Weather Alert
Simpson Lake Weather Warning NWS WEATHER ALERT FOR THE SIMPSON LAKE, IL AREA - Issued: 1019 AM CDT Sat Sep 19 2026 Simpson Lake Weather Warning

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Simpson Lake, IL Weather - Hour by Hour Forecast

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Simpson Lake, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 83°F28°C, dew point 66°F19°C, humidity 57%. Wind direction is N at 0 mph0 km/h with visibility of 10 mi16 km. Barometric pressure is 29.9 in1013 mb.
Today - Sunny, hot. Near steady temperature in the upper 90s. Southwest winds 5 to 10 mph... Full Forecast
Tonight - Mostly clear. Lows in the lower 70s. Southwest winds around 5 mph... Full Forecast

Simpson Lake Hourly Weather

24 Hour Forecast Scroll
Sat, Sep 19
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Simpson Lake, IL Hourly Weather - Mostly Cloudy - 7:00 PM Simpson Lake, IL Hourly Weather - Mostly Cloudy - 8:00 PM Simpson Lake, IL Hourly Weather - Mostly Cloudy - 9:00 PM Simpson Lake, IL Hourly Weather - Mostly Cloudy - 10:00 PM Simpson Lake, IL Hourly Weather - Mostly Cloudy - 11:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 12:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 1:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 2:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 3:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 4:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 5:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 6:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 7:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 8:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 9:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 10:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 11:00 AM Simpson Lake, IL Hourly Weather - Cloudy - 12:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 1:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 2:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 3:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 4:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 5:00 PM Simpson Lake, IL Hourly Weather - Cloudy - 6:00 PM
Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
90°F32°C 84°F29°C 78°F26°C 72°F22°C 70°F21°C 69°F21°C 67°F19°C 67°F19°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 68°F20°C 69°F21°C 71°F22°C 72°F22°C 74°F23°C 75°F24°C 77°F25°C 77°F25°C 76°F24°C 76°F24°C 74°F23°C 72°F22°C
- - - - - - - Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain
2% 10% 10% 10% 10% 10% 10% 25% 25% 25% 25% 25% 25% 39% 39% 39% 39% 39% 39% 35% 35% 35% 35% 35%
58°F14°C 60°F16°C 61°F16°C 63°F17°C 62°F17°C 62°F17°C 61°F16°C 62°F17°C 62°F17°C 63°F17°C 63°F17°C 63°F17°C 63°F17°C 64°F18°C 66°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 67°F19°C 68°F20°C
34% 44% 56% 73% 76% 78% 81% 84% 81% 84% 84% 84% 84% 84% 84% 84% 79% 76% 71% 71% 74% 74% 79% 87%
WNW SSE E N N NNE NNE NNE N N N N N SE SSW N SSW SE NE SE SSW N SSW SE
3 mph 3 mph 6 mph 6 mph 6 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 3 mph 3 mph 3 mph 6 mph 6 mph 6 mph 5 mph 5 mph 5 mph 6 mph 6 mph 6 mph 6 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 5 mi8 km 5 mi8 km 5 mi8 km 3 mi5 km .75 mi1 km .5 mi1 km 3 mi5 km 5 mi8 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
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KHSB model statistics.

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Prob Precip % = Probability of Precipitation.

Simpson Lake 36 Hour Forecast

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

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