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Jefferson Weather Warning NWS WEATHER ALERT FOR THE JEFFERSON, IL AREA - Issued: 332 AM CDT Tue Sep 22 2026 Jefferson Weather Warning

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Jefferson, IL Weather - Hour by Hour Forecast

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Jefferson, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Mostly Cloudy. Temperature is 59°F15°C, dew point 46°F8°C, humidity 62%. Wind direction is E at 16 mph26 km/h with visibility of 10 mi16 km. Barometric pressure is 30.28 in1025 mb.
Today - Mostly cloudy. A slight chance of showers early in the morning. A slight chance of showers in the afternoon. Highs in the mid 60s... Full Forecast
Tonight - Cloudy. A slight chance of showers in the evening. Lows in the upper 50s. Northeast winds 10 to 15 mph. Chance of precipitation 20.. Full Forecast

Jefferson Hourly Weather

24 Hour Forecast Scroll
Tue, Sep 22
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Jefferson, IL Hourly Weather - Cloudy - 10:00 AM Jefferson, IL Hourly Weather - Cloudy - 11:00 AM Jefferson, IL Hourly Weather - Cloudy - 12:00 PM Jefferson, IL Hourly Weather - Cloudy - 1:00 PM Jefferson, IL Hourly Weather - Cloudy - 2:00 PM Jefferson, IL Hourly Weather - Cloudy - 3:00 PM Jefferson, IL Hourly Weather - Cloudy - 4:00 PM Jefferson, IL Hourly Weather - Cloudy - 5:00 PM Jefferson, IL Hourly Weather - Cloudy - 6:00 PM Jefferson, IL Hourly Weather - Cloudy - 7:00 PM Jefferson, IL Hourly Weather - Cloudy - 8:00 PM Jefferson, IL Hourly Weather - Cloudy - 9:00 PM Jefferson, IL Hourly Weather - Cloudy - 10:00 PM Jefferson, IL Hourly Weather - Cloudy - 11:00 PM Jefferson, IL Hourly Weather - Cloudy - 12:00 AM Jefferson, IL Hourly Weather - Cloudy - 1:00 AM Jefferson, IL Hourly Weather - Cloudy - 2:00 AM Jefferson, IL Hourly Weather - Cloudy - 3:00 AM Jefferson, IL Hourly Weather - Cloudy - 4:00 AM Jefferson, IL Hourly Weather - Cloudy - 5:00 AM Jefferson, IL Hourly Weather - Mostly Cloudy - 6:00 AM Jefferson, IL Hourly Weather - Mostly Cloudy - 7:00 AM Jefferson, IL Hourly Weather - Mostly Cloudy - 8:00 AM Jefferson, IL Hourly Weather - Cloudy - 9:00 AM
Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy
60°F16°C 61°F16°C 62°F17°C 63°F17°C 64°F18°C 64°F18°C 65°F18°C 64°F18°C 63°F17°C 62°F17°C 61°F16°C 60°F16°C 59°F15°C 59°F15°C 58°F14°C 58°F14°C 58°F14°C 57°F14°C 57°F14°C 57°F14°C 57°F14°C 57°F14°C 59°F15°C 61°F16°C
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9% 9% 9% 9% 12% 12% 12% 12% 12% 12% 7% 7% 7% 7% 7% 7% 2% 2% 2% 2% 2% 2% 2% 2%
48°F9°C 48°F9°C 47°F8°C 47°F8°C 47°F8°C 46°F8°C 46°F8°C 46°F8°C 45°F7°C 45°F7°C 45°F7°C 46°F8°C 46°F8°C 47°F8°C 48°F9°C 49°F9°C 49°F9°C 49°F9°C 49°F9°C 49°F9°C 50°F10°C 50°F10°C 51°F11°C 51°F11°C
65% 62% 58% 56% 54% 52% 50% 52% 52% 54% 56% 60% 62% 64% 69% 72% 72% 75% 75% 75% 77% 77% 75% 70%
ENE ENE ENE ENE ENE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE
13 mph 13 mph 13 mph 13 mph 13 mph 14 mph 14 mph 14 mph 12 mph 12 mph 12 mph 11 mph 11 mph 11 mph 10 mph 10 mph 10 mph 9 mph 9 mph 9 mph 9 mph 9 mph 9 mph 13 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 10 mi16 km 10 mi16 km 10 mi16 km
Hour (CDT)
Weather
Clouds
Temperature
Precip. Type
POP
Dewpoint
Humidity
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Wind Speed
Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KORD model statistics.

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Prob Precip % = Probability of Precipitation.

Jefferson 36 Hour Forecast

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

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