers
88°/ 68° 31°/ 20°
50%
Friday
Rain Showers
85°/ 70° 29°/ 21°
40%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sunday
Rain Showers
75°24°
50%

Day: Partly cloudy, then becoming partly sunny this morning, then becoming mostly sunny. A chance of showers with a slight chance of thunderstorms this morning. A chance of showers and thunderstorms this afternoon. Humid with highs in the upper 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph, becoming northwest 5 to 10 mph this afternoon. Chance of rain 50 percent.

Night: Showers likely with a chance of thunderstorms. Humid with lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

Monmouth, IL

Today
Rain Showers
85°/ 62° 29°/ 17°
80%
Wednesday
Rain Showers
80°/ 68° 27°/ 20°
70%
Thursday
Rain Showers
85°/ 65° 29°/ 18°
50%
Fri Night
Rain Showers
68°20°
30%
Saturday
Rain Showers
82°/ 62° 28°/ 17°
60%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy with a chance of showers. Humid with highs in the mid 80s. South winds 10 to 15 mph with gusts up to 25 mph, becoming northwest 5 to 10 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers after midnight. Humid with lows in the lower 60s. North winds 5 to 10 mph. Chance of rain 80 percent.

Quincy, IL

Tonight
Cloudy
75°24°
0%
Tuesday
Thunderstorms
92°/ 65° 33°/ 18°
70%
Wednesday
Thunderstorms
88°/ 72° 31°/ 22°
50%
Thursday
Thunderstorms
90°/ 70° 32°/ 21°
20%
Fri Night
Clear
72°22°
0%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
30%
Sun-Sun Night
Thunderstorms
82°28°
40%

Night: Partly cloudy and not as cool. Near steady temperature in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph.

White Hall, IL

Tonight
Clear
72°22°
0%
Tuesday
Thunderstorms
98°/ 68° 37°/ 20°
50%
Wednesday
Thunderstorms
92°/ 72° 33°/ 22°
40%
Thu-Thu Night
Clear
95°35°
0%
Friday
Sunny
92°/ 72° 33°/ 22°
0%
Sat Night
Rain Showers
68°20°
20%
Sunday
Thunderstorms
88°31°
20%

Night: Mostly clear and not as cool. Near steady temperature in the lower 70s. South winds around 10 mph with gusts up to 20 mph.

Oquawka, IL

Today
Thunderstorms
85°/ 62° 29°/ 17°
80%
Wednesday
Rain Showers
80°/ 68° 27°/ 20°
80%
Thursday
Rain Showers
85°/ 68° 29°/ 20°
50%
Fri Night
Rain Showers
68°20°
30%
Saturday
Rain Showers
82°/ 65° 28°/ 18°
60%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%

Day: Mostly cloudy with a chance of showers and thunderstorms. Humid with highs in the mid 80s. South winds 10 to 15 mph with gusts up to 25 mph, becoming northwest 5 to 10 mph this afternoon. Chance of rain 50 percent.

Night: A chance of thunderstorms. Showers with lows in the lower 60s. North winds 5 to 10 mph. Chance of rain 80 percent.

Taylorville, IL

Today
Thunderstorms
95°/ 68° 35°/ 20°
50%
Wednesday
Thunderstorms
92°/ 72° 33°/ 22°
40%
Thursday
Sunny
95°/ 68° 35°/ 20°
0%
Friday
Cloudy
68°20°
0%
Saturday
Cloudy
68°/ 68° 20°/ 20°
50%

Day: Sunny. A chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. South winds 10 to 15 mph, becoming southwest 5 to 10 mph this afternoon. Chance of rain 50 percent. Heat index values up to 104.

Night: Mostly cloudy with a chance of showers and thunderstorms. Humid with lows in the upper 60s. South winds around 5 mph, becoming northeast after midnight. Chance of rain 50 percent.

Bloomington, IL

Today
Thunderstorms
92°/ 65° 33°/ 18°
70%
Wednesday
Thunderstorms
85°/ 68° 29°/ 20°
50%
Thursday
Rain Showers
88°/ 65° 31°/ 18°
50%
Friday
Rain Showers
85°/ 68° 29°/ 20°
30%
Sat Night
Rain Showers
65°18°
60%
Sun-Sun Night
Rain Showers
78°26°
40%

Day: Mostly sunny. A slight chance of showers and thunderstorms this morning, then a chance of showers and thunderstorms this afternoon. Warmer with highs in the lower 90s. South winds around 15 mph, becoming west this afternoon. Chance of rain 50 percent. Heat index values up to 101 this afternoon.

Night: Showers likely. A chance of thunderstorms, mainly in the evening. Humid with lows in the mid 60s. North winds 5 to 10 mph. Chance of rain 70 percent.

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