Weather Alert
Denison Weather Warning NWS WEATHER ALERT FOR THE DENISON, IL AREA - Issued: 402 AM CDT Tue Sep 15 2026 Denison Weather Warning

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Denison, IL Weather - Hour by Hour Forecast

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Denison, IL Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Clear. Temperature is 66°F19°C, dew point 63°F17°C, humidity 88%. Wind direction is N at 0 mph0 km/h with visibility of 10 mi16 km. Barometric pressure is 30.09 in1018 mb.
Today - Sunny, warmer with highs in the upper 90s. South winds 5 to 10 mph. Heat index values up to 104 this afternoon... Full Forecast
Tonight - Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of thunderstorms. A chance of showers, mainly in the ev.. Full Forecast

Denison Hourly Weather

24 Hour Forecast Scroll
Tue, Sep 15
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Midnight
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Denison, IL Hourly Weather - Clear - 6:00 AM Denison, IL Hourly Weather - Clear - 7:00 AM Denison, IL Hourly Weather - Clear - 8:00 AM Denison, IL Hourly Weather - Clear - 9:00 AM Denison, IL Hourly Weather - Clear - 10:00 AM Denison, IL Hourly Weather - Clear - 11:00 AM Denison, IL Hourly Weather - Clear - 12:00 PM Denison, IL Hourly Weather - Clear - 1:00 PM Denison, IL Hourly Weather - Clear - 2:00 PM Denison, IL Hourly Weather - Partly Cloudy - 3:00 PM Denison, IL Hourly Weather - Partly Cloudy - 4:00 PM Denison, IL Hourly Weather - Partly Cloudy - 5:00 PM Denison, IL Hourly Weather - Mostly Cloudy - 6:00 PM Denison, IL Hourly Weather - Mostly Cloudy - 7:00 PM Denison, IL Hourly Weather - Mostly Cloudy - 8:00 PM Denison, IL Hourly Weather - Cloudy - 9:00 PM Denison, IL Hourly Weather - Cloudy - 10:00 PM Denison, IL Hourly Weather - Cloudy - 11:00 PM Denison, IL Hourly Weather - Cloudy - 12:00 AM Denison, IL Hourly Weather - Cloudy - 1:00 AM Denison, IL Hourly Weather - Cloudy - 2:00 AM Denison, IL Hourly Weather - Cloudy - 3:00 AM Denison, IL Hourly Weather - Cloudy - 4:00 AM Denison, IL Hourly Weather - Cloudy - 5:00 AM
Clear Clear Clear Clear Clear Clear Clear Clear Clear Partly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
66°F19°C 66°F19°C 72°F22°C 79°F26°C 85°F29°C 88°F31°C 92°F33°C 95°F35°C 96°F36°C 98°F37°C 99°F37°C 96°F36°C 93°F34°C 90°F32°C 86°F30°C 82°F28°C 78°F26°C 77°F25°C 76°F24°C 75°F24°C 74°F23°C 74°F23°C 73°F23°C 73°F23°C
- - - - - - - - - - - - - - Rain Rain Rain Rain Rain Rain Rain Rain Rain Rain
0% 0% 1% 1% 1% 1% 1% 1% 15% 15% 15% 15% 15% 15% 30% 30% 30% 30% 30% 30% 26% 26% 26% 26%
61°F16°C 62°F17°C 64°F18°C 66°F19°C 68°F20°C 67°F19°C 66°F19°C 65°F18°C 65°F18°C 64°F18°C 64°F18°C 65°F18°C 67°F19°C 68°F20°C 69°F21°C 69°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 70°F21°C 69°F21°C 69°F21°C 69°F21°C
84% 87% 76% 65% 57% 50% 43% 38% 36% 33% 32% 36% 43% 49% 57% 65% 77% 79% 82% 84% 87% 84% 87% 87%
SE SE SSE S SSE SW SW SW SW SW SW S S SSE SE E ENE E E E E E E E
4 mph 4 mph 4 mph 10 mph 10 mph 10 mph 10 mph 10 mph 10 mph 8 mph 8 mph 8 mph 4 mph 4 mph 4 mph 5 mph 5 mph 5 mph 3 mph 3 mph 3 mph 1 mph 1 mph 1 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
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Visibility
POP = Probability of Precipitation. ** Indicates missing data/values from KAJG model statistics.

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Prob Precip % = Probability of Precipitation.

Denison 36 Hour Forecast

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

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