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Dennison IL Weather - Mostly Clear - 86°F
Mostly Clear
86°F
Updated 6:27 pm
Feels Like 86°F
Humidity 63%
Wind N 0 mph
Barometer  29.99 in
Dew Point 72°F
Dennison IL Weather - Mostly Clear - 30°C
Mostly Clear
30°C
Updated 6:27 pm
Feels Like 30°C
Humidity 63%
Wind N 0 km/h
Barometer  101.5 kPa
Dew Point 22°C
Dennison, IL Weather and Current Conditionsdennison il weather forecast

Dennison, IL Weather Forecast

Dennison Illinois WeatherDennison, Illinois Weather Weather Forecast
14 day API forecast for Dennison, Illinois. Note. The 7-day weather forecast for Dennison, IL is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Dennison, IL Weather Forecast Dated: 627 PM Wed Sep 09 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Wednesday, September 9, 2026

Mid-Morning
Dennison Weather - 2026-09-09 - Morning - Sunny
76°F 24°C
Sunny
Mid-Afternoon
Dennison Weather - 2026-09-09 - Afternoon - Drizzle
86°F 30°C
Drizzle
Early-Evening
Dennison Weather - 2026-09-09 - Evening - Partly Cloudy
83°F 28°C
Partly Cloudy
Warm and summery around 86°F 30°C (feels like 91°F 33°C), drier morning followed by scattered afternoon showers, with lower humidity and steady pressure. Winds turning from the SSW to the W at 10 mph 16 km/h.

Thursday, September 10, 2026

Mid-Morning
Dennison Weather - 2026-09-10 - Morning - Light Fog
69°F 21°C
Light Fog
Mid-Afternoon
Dennison Weather - 2026-09-10 - Afternoon - Light Showers
69°F 21°C
Light Showers
Early-Evening
Dennison Weather - 2026-09-10 - Evening - Overcast
70°F 21°C
Overcast
Comfortable with temperatures reaching 69°F 21°C, clouds building with afternoon showers likely, with steady humidity and steady pressure.

Friday, September 11, 2026

Mid-Morning
Dennison Weather - 2026-09-11 - Morning - Overcast
65°F 18°C
Overcast
Mid-Afternoon
Dennison Weather - 2026-09-11 - Afternoon - Overcast
80°F 27°C
Overcast
Early-Evening
Dennison Weather - 2026-09-11 - Evening - Overcast
77°F 25°C
Overcast
Quite warm around 80°F 27°C, overcast throughout the day, with lower humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Dennison Weather - 2026-09-12 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Dennison Weather - 2026-09-12 - Afternoon - Partly Cloudy
86°F 30°C
Partly Cloudy
Early-Evening
Dennison Weather - 2026-09-12 - Evening - Sunny
82°F 28°C
Sunny
Warm temperatures up to 86°F 30°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and steady pressure.

Sunday, September 13, 2026

Mid-Morning
Dennison Weather - 2026-09-13 - Morning - Sunny
71°F 22°C
Sunny
Mid-Afternoon
Dennison Weather - 2026-09-13 - Afternoon - Overcast
87°F 30°C
Overcast
Early-Evening
Dennison Weather - 2026-09-13 - Evening - Partly Cloudy
83°F 28°C
Partly Cloudy
Very warm with a high of 87°F 30°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure.

Monday, September 14, 2026

Mid-Morning
Dennison Weather - 2026-09-14 - Morning - Cloudy
75°F 24°C
Cloudy
Mid-Afternoon
Dennison Weather - 2026-09-14 - Afternoon - Sunny
92°F 33°C
Sunny
Early-Evening
Dennison Weather - 2026-09-14 - Evening - Sunny
88°F 32°C
Sunny
Very hot with a high of 92°F 33°C, feeling closer to 96°F 36°C in the humidity, partly cloudy in the morning, cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds switching from the SSE to the S at 12 mph 19 km/h. Gusts up to 23 mph 37 km/h.

Tuesday, September 15, 2026

Mid-Morning
Dennison Weather - 2026-09-15 - Morning - Scattered Showers
75°F 24°C
Scattered Showers
Mid-Afternoon
Dennison Weather - 2026-09-15 - Afternoon - Scattered Showers
82°F 28°C
Scattered Showers
Early-Evening
Dennison Weather - 2026-09-15 - Evening - Scattered Showers
73°F 23°C
Scattered Showers
Warm and summery around 82°F 28°C (feels like 86°F 30°C), periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds increasing from the SE at 2 mph 4 km/h to NNE at 10 mph 16 km/h.

Wednesday, September 16, 2026

Mid-Morning
Dennison Weather - 2026-09-16 - Morning - Overcast
64°F 18°C
Overcast
Mid-Afternoon
Dennison Weather - 2026-09-16 - Afternoon - Partly Cloudy
79°F 26°C
Partly Cloudy
Early-Evening
Dennison Weather - 2026-09-16 - Evening - Overcast
76°F 25°C
Overcast
Enjoyable around 79°F 26°C, overcast in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds out of the NNE at 7 mph 11 km/h.

Thursday, September 17, 2026

Mid-Morning
Dennison Weather - 2026-09-17 - Morning - Partly Cloudy
69°F 20°C
Partly Cloudy
Mid-Afternoon
Dennison Weather - 2026-09-17 - Afternoon - Scattered Showers
73°F 23°C
Scattered Showers
Early-Evening
Dennison Weather - 2026-09-17 - Evening - Scattered Showers
67°F 20°C
Scattered Showers
Mild temperatures up to 73°F 23°C, locally heavy downpours at times, with increasing humidity and steady pressure. Winds shifting from the NE to the NNE at 6 mph 10 km/h.

Friday, September 18, 2026

Mid-Morning
Dennison Weather - 2026-09-18 - Morning - Sunny
66°F 19°C
Sunny
Mid-Afternoon
Dennison Weather - 2026-09-18 - Afternoon - Sunny
82°F 28°C
Sunny
Early-Evening
Dennison Weather - 2026-09-18 - Evening - Sunny
79°F 26°C
Sunny
Very warm with a high of 82°F 28°C, sunny throughout the day, with lower humidity and barometric pressure falling.

Saturday, September 19, 2026

Mid-Morning
Dennison Weather - 2026-09-19 - Morning - Overcast
73°F 23°C
Overcast
Mid-Afternoon
Dennison Weather - 2026-09-19 - Afternoon - Nearby Thunderstorms
96°F 35°C
Nearby Thunderstorms
Early-Evening
Dennison Weather - 2026-09-19 - Evening - Cloudy
92°F 33°C
Cloudy
Hot and sweltering around 96°F 35°C (heat index 100°F 38°C), locally heavy thunderstorms at times, with lower humidity and barometric pressure falling. Winds turning from the SSW to the S at 11 mph 18 km/h. Gusts up to 21 mph 32 km/h.

Sunday, September 20, 2026

Mid-Morning
Dennison Weather - 2026-09-20 - Morning - Sunny
76°F 24°C
Sunny
Mid-Afternoon
Dennison Weather - 2026-09-20 - Afternoon - Sunny
90°F 32°C
Sunny
Early-Evening
Dennison Weather - 2026-09-20 - Evening - Sunny
85°F 29°C
Sunny
Very hot with a high of 90°F 32°C, feeling closer to 93°F 34°C in the humidity, sunny throughout the day, with lower humidity and steady pressure. Winds switching from the NNW to the NE at 9 mph 14 km/h.

Monday, September 21, 2026

Mid-Morning
Dennison Weather - 2026-09-21 - Morning - Light Showers
70°F 21°C
Light Showers
Mid-Afternoon
Dennison Weather - 2026-09-21 - Afternoon - Overcast
80°F 27°C
Overcast
Early-Evening
Dennison Weather - 2026-09-21 - Evening - Partly Cloudy
77°F 25°C
Partly Cloudy
Warm and summery around 80°F 27°C (feels like 83°F 28°C), early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds moving from the WSW to the ENE at 8 mph 12 km/h.

Tuesday, September 22, 2026

Mid-Morning
Dennison Weather - 2026-09-22 - Morning - Overcast
71°F 22°C
Overcast
Mid-Afternoon
Dennison Weather - 2026-09-22 - Afternoon - Light Showers
80°F 27°C
Light Showers
Early-Evening
Dennison Weather - 2026-09-22 - Evening - Scattered Showers
75°F 24°C
Scattered Showers
Quite warm reaching 80°F 27°C, feeling like 83°F 28°C during peak afternoon, scattered downpours possible, with lower humidity and steady pressure. Winds swinging from the SSW to the NNW at 7 mph 11 km/h.

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Weather by the Numbers

Wed, 9th
Dennison IL Weather - Wednesday, Sep 9, 2026 - Sunny
Hi: 94°F 35°C
Lo: 69°F 21°C
Sunrise 07:26 AM
Sunset 08:08 PM
Wind SW 13 mph20 km/h
Dew Point 74°F23°C
uv Index 6
Barometric Pressure 30.03 in1017 mb
POP 2% *
Humidity 53%
Thu, 10th
Dennison IL Weather - Thursday, Sep 10, 2026 - Patchy Rain Nearby
Hi: 72°F 22°C
Lo: 68°F 20°C
Sunrise 07:27 AM
Sunset 08:06 PM
Wind WNW 3 mph5 km/h
Dew Point 68°F20°C
uv Index 1
Barometric Pressure 30.03 in1017 mb
POP 33% *
Humidity 93%
Fri, 11th
Dennison IL Weather - Friday, Sep 11, 2026 - Overcast
Hi: 80°F 27°C
Lo: 65°F 18°C
Sunrise 07:28 AM
Sunset 08:05 PM
Wind ESE 6 mph9 km/h
Dew Point 63°F17°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 17% *
Humidity 69%
Sat, 12th
Dennison IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 87°F 31°C
Lo: 69°F 20°C
Sunrise 07:29 AM
Sunset 08:03 PM
Wind SSW 6 mph9 km/h
Dew Point 67°F19°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 14% *
Humidity 65%
Sun, 13th
Dennison IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 87°F 31°C
Lo: 70°F 21°C
Sunrise 07:30 AM
Sunset 08:01 PM
Wind ESE 5 mph8 km/h
Dew Point 67°F20°C
uv Index 6
Barometric Pressure 30.03 in1017 mb
POP 14% *
Humidity 63%
Mon, 14th
Dennison IL Weather - Monday, Sep 14, 2026 - Overcast
Hi: 93°F 34°C
Lo: 71°F 22°C
Sunrise 07:30 AM
Sunset 08:00 PM
Wind S 11 mph18 km/h
Dew Point 69°F20°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 12% *
Humidity 59%
Tue, 15th
Dennison IL Weather - Tuesday, Sep 15, 2026 - Patchy Rain Nearby
Hi: 84°F 29°C
Lo: 68°F 20°C
Sunrise 07:31 AM
Sunset 07:58 PM
Wind NNW 5 mph9 km/h
Dew Point 70°F21°C
uv Index 6
Barometric Pressure 30.09 in1019 mb
POP 25% *
Humidity 69%
Wed, 16th
Dennison IL Weather - Wednesday, Sep 16, 2026 - Partly Cloudy
Hi: 81°F 27°C
Lo: 61°F 16°C
Sunrise 07:32 AM
Sunset 07:57 PM
Wind NE 7 mph12 km/h
Dew Point 53°F12°C
uv Index 6
Barometric Pressure 30.27 in1025 mb
POP 8% *
Humidity 51%
Thu, 17th
Dennison IL Weather - Thursday, Sep 17, 2026 - Overcast
Hi: 75°F 24°C
Lo: 65°F 18°C
Sunrise 07:33 AM
Sunset 07:55 PM
Wind NNE 8 mph13 km/h
Dew Point 60°F16°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 9% *
Humidity 61%
Fri, 18th
Dennison IL Weather - Friday, Sep 18, 2026 - Sunny
Hi: 83°F 28°C
Lo: 63°F 17°C
Sunrise 07:34 AM
Sunset 07:53 PM
Wind ENE 3 mph5 km/h
Dew Point 60°F16°C
uv Index 6
Barometric Pressure 30.18 in1022 mb
POP 3% *
Humidity 60%
Sat, 19th
Dennison IL Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 97°F 36°C
Lo: 69°F 21°C
Sunrise 07:35 AM
Sunset 07:52 PM
Wind SW 18 mph29 km/h
Dew Point 65°F18°C
uv Index 7
Barometric Pressure 29.83 in1010 mb
POP 7% *
Humidity 51%
Sun, 20th
Dennison IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 92°F 33°C
Lo: 73°F 23°C
Sunrise 07:36 AM
Sunset 07:50 PM
Wind NNW 6 mph9 km/h
Dew Point 67°F20°C
uv Index 7
Barometric Pressure 29.8 in1009 mb
POP 3% *
Humidity 59%
Mon, 21st
Dennison IL Weather - Monday, Sep 21, 2026 - Cloudy
Hi: 81°F 27°C
Lo: 69°F 21°C
Sunrise 07:37 AM
Sunset 07:49 PM
Wind ENE 8 mph13 km/h
Dew Point 68°F20°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 55% *
Humidity 84%
Tue, 22nd
Dennison IL Weather - Tuesday, Sep 22, 2026 - Patchy Rain Nearby
Hi: 81°F 27°C
Lo: 69°F 21°C
Sunrise 07:38 AM
Sunset 07:47 PM
Wind W 5 mph8 km/h
Dew Point 69°F20°C
uv Index 5
Barometric Pressure 29.85 in1011 mb
POP 21% *
Humidity 76%
* POP = Probability of Precipitation. Data for 12:00 PM.