Weather Alert
Arrowhead Lake Weather Warning NWS WEATHER ALERT FOR THE ARROWHEAD LAKE, IL AREA - Issued: 242 PM CDT Wed Sep 16 2026 Arrowhead Lake Weather Warning

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Arrowhead Lake, IL Weather - Hour by Hour Forecast

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Arrowhead Lake, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 71°F22°C, dew point 70°F21°C, humidity 96%. Wind direction is N at 0 mph0 km/h with visibility of 10 mi16 km. Barometric pressure is 30.21 in1023 mb.
Rest of Tonight - Mostly cloudy. Near steady temperature in the lower 70s. Southeast winds around 5 mph... Full Forecast
Thursday - Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. West winds 5 to 10 m.. Full Forecast

Arrowhead Lake Hourly Weather

24 Hour Forecast Scroll
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Midnight
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Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 2:00 AM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 3:00 AM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 4:00 AM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 5:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 6:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 7:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 8:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 9:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 10:00 AM Arrowhead Lake, IL Hourly Weather - Mostly Cloudy - 11:00 AM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 12:00 PM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 1:00 PM Arrowhead Lake, IL Hourly Weather - Partly Cloudy - 2:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 3:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 4:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 5:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 6:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 7:00 PM Arrowhead Lake, IL Hourly Weather - Mostly Clear - 8:00 PM Arrowhead Lake, IL Hourly Weather - Cloudy - 9:00 PM Arrowhead Lake, IL Hourly Weather - Cloudy - 10:00 PM Arrowhead Lake, IL Hourly Weather - Cloudy - 11:00 PM Arrowhead Lake, IL Hourly Weather - Cloudy - 12:00 AM Arrowhead Lake, IL Hourly Weather - Cloudy - 1:00 AM
Mostly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Cloudy Cloudy Cloudy Cloudy Cloudy
73°F23°C 73°F23°C 72°F22°C 72°F22°C 71°F22°C 71°F22°C 75°F24°C 78°F26°C 82°F28°C 85°F29°C 87°F31°C 90°F32°C 91°F33°C 91°F33°C 92°F33°C 90°F32°C 87°F31°C 85°F29°C 82°F28°C 80°F27°C 77°F25°C 75°F24°C 73°F23°C 71°F22°C
Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain - - - - - - Rain Rain Rain Rain Rain Rain
34% 34% 34% 34% 34% 34% 34% 34% 34% 34% 34% 34% 0% 0% 0% 0% 0% 0% 34% 34% 34% 34% 34% 34%
71°F22°C 70°F21°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 70°F21°C 72°F22°C 73°F23°C 72°F22°C 72°F22°C 71°F22°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C
93% 90% 93% 93% 93% 93% 84% 82% 74% 65% 61% 54% 50% 50% 47% 50% 57% 61% 67% 72% 79% 84% 87% 93%
S S S SSE SW SW SSW SSW W SSW SSW SSW SSW SSW SSW W NW NW SW SE NNE NNE NNE NNE
3 mph 3 mph 3 mph 3 mph 5 mph 5 mph 5 mph 6 mph 6 mph 6 mph 6 mph 6 mph 6 mph 7 mph 7 mph 7 mph 5 mph 5 mph 5 mph 6 mph 6 mph 6 mph 6 mph 6 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KDEC model statistics.

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Prob Precip % = Probability of Precipitation.

Arrowhead Lake 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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