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Allendale IL Weather - Clear - 77°F
Clear
77°F
Updated 8:36 am
Feels Like 77°F
Humidity 86%
Wind S 10 mph
Barometer  30.11 in
Dew Point 73°F
Allendale IL Weather - Clear - 25°C
Clear
25°C
Updated 8:36 am
Feels Like 25°C
Humidity 86%
Wind S 16 km/h
Barometer  101.9 kPa
Dew Point 23°C
Allendale, IL Weather and Current Conditionsallendale il weather forecast

Allendale, IL Weather Forecast

Allendale Illinois WeatherAllendale, Illinois Weather Weather Forecast
14 day API Allendale, IL weather forecast. Note. Our 7-day weather forecast for Allendale, Illinois is our most reliable and accurate forecast. This model should only be used as a likely scenario. Forecasting more than 7 days is difficult.
Allendale, IL Weather Forecast Dated: 836 AM Wed Sep 09 2026
Expect a hot stretch with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.

Wednesday, September 9, 2026

Mid-Morning
Allendale Weather - 2026-09-09 - Morning - Overcast
83°F 28°C
Overcast
Mid-Afternoon
Allendale Weather - 2026-09-09 - Afternoon - Cloudy
91°F 33°C
Cloudy
Early-Evening
Allendale Weather - 2026-09-09 - Evening - Partly Cloudy
83°F 28°C
Partly Cloudy
Sizzling hot near 91°F 33°C with a heat index reaching 95°F 35°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds turning from the SSW to the NW at 16 mph 25 km/h. Gusts up to 26 mph 41 km/h.

Thursday, September 10, 2026

Mid-Morning
Allendale Weather - 2026-09-10 - Morning - Overcast
75°F 24°C
Overcast
Mid-Afternoon
Allendale Weather - 2026-09-10 - Afternoon - Light Showers
73°F 23°C
Light Showers
Early-Evening
Allendale Weather - 2026-09-10 - Evening - Light Showers
72°F 23°C
Light Showers
Comfortable with temperatures reaching 73°F 23°C, clouds and showers taking over for the afternoon and evening, with steady humidity and steady pressure. Winds switching from the SSW to the NNE at 2 mph 4 km/h.

Friday, September 11, 2026

Mid-Morning
Allendale Weather - 2026-09-11 - Morning - Overcast
71°F 21°C
Overcast
Mid-Afternoon
Allendale Weather - 2026-09-11 - Afternoon - Overcast
84°F 29°C
Overcast
Early-Evening
Allendale Weather - 2026-09-11 - Evening - Overcast
78°F 25°C
Overcast
Quite warm around 84°F 29°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Allendale Weather - 2026-09-12 - Morning - Partly Cloudy
75°F 24°C
Partly Cloudy
Mid-Afternoon
Allendale Weather - 2026-09-12 - Afternoon - Partly Cloudy
90°F 32°C
Partly Cloudy
Early-Evening
Allendale Weather - 2026-09-12 - Evening - Overcast
82°F 28°C
Overcast
Hot temperatures near 90°F 32°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.

Sunday, September 13, 2026

Mid-Morning
Allendale Weather - 2026-09-13 - Morning - Overcast
79°F 26°C
Overcast
Mid-Afternoon
Allendale Weather - 2026-09-13 - Afternoon - Partly Cloudy
91°F 33°C
Partly Cloudy
Early-Evening
Allendale Weather - 2026-09-13 - Evening - Sunny
86°F 30°C
Sunny
Very hot with a high of 91°F 33°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds moving from the S to the SSE at 9 mph 14 km/h.

Monday, September 14, 2026

Mid-Morning
Allendale Weather - 2026-09-14 - Morning - Partly Cloudy
82°F 28°C
Partly Cloudy
Mid-Afternoon
Allendale Weather - 2026-09-14 - Afternoon - Partly Cloudy
96°F 35°C
Partly Cloudy
Early-Evening
Allendale Weather - 2026-09-14 - Evening - Scattered Showers
88°F 31°C
Scattered Showers
Very hot with temperatures reaching 96°F 35°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds out of the SW at 13 mph 20 km/h. Gusts up to 22 mph 35 km/h.

Tuesday, September 15, 2026

Mid-Morning
Allendale Weather - 2026-09-15 - Morning - Scattered Showers
81°F 27°C
Scattered Showers
Mid-Afternoon
Allendale Weather - 2026-09-15 - Afternoon - Scattered Showers
92°F 33°C
Scattered Showers
Early-Evening
Allendale Weather - 2026-09-15 - Evening - Nearby Thunderstorms
80°F 27°C
Nearby Thunderstorms
Sizzling hot near 92°F 33°C with a heat index reaching 98°F 37°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds shifting from the WSW to the SE at 10 mph 16 km/h. Gusts up to 21 mph 33 km/h.

Wednesday, September 16, 2026

Mid-Morning
Allendale Weather - 2026-09-16 - Morning - Sunny
68°F 20°C
Sunny
Mid-Afternoon
Allendale Weather - 2026-09-16 - Afternoon - Sunny
85°F 29°C
Sunny
Early-Evening
Allendale Weather - 2026-09-16 - Evening - Sunny
77°F 25°C
Sunny
Quite warm around 85°F 29°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds turning from the NE to the ENE at 9 mph 14 km/h.

Thursday, September 17, 2026

Mid-Morning
Allendale Weather - 2026-09-17 - Morning - Sunny
72°F 22°C
Sunny
Mid-Afternoon
Allendale Weather - 2026-09-17 - Afternoon - Sunny
90°F 32°C
Sunny
Early-Evening
Allendale Weather - 2026-09-17 - Evening - Sunny
84°F 29°C
Sunny
Hot temperatures near 90°F 32°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds switching from the ESE to the SE at 8 mph 12 km/h.

Friday, September 18, 2026

Mid-Morning
Allendale Weather - 2026-09-18 - Morning - Sunny
84°F 29°C
Sunny
Mid-Afternoon
Allendale Weather - 2026-09-18 - Afternoon - Sunny
101°F 38°C
Sunny
Early-Evening
Allendale Weather - 2026-09-18 - Evening - Partly Cloudy
95°F 35°C
Partly Cloudy
Sweltering heat reaching 101°F 38°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds moving from the SW to the SSE at 7 mph 11 km/h.

Saturday, September 19, 2026

Mid-Morning
Allendale Weather - 2026-09-19 - Morning - Sunny
88°F 31°C
Sunny
Mid-Afternoon
Allendale Weather - 2026-09-19 - Afternoon - Sunny
100°F 38°C
Sunny
Early-Evening
Allendale Weather - 2026-09-19 - Evening - Sunny
84°F 29°C
Sunny
Sweltering temperatures near 100°F 38°C with a heat index of 103°F 40°C, sunny through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds swinging from the WNW to the E at 10 mph 16 km/h.

Sunday, September 20, 2026

Mid-Morning
Allendale Weather - 2026-09-20 - Morning - Light Fog
82°F 28°C
Light Fog
Mid-Afternoon
Allendale Weather - 2026-09-20 - Afternoon - Sunny
103°F 39°C
Sunny
Early-Evening
Allendale Weather - 2026-09-20 - Evening - Overcast
93°F 34°C
Overcast
Dangerously hot with a high of 103°F 39°C, sunny in the morning, cloudy in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds shifting from the SSE to the S at 10 mph 16 km/h. Gusts up to 22 mph 35 km/h.

Monday, September 21, 2026

Mid-Morning
Allendale Weather - 2026-09-21 - Morning - Sunny
91°F 33°C
Sunny
Mid-Afternoon
Allendale Weather - 2026-09-21 - Afternoon - Overcast
92°F 34°C
Overcast
Early-Evening
Allendale Weather - 2026-09-21 - Evening - Partly Cloudy
77°F 26°C
Partly Cloudy
Sizzling hot with 92°F 34°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure. Winds turning from the SW to the SE at 16 mph 26 km/h. Gusts up to 28 mph 44 km/h.

Tuesday, September 22, 2026

Mid-Morning
Allendale Weather - 2026-09-22 - Morning - Scattered Showers
68°F 20°C
Scattered Showers
Mid-Afternoon
Allendale Weather - 2026-09-22 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Allendale Weather - 2026-09-22 - Evening - Overcast
71°F 22°C
Overcast
Mild temperatures up to 77°F 25°C, scattered downpours possible, with lower humidity and steady pressure. Winds NNE at 15 mph 24 km/h. Gusts up to 21 mph 33 km/h.

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Weather by the Numbers

Wed, 9th
Allendale IL Weather - Wednesday, Sep 9, 2026 - Cloudy
Hi: 95°F 35°C
Lo: 70°F 21°C
Sunrise 06:27 AM
Sunset 07:09 PM
Wind SW 14 mph23 km/h
Dew Point 63°F17°C
uv Index 7
Barometric Pressure 30.03 in1017 mb
POP 8% *
Humidity 35%
Thu, 10th
Allendale IL Weather - Thursday, Sep 10, 2026 - Overcast
Hi: 79°F 26°C
Lo: 70°F 21°C
Sunrise 06:28 AM
Sunset 07:07 PM
Wind NNW 1 mph2 km/h
Dew Point 71°F22°C
uv Index 2
Barometric Pressure 29.97 in1015 mb
POP 24% *
Humidity 80%
Fri, 11th
Allendale IL Weather - Friday, Sep 11, 2026 - Overcast
Hi: 85°F 29°C
Lo: 68°F 20°C
Sunrise 06:29 AM
Sunset 07:05 PM
Wind W 3 mph5 km/h
Dew Point 68°F20°C
uv Index 5
Barometric Pressure 29.97 in1015 mb
POP 22% *
Humidity 78%
Sat, 12th
Allendale IL Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 90°F 32°C
Lo: 70°F 21°C
Sunrise 06:30 AM
Sunset 07:04 PM
Wind SSW 7 mph12 km/h
Dew Point 64°F18°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 2% *
Humidity 49%
Sun, 13th
Allendale IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 92°F 33°C
Lo: 72°F 22°C
Sunrise 06:31 AM
Sunset 07:02 PM
Wind S 9 mph14 km/h
Dew Point 65°F18°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 10% *
Humidity 42%
Mon, 14th
Allendale IL Weather - Monday, Sep 14, 2026 - Overcast
Hi: 97°F 36°C
Lo: 75°F 24°C
Sunrise 06:32 AM
Sunset 07:01 PM
Wind WSW 11 mph18 km/h
Dew Point 62°F17°C
uv Index 7
Barometric Pressure 29.97 in1015 mb
POP 6% *
Humidity 37%
Tue, 15th
Allendale IL Weather - Tuesday, Sep 15, 2026 - Patchy Rain Nearby
Hi: 92°F 33°C
Lo: 70°F 21°C
Sunrise 06:33 AM
Sunset 06:59 PM
Wind W 11 mph18 km/h
Dew Point 68°F20°C
uv Index 7
Barometric Pressure 30 in1016 mb
POP 17% *
Humidity 50%
Wed, 16th
Allendale IL Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 86°F 30°C
Lo: 61°F 16°C
Sunrise 06:33 AM
Sunset 06:57 PM
Wind NE 10 mph15 km/h
Dew Point 52°F11°C
uv Index 7
Barometric Pressure 30.27 in1025 mb
POP 1% *
Humidity 40%
Thu, 17th
Allendale IL Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 91°F 33°C
Lo: 64°F 18°C
Sunrise 06:34 AM
Sunset 06:56 PM
Wind SE 8 mph12 km/h
Dew Point 53°F12°C
uv Index 7
Barometric Pressure 30.24 in1024 mb
POP 1% *
Humidity 36%
Fri, 18th
Allendale IL Weather - Friday, Sep 18, 2026 - Sunny
Hi: 101°F 38°C
Lo: 76°F 24°C
Sunrise 06:35 AM
Sunset 06:54 PM
Wind WSW 7 mph11 km/h
Dew Point 61°F16°C
uv Index 9
Barometric Pressure 30.12 in1020 mb
POP 0% *
Humidity 32%
Sat, 19th
Allendale IL Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 101°F 38°C
Lo: 78°F 25°C
Sunrise 06:36 AM
Sunset 06:53 PM
Wind WNW 7 mph12 km/h
Dew Point 62°F16°C
uv Index 9
Barometric Pressure 29.97 in1015 mb
POP 0% *
Humidity 31%
Sun, 20th
Allendale IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 103°F 40°C
Lo: 73°F 23°C
Sunrise 06:37 AM
Sunset 06:51 PM
Wind SW 5 mph8 km/h
Dew Point 61°F16°C
uv Index 9
Barometric Pressure 29.97 in1015 mb
POP 0% *
Humidity 33%
Mon, 21st
Allendale IL Weather - Monday, Sep 21, 2026 - Sunny
Hi: 102°F 39°C
Lo: 72°F 22°C
Sunrise 06:38 AM
Sunset 06:49 PM
Wind WSW 15 mph24 km/h
Dew Point 58°F15°C
uv Index 9
Barometric Pressure 30 in1016 mb
POP 5% *
Humidity 26%
Tue, 22nd
Allendale IL Weather - Tuesday, Sep 22, 2026 - Light Rain Shower
Hi: 78°F 25°C
Lo: 64°F 18°C
Sunrise 06:39 AM
Sunset 06:48 PM
Wind NE 12 mph19 km/h
Dew Point 57°F14°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 20% *
Humidity 55%
* POP = Probability of Precipitation. Data for 12:00 PM.