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Simpson Weather Warning NWS WEATHER ALERT FOR THE SIMPSON, IL AREA - Issued: 317 PM CDT Thu Sep 3 2026 Simpson Weather Warning

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Simpson, IL Weather - Hour by Hour Forecast

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Simpson, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 80°F27°C, dew point 71°F22°C, humidity 74%. Wind direction is SSE at 1 mph2 km/h with visibility of 10 mi16 km. Barometric pressure is 29.98 in1015 mb.
Tonight - Clear. Lows in the mid 70s. South winds around 5 mph this evening, becoming light and variable... Full Forecast
Friday - Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Highest heat index readings heat index readings up to 106 in.. Full Forecast

Simpson Hourly Weather

24 Hour Forecast Scroll
Thu, Sep 03
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Midnight
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Noon
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Simpson, IL Hourly Weather - Clear - 10:00 PM Simpson, IL Hourly Weather - Clear - 11:00 PM Simpson, IL Hourly Weather - Mostly Clear - 12:00 AM Simpson, IL Hourly Weather - Mostly Clear - 1:00 AM Simpson, IL Hourly Weather - Mostly Clear - 2:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 3:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 4:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 5:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 6:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 7:00 AM Simpson, IL Hourly Weather - Partly Cloudy - 8:00 AM Simpson, IL Hourly Weather - Clear - 9:00 AM Simpson, IL Hourly Weather - Clear - 10:00 AM Simpson, IL Hourly Weather - Clear - 11:00 AM Simpson, IL Hourly Weather - Clear - 12:00 PM Simpson, IL Hourly Weather - Clear - 1:00 PM Simpson, IL Hourly Weather - Clear - 2:00 PM Simpson, IL Hourly Weather - Mostly Clear - 3:00 PM Simpson, IL Hourly Weather - Mostly Clear - 4:00 PM Simpson, IL Hourly Weather - Mostly Clear - 5:00 PM Simpson, IL Hourly Weather - Partly Cloudy - 6:00 PM Simpson, IL Hourly Weather - Partly Cloudy - 7:00 PM Simpson, IL Hourly Weather - Partly Cloudy - 8:00 PM Simpson, IL Hourly Weather - Mostly Clear - 9:00 PM
Clear Clear Mostly Clear Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Clear Clear Clear Clear Clear Clear Mostly Clear Mostly Clear Mostly Clear Partly Cloudy Partly Cloudy Partly Cloudy Mostly Clear
80°F27°C 79°F26°C 77°F25°C 76°F24°C 75°F24°C 74°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 78°F26°C 83°F28°C 88°F31°C 90°F32°C 92°F33°C 94°F34°C 95°F35°C 95°F35°C 96°F36°C 93°F34°C 90°F32°C 87°F31°C 84°F29°C 80°F27°C
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7% 7% 7% 7% 4% 4% 4% 4% 4% 4% 1% 1% 1% 1% 1% 1% 11% 11% 11% 11% 11% 11% 11% 11%
72°F22°C 72°F22°C 72°F22°C 72°F22°C 71°F22°C 71°F22°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 71°F22°C 71°F22°C 72°F22°C 71°F22°C 69°F21°C 68°F20°C 68°F20°C 67°F19°C 67°F19°C 68°F20°C 68°F20°C 69°F21°C 69°F21°C 70°F21°C
77% 79% 85% 87% 87% 90% 90% 90% 90% 90% 79% 67% 59% 54% 47% 43% 42% 40% 39% 44% 49% 55% 61% 72%
S S SSE SSE SSE SSE SSE SSE SW SW SW SSW SSW W W WNW WNW WNW WNW W SSW SSW W NW
3 mph 3 mph 2 mph 2 mph 2 mph 2 mph 2 mph 2 mph 5 mph 5 mph 5 mph 6 mph 6 mph 6 mph 7 mph 7 mph 7 mph 7 mph 7 mph 7 mph 6 mph 6 mph 6 mph 1 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 6 mi10 km 6 mi10 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
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
Wind Direction
Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KMWA model statistics.

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Prob Precip % = Probability of Precipitation.

Simpson 36 Hour Forecast

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

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