Lake Arrowhead, IL Weather Forecast & Current Conditions

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Lake Arrowhead, IL Weather Maps

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Lake Arrowhead Weather Map
UTC Time: 9/16/2026, 12:43
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Lake Arrowhead, IL

Today
Thunderstorms
75°/ 68° 24°/ 20°
70%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Mostly Cloudy
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
60%
Monday
Rain Showers
75°/ 60° 24°/ 16°
50%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and early morning. Showers likely with a chance of thunderstorms late. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Chicago, IL

Today
Rain Showers
72°/ 68° 22°/ 20°
50%
Thursday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Sunday
Rain Showers
72°/ 62° 22°/ 17°
60%
Monday
Rain Showers
72°/ 62° 22°/ 17°
50%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A chance of showers early in the morning, then a slight chance of showers late in the morning. A chance of showers in the afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the upper 60s. Northeast winds 5 to 10 mph, becoming southeast after midnight. Chance of precipitation 50 percent.

Joliet, IL

Today
Thunderstorms
75°/ 65° 24°/ 18°
70%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Rain Showers
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
60%
Monday
Rain Showers
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Naperville, IL

Today
Rain Showers
72°/ 65° 22°/ 18°
50%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
50%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
80°/ 65° 27°/ 18°
80%
Sunday
Rain Showers
72°/ 62° 22°/ 17°
60%
Monday
Rain Showers
72°/ 58° 22°/ 14°
50%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A chance of showers early in the morning, then a slight chance of showers late in the morning. A chance of showers in the afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the mid 60s. East winds around 5 mph. Chance of precipitation 50 percent.

Crete, IL

Today
Thunderstorms
78°/ 65° 26°/ 18°
70%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Friday
Mostly Cloudy
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Sunday
Rain Showers
75°/ 60° 24°/ 16°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Gary, IN

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Friday
Mostly Cloudy
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Sunday
Rain Showers
75°/ 60° 24°/ 16°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
50%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. East winds around 5 mph. Chance of precipitation 70 percent.

Channahon, IL

Today
Thunderstorms
78°/ 68° 26°/ 20°
80%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Friday
Mostly Cloudy
80°/ 65° 27°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
75°/ 60° 24°/ 16°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 80 percent.

Evanston, IL

Today
Rain Showers
72°/ 65° 22°/ 18°
50%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
40%
Friday
Rain Showers
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
90%
Sunday
Rain Showers
72°/ 60° 22°/ 16°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A chance of showers early in the morning, then a slight chance of showers late in the morning. A chance of showers in the afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 40 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the mid 60s. Northeast winds around 5 mph. Chance of precipitation 50 percent.

Aurora, IL

Today
Rain Showers
72°/ 65° 22°/ 18°
50%
Thursday
Rain Showers
75°/ 62° 24°/ 17°
40%
Friday
Rain Showers
78°/ 62° 26°/ 17°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
80%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A slight chance of showers early in the morning, then a chance of showers in the late morning and afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 50 percent.

Kankakee, IL

Today
Thunderstorms
78°/ 65° 26°/ 18°
80%
Thursday
Thunderstorms
80°/ 62° 27°/ 17°
70%
Friday
Cloudy
80°/ 65° 27°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
80%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 80 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 80 percent.

Morris, IL

Today
Thunderstorms
78°/ 68° 26°/ 20°
80%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
50%
Monday
Rain Showers
78°/ 60° 26°/ 16°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 80 percent.

Oswego, IL

Today
Rain Showers
75°/ 65° 24°/ 18°
70%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Rain Showers
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 62° 24°/ 17°
50%
Monday
Rain Showers
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. Highs in the mid 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms late in the evening. Showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Portage, IN

Today
Thunderstorms
78°/ 68° 26°/ 20°
70%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
70%
Friday
Mostly Cloudy
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
80%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Monday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the upper 70s. Northeast winds around 5 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph, becoming southeast after midnight. Chance of precipitation 70 percent.

Waukegan, IL

Today
Rain Showers
72°/ 62° 22°/ 17°
40%
Thursday
Rain Showers
75°/ 60° 24°/ 16°
40%
Friday
Rain Showers
75°/ 62° 24°/ 17°
80%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A slight chance of showers. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 40 percent.

Roselawn, IN

Today
Thunderstorms
82°/ 68° 28°/ 20°
80%
Thursday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Friday
Cloudy
80°/ 62° 27°/ 17°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
80%
Sunday
Rain Showers
78°/ 60° 26°/ 16°
50%
Monday
Rain Showers
78°/ 58° 26°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of precipitation 80 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

DeKalb, IL

Today
Rain Showers
72°/ 65° 22°/ 18°
70%
Thursday
Rain Showers
78°/ 62° 26°/ 17°
50%
Friday
Rain Showers
78°/ 62° 26°/ 17°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
75°24°
40%

Day: Mostly cloudy. A slight chance of showers early in the morning, then a chance of showers in the late morning and afternoon. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms late in the evening. Showers likely with a chance of thunderstorms after midnight. Lows in the mid 60s. East winds around 5 mph. Chance of precipitation 70 percent.

Crystal Lake, IL

Today
Rain Showers
72°/ 62° 22°/ 17°
50%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
40%
Friday
Rain Showers
75°/ 62° 24°/ 17°
90%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
90%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
72°/ 58° 22°/ 14°
40%
Tuesday
Rain Showers
72°22°
40%

Day: Mostly cloudy. A slight chance of showers. Highs in the lower 70s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers early in the evening, then a chance of showers with a slight chance of thunderstorms in the late evening and overnight. Lows in the lower 60s. East winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 50 percent.

Watseka, IL

Today
Thunderstorms
82°/ 68° 28°/ 20°
80%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Cloudy
82°/ 65° 28°/ 18°
40%
Saturday
Thunderstorms
88°/ 65° 31°/ 18°
70%
Sunday
Thunderstorms
80°/ 62° 27°/ 17°
50%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
40%
Tuesday
Rain Showers
78°26°
30%

Day: Mostly cloudy. Showers and a slight chance of thunderstorms early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. East winds around 5 mph. Chance of precipitation 80 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Rensselaer, IN

Today
Thunderstorms
82°/ 68° 28°/ 20°
80%
Thursday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Friday
Mostly Cloudy
78°/ 62° 26°/ 17°
40%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
80%
Sunday
Rain Showers
78°/ 60° 26°/ 16°
50%
Monday
Thunderstorms
78°/ 58° 26°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Northeast winds around 5 mph. Chance of precipitation 80 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers likely with a chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Ottawa, IL

Today
Thunderstorms
75°/ 68° 24°/ 20°
80%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
70%
Friday
Rain Showers
80°/ 68° 27°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
78°/ 62° 26°/ 17°
60%
Monday
Rain Showers
75°/ 58° 24°/ 14°
40%
Tuesday
Rain Showers
75°24°
30%

Day: Mostly cloudy. Showers likely early in the morning, then a chance of showers in the late morning and afternoon. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s. Northeast winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then showers with a chance of thunderstorms after midnight. Locally heavy rainfall possible after midnight. Humid with lows in the upper 60s. East winds around 5 mph in the evening, becoming light and variable. Chance of precipitation 80 percent.

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