Weather Alert
Little Sister Lake Weather Warning NWS WEATHER ALERT FOR THE LITTLE SISTER LAKE, IL AREA - FLOOD WARNING Issued: 832 PM CDT Wed Aug 26 2026 Little Sister Lake Weather Warning

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Little Sister Lake, IL Weather - Hour by Hour Forecast

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Little Sister Lake, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 78°F26°C, dew point 64°F18°C, humidity 61%. Wind direction is WNW at 6 mph10 km/h with visibility of 10 mi16 km. Barometric pressure is 29.93 in1014 mb.
Tonight - Mostly clear. Lows in the lower 60s. Northwest winds around 5 mph... Full Forecast
Thursday - Sunny. Highs in the lower 80s. Northwest winds around 5 mph... Full Forecast

Little Sister Lake Hourly Weather

24 Hour Forecast Scroll
Wed, Aug 26
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Little Sister Lake, IL Hourly Weather - Clear - 8:00 PM Little Sister Lake, IL Hourly Weather - Clear - 9:00 PM Little Sister Lake, IL Hourly Weather - Clear - 10:00 PM Little Sister Lake, IL Hourly Weather - Clear - 11:00 PM Little Sister Lake, IL Hourly Weather - Clear - 12:00 AM Little Sister Lake, IL Hourly Weather - Clear - 1:00 AM Little Sister Lake, IL Hourly Weather - Clear - 2:00 AM Little Sister Lake, IL Hourly Weather - Clear - 3:00 AM Little Sister Lake, IL Hourly Weather - Clear - 4:00 AM Little Sister Lake, IL Hourly Weather - Clear - 5:00 AM Little Sister Lake, IL Hourly Weather - Clear - 6:00 AM Little Sister Lake, IL Hourly Weather - Clear - 7:00 AM Little Sister Lake, IL Hourly Weather - Clear - 8:00 AM Little Sister Lake, IL Hourly Weather - Clear - 9:00 AM Little Sister Lake, IL Hourly Weather - Clear - 10:00 AM Little Sister Lake, IL Hourly Weather - Clear - 11:00 AM Little Sister Lake, IL Hourly Weather - Clear - 12:00 PM Little Sister Lake, IL Hourly Weather - Clear - 1:00 PM Little Sister Lake, IL Hourly Weather - Clear - 2:00 PM Little Sister Lake, IL Hourly Weather - Clear - 3:00 PM Little Sister Lake, IL Hourly Weather - Clear - 4:00 PM Little Sister Lake, IL Hourly Weather - Clear - 5:00 PM Little Sister Lake, IL Hourly Weather - Clear - 6:00 PM Little Sister Lake, IL Hourly Weather - Clear - 7:00 PM
Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear Clear
77°F25°C 74°F23°C 71°F22°C 70°F21°C 68°F20°C 67°F19°C 66°F19°C 65°F18°C 64°F18°C 64°F18°C 64°F18°C 64°F18°C 68°F20°C 72°F22°C 76°F24°C 78°F26°C 81°F27°C 83°F28°C 84°F29°C 84°F29°C 85°F29°C 84°F29°C 82°F28°C 81°F27°C
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2% 2% 2% 2% 2% 2% 5% 5% 5% 5% 5% 5% 3% 3% 3% 3% 3% 3% 0% 0% 0% 0% 0% 0%
61°F16°C 60°F16°C 60°F16°C 60°F16°C 59°F15°C 59°F15°C 59°F15°C 58°F14°C 58°F14°C 58°F14°C 58°F14°C 58°F14°C 59°F15°C 61°F16°C 62°F17°C 62°F17°C 61°F16°C 61°F16°C 61°F16°C 60°F16°C 60°F16°C 60°F16°C 60°F16°C 60°F16°C
58% 62% 68% 71% 73% 76% 78% 78% 81% 81% 81% 81% 73% 68% 62% 58% 51% 48% 46% 44% 43% 44% 47% 49%
SW SE NNE N N N N N N E S SSW SSW SSW SW SW SW SSE S S S S SSE SSE
3 mph 1 mph 1 mph 1 mph 0 mph 0 mph 0 mph 0 mph 0 mph 0 mph 1 mph 1 mph 1 mph 2 mph 2 mph 2 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph
10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 3 mi5 km .5 mi1 km .25 mi0 km .25 mi0 km .25 mi0 km .25 mi0 km .75 mi1 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 10 mi16 km
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
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Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KPIA model statistics.

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Prob Precip % = Probability of Precipitation.

Little Sister Lake 36 Hour Forecast

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

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