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Allerton IL Weather - Partly Cloudy - 73°F
Partly Cloudy
73°F
Updated 2:45 am
Feels Like 70°F
Humidity 93%
Wind NE 10 mph
Barometer  30.18 in
Dew Point 71°F
Allerton IL Weather - Partly Cloudy - 23°C
Partly Cloudy
23°C
Updated 2:45 am
Feels Like 21°C
Humidity 93%
Wind NE 16 km/h
Barometer  102.2 kPa
Dew Point 22°C
Allerton, IL Weather and Current Conditionsallerton il weather forecast

Allerton, IL Weather Forecast

Allerton Illinois WeatherAllerton, Illinois Weather Weather Forecast
14 Day API Allerton, IL Weather Forecast. Note: Our 7 day Allerton, Illinois weather forecast is our most reliable, and specific forecast. This model should only be used as a probable scenario. Forecasting more than 7 days ahead is challenging.
Allerton, IL Weather Forecast Dated: 245 AM Fri Sep 18 2026
Expect a mild stretch with more clouds than sun and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Friday, September 18, 2026

Mid-Morning
Allerton Weather - 2026-09-18 - Morning - Scattered Showers
70°F 21°C
Scattered Showers
Mid-Afternoon
Allerton Weather - 2026-09-18 - Afternoon - Cloudy
79°F 26°C
Cloudy
Early-Evening
Allerton Weather - 2026-09-18 - Evening - Sunny
72°F 23°C
Sunny
Pleasant near 79°F 26°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds turning from the ENE to the E at 11 mph 18 km/h.

Saturday, September 19, 2026

Mid-Morning
Allerton Weather - 2026-09-19 - Morning - Light Showers
68°F 20°C
Light Showers
Mid-Afternoon
Allerton Weather - 2026-09-19 - Afternoon - Overcast
88°F 31°C
Overcast
Early-Evening
Allerton Weather - 2026-09-19 - Evening - Overcast
81°F 27°C
Overcast
Quite warm reaching 88°F 31°C, feeling like 92°F 33°C during peak afternoon, scattered morning showers before drying out later, with lower humidity and barometric pressure falling. Winds blowing from the SSW at 2 mph 4 km/h.

Sunday, September 20, 2026

Mid-Morning
Allerton Weather - 2026-09-20 - Morning - Cloudy
75°F 24°C
Cloudy
Mid-Afternoon
Allerton Weather - 2026-09-20 - Afternoon - Overcast
83°F 28°C
Overcast
Early-Evening
Allerton Weather - 2026-09-20 - Evening - Overcast
71°F 22°C
Overcast
Quite warm around 83°F 28°C, overcast through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds increasing from the SSE at 3 mph 5 km/h to NNE at 11 mph 17 km/h.

Monday, September 21, 2026

Mid-Morning
Allerton Weather - 2026-09-21 - Morning - Light Showers
63°F 17°C
Light Showers
Mid-Afternoon
Allerton Weather - 2026-09-21 - Afternoon - Scattered Showers
70°F 21°C
Scattered Showers
Early-Evening
Allerton Weather - 2026-09-21 - Evening - Overcast
66°F 19°C
Overcast
Mild temperatures up to 70°F 21°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the NE at 8 mph 13 km/h.

Tuesday, September 22, 2026

Mid-Morning
Allerton Weather - 2026-09-22 - Morning - Scattered Showers
60°F 15°C
Scattered Showers
Mid-Afternoon
Allerton Weather - 2026-09-22 - Afternoon - Scattered Showers
61°F 16°C
Scattered Showers
Early-Evening
Allerton Weather - 2026-09-22 - Evening - Scattered Showers
59°F 15°C
Scattered Showers
Refreshing around 61°F 16°C, scattered downpours possible, with steady humidity and steady pressure. Winds blowing from the NNE at 8 mph 13 km/h.

Wednesday, September 23, 2026

Mid-Morning
Allerton Weather - 2026-09-23 - Morning - Light Fog
59°F 15°C
Light Fog
Mid-Afternoon
Allerton Weather - 2026-09-23 - Afternoon - Scattered Showers
67°F 20°C
Scattered Showers
Early-Evening
Allerton Weather - 2026-09-23 - Evening - Scattered Showers
64°F 18°C
Scattered Showers
Mildly cool near 67°F 20°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds turning from the NNE to the NNW at 7 mph 11 km/h.

Thursday, September 24, 2026

Mid-Morning
Allerton Weather - 2026-09-24 - Morning - Overcast
61°F 16°C
Overcast
Mid-Afternoon
Allerton Weather - 2026-09-24 - Afternoon - Overcast
68°F 20°C
Overcast
Early-Evening
Allerton Weather - 2026-09-24 - Evening - Overcast
65°F 18°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, overcast throughout the day, with steady humidity and steady pressure. Winds switching from the WSW to the NNW at 8 mph 12 km/h.

Friday, September 25, 2026

Mid-Morning
Allerton Weather - 2026-09-25 - Morning - Light Fog
63°F 17°C
Light Fog
Mid-Afternoon
Allerton Weather - 2026-09-25 - Afternoon - Partly Cloudy
70°F 21°C
Partly Cloudy
Early-Evening
Allerton Weather - 2026-09-25 - Evening - Overcast
62°F 17°C
Overcast
Enjoyable around 70°F 21°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds moving from the SE to the NE at 9 mph 13 km/h.

Saturday, September 26, 2026

Mid-Morning
Allerton Weather - 2026-09-26 - Morning - Overcast
56°F 13°C
Overcast
Mid-Afternoon
Allerton Weather - 2026-09-26 - Afternoon - Overcast
69°F 20°C
Overcast
Early-Evening
Allerton Weather - 2026-09-26 - Evening - Sunny
61°F 16°C
Sunny
Mild temperatures up to 69°F 20°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds ENE at 7 mph 12 km/h.

Sunday, September 27, 2026

Mid-Morning
Allerton Weather - 2026-09-27 - Morning - Cloudy
60°F 16°C
Cloudy
Mid-Afternoon
Allerton Weather - 2026-09-27 - Afternoon - Sunny
76°F 24°C
Sunny
Early-Evening
Allerton Weather - 2026-09-27 - Evening - Overcast
72°F 22°C
Overcast
Mild with a high of 76°F 24°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling. Winds shifting from the SE to the ESE at 8 mph 13 km/h.

Monday, September 28, 2026

Mid-Morning
Allerton Weather - 2026-09-28 - Morning - Partly Cloudy
69°F 21°C
Partly Cloudy
Mid-Afternoon
Allerton Weather - 2026-09-28 - Afternoon - Sunny
85°F 30°C
Sunny
Early-Evening
Allerton Weather - 2026-09-28 - Evening - Sunny
77°F 25°C
Sunny
Warm and summery near 85°F 30°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the S to the SSE at 10 mph 16 km/h. Gusts up to 22 mph 36 km/h.

Tuesday, September 29, 2026

Mid-Morning
Allerton Weather - 2026-09-29 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Allerton Weather - 2026-09-29 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Allerton Weather - 2026-09-29 - Evening - Overcast
76°F 25°C
Overcast
Balmy with temperatures reaching 84°F 29°C, sunny in the morning, cloudy in the afternoon, and sunny this evening, with increasing humidity and steady pressure. Winds switching from the S to the ESE at 8 mph 13 km/h.

Wednesday, September 30, 2026

Mid-Morning
Allerton Weather - 2026-09-30 - Morning - Overcast
69°F 21°C
Overcast
Mid-Afternoon
Allerton Weather - 2026-09-30 - Afternoon - Cloudy
81°F 27°C
Cloudy
Early-Evening
Allerton Weather - 2026-09-30 - Evening - Cloudy
74°F 24°C
Cloudy
Quite warm around 81°F 27°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure.

Thursday, October 1, 2026

Mid-Morning
Allerton Weather - 2026-10-01 - Morning - Overcast
62°F 16°C
Overcast
Mid-Afternoon
Allerton Weather - 2026-10-01 - Afternoon - Overcast
61°F 16°C
Overcast
Early-Evening
Allerton Weather - 2026-10-01 - Evening - Overcast
56°F 14°C
Overcast
Mildly cool near 61°F 16°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds out of the NNW at 14 mph 22 km/h. Gusts up to 23 mph 37 km/h.

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Weather by the Numbers

Fri, 18th
Allerton IL Weather - Friday, Sep 18, 2026 - Partly Cloudy
Hi: 79°F 26°C
Lo: 66°F 19°C
Sunrise 06:35 AM
Sunset 06:55 PM
Wind ENE 7 mph12 km/h
Dew Point 70°F21°C
uv Index 6
Barometric Pressure 30.15 in1021 mb
POP 12% *
Humidity 77%
Sat, 19th
Allerton IL Weather - Saturday, Sep 19, 2026 - Cloudy
Hi: 88°F 31°C
Lo: 65°F 18°C
Sunrise 06:36 AM
Sunset 06:54 PM
Wind SE 8 mph12 km/h
Dew Point 68°F20°C
uv Index 3
Barometric Pressure 30 in1016 mb
POP 12% *
Humidity 71%
Sun, 20th
Allerton IL Weather - Sunday, Sep 20, 2026 - Partly Cloudy
Hi: 83°F 28°C
Lo: 65°F 18°C
Sunrise 06:37 AM
Sunset 06:52 PM
Wind SW 1 mph1 km/h
Dew Point 63°F17°C
uv Index 5
Barometric Pressure 29.85 in1011 mb
POP 8% *
Humidity 61%
Mon, 21st
Allerton IL Weather - Monday, Sep 21, 2026 - Overcast
Hi: 72°F 22°C
Lo: 60°F 16°C
Sunrise 06:38 AM
Sunset 06:50 PM
Wind ENE 8 mph13 km/h
Dew Point 64°F18°C
uv Index 1
Barometric Pressure 29.94 in1014 mb
POP 28% *
Humidity 87%
Tue, 22nd
Allerton IL Weather - Tuesday, Sep 22, 2026 - Overcast
Hi: 62°F 17°C
Lo: 56°F 13°C
Sunrise 06:39 AM
Sunset 06:49 PM
Wind NNE 11 mph18 km/h
Dew Point 54°F12°C
uv Index 3
Barometric Pressure 30.06 in1018 mb
POP 32% *
Humidity 93%
Wed, 23rd
Allerton IL Weather - Wednesday, Sep 23, 2026 - Partly Cloudy
Hi: 69°F 20°C
Lo: 55°F 13°C
Sunrise 06:40 AM
Sunset 06:47 PM
Wind NNE 8 mph12 km/h
Dew Point 55°F13°C
uv Index 5
Barometric Pressure 30.21 in1023 mb
POP 9% *
Humidity 68%
Thu, 24th
Allerton IL Weather - Thursday, Sep 24, 2026 - Overcast
Hi: 69°F 20°C
Lo: 57°F 14°C
Sunrise 06:41 AM
Sunset 06:45 PM
Wind N 9 mph15 km/h
Dew Point 53°F12°C
uv Index 4
Barometric Pressure 30.27 in1025 mb
POP 14% *
Humidity 62%
Fri, 25th
Allerton IL Weather - Friday, Sep 25, 2026 - Overcast
Hi: 70°F 21°C
Lo: 55°F 13°C
Sunrise 06:42 AM
Sunset 06:44 PM
Wind NNE 10 mph17 km/h
Dew Point 54°F12°C
uv Index 5
Barometric Pressure 30.3 in1026 mb
POP 7% *
Humidity 61%
Sat, 26th
Allerton IL Weather - Saturday, Sep 26, 2026 - Overcast
Hi: 69°F 21°C
Lo: 50°F 10°C
Sunrise 06:43 AM
Sunset 06:42 PM
Wind E 6 mph10 km/h
Dew Point 45°F7°C
uv Index 4
Barometric Pressure 30.24 in1024 mb
POP 11% *
Humidity 49%
Sun, 27th
Allerton IL Weather - Sunday, Sep 27, 2026 - Cloudy
Hi: 77°F 25°C
Lo: 54°F 12°C
Sunrise 06:44 AM
Sunset 06:40 PM
Wind SSE 10 mph16 km/h
Dew Point 42°F6°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 2% *
Humidity 37%
Mon, 28th
Allerton IL Weather - Monday, Sep 28, 2026 - Cloudy
Hi: 86°F 30°C
Lo: 67°F 19°C
Sunrise 06:45 AM
Sunset 06:39 PM
Wind SSW 13 mph21 km/h
Dew Point 50°F10°C
uv Index 6
Barometric Pressure 29.88 in1012 mb
POP 2% *
Humidity 37%
Tue, 29th
Allerton IL Weather - Tuesday, Sep 29, 2026 - Sunny
Hi: 85°F 29°C
Lo: 63°F 17°C
Sunrise 06:46 AM
Sunset 06:37 PM
Wind S 6 mph10 km/h
Dew Point 49°F10°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 1% *
Humidity 36%
Wed, 30th
Allerton IL Weather - Wednesday, Sep 30, 2026 - Overcast
Hi: 81°F 27°C
Lo: 63°F 17°C
Sunrise 06:47 AM
Sunset 06:35 PM
Wind E 3 mph5 km/h
Dew Point 51°F10°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 8% *
Humidity 39%
Thu, 1st
Allerton IL Weather - Thursday, Oct 1, 2026 - Overcast
Hi: 68°F 20°C
Lo: 52°F 11°C
Sunrise 06:48 AM
Sunset 06:34 PM
Wind NNW 14 mph22 km/h
Dew Point 55°F13°C
uv Index 4
Barometric Pressure 29.97 in1015 mb
POP 20% *
Humidity 74%
* POP = Probability of Precipitation. Data for 12:00 PM.