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Grayslake IL Weather - Clear - 73°F
Clear
73°F
Updated 11:49 am
Feels Like 74°F
Humidity 61%
Wind SE 8 mph
Barometer  30.05 in
Dew Point 59°F
Grayslake IL Weather - Clear - 23°C
Clear
23°C
Updated 11:49 am
Feels Like 23°C
Humidity 61%
Wind SE 13 km/h
Barometer  101.7 kPa
Dew Point 15°C
Grayslake, IL Weather and Current Conditionsgrayslake il weather forecast

Grayslake, IL Weather Forecast

Grayslake Illinois WeatherGrayslake, Illinois Weather Weather Forecast
Here is the API 14 day weather forecast for Grayslake, Illinois. Note: The 7-day weather forecast for Grayslake, IL is the most reliable and accurate weather forecast. This template should only be used as a probable scenario. Forecasting weather beyond the next 7 days is a challenge.
Grayslake, IL Weather Forecast Dated: 1149 AM Fri Sep 11 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Friday, September 11, 2026

Mid-Morning
Grayslake Weather - 2026-09-11 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-11 - Afternoon - Sunny
85°F 29°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-11 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery near 85°F 29°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling.

Saturday, September 12, 2026

Mid-Morning
Grayslake Weather - 2026-09-12 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-12 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-12 - Evening - Sunny
77°F 25°C
Sunny
Balmy with temperatures reaching 81°F 27°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the SSW to the SW at 8 mph 12 km/h.

Sunday, September 13, 2026

Mid-Morning
Grayslake Weather - 2026-09-13 - Morning - Overcast
67°F 19°C
Overcast
Mid-Afternoon
Grayslake Weather - 2026-09-13 - Afternoon - Overcast
69°F 21°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-13 - Evening - Scattered Showers
64°F 18°C
Scattered Showers
Enjoyable around 69°F 21°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds blowing from the NE at 6 mph 10 km/h.

Monday, September 14, 2026

Mid-Morning
Grayslake Weather - 2026-09-14 - Morning - Overcast
61°F 16°C
Overcast
Mid-Afternoon
Grayslake Weather - 2026-09-14 - Afternoon - Overcast
63°F 17°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-14 - Evening - Overcast
70°F 21°C
Overcast
Cool with a high near 63°F 17°C, overcast through the afternoon, turning cloudy this evening, with increasing humidity and barometric pressure falling. Winds moving from the E to the SE at 11 mph 17 km/h. Gusts up to 29 mph 47 km/h.

Tuesday, September 15, 2026

Mid-Morning
Grayslake Weather - 2026-09-15 - Morning - Scattered Showers
72°F 22°C
Scattered Showers
Mid-Afternoon
Grayslake Weather - 2026-09-15 - Afternoon - Scattered Showers
78°F 26°C
Scattered Showers
Early-Evening
Grayslake Weather - 2026-09-15 - Evening - Overcast
72°F 22°C
Overcast
Mild with a high of 78°F 26°C, scattered downpours possible, with steady humidity and steady pressure. Winds easing from WSW 11 mph 17 km/h to N 3 mph 6 km/h.

Wednesday, September 16, 2026

Mid-Morning
Grayslake Weather - 2026-09-16 - Morning - Light Showers
64°F 18°C
Light Showers
Mid-Afternoon
Grayslake Weather - 2026-09-16 - Afternoon - Overcast
63°F 17°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-16 - Evening - Light Showers
61°F 16°C
Light Showers
Mildly cool near 63°F 17°C, passing showers during morning and evening, with a dry break midday, with steady humidity and steady pressure. Winds shifting from the NE to the NNE at 9 mph 14 km/h. Gusts up to 20 mph 33 km/h.

Thursday, September 17, 2026

Mid-Morning
Grayslake Weather - 2026-09-17 - Morning - Overcast
57°F 14°C
Overcast
Mid-Afternoon
Grayslake Weather - 2026-09-17 - Afternoon - Overcast
65°F 18°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-17 - Evening - Sunny
60°F 15°C
Sunny
Comfortable at 65°F 18°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds turning from the N to the NNW at 8 mph 13 km/h.

Friday, September 18, 2026

Mid-Morning
Grayslake Weather - 2026-09-18 - Morning - Sunny
57°F 14°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-18 - Afternoon - Sunny
66°F 19°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-18 - Evening - Sunny
62°F 17°C
Sunny
Cool with a high near 66°F 19°C, sunny throughout the day, with steady humidity and barometric pressure falling.

Saturday, September 19, 2026

Mid-Morning
Grayslake Weather - 2026-09-19 - Morning - Cloudy
58°F 14°C
Cloudy
Mid-Afternoon
Grayslake Weather - 2026-09-19 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-19 - Evening - Sunny
66°F 19°C
Sunny
Mild temperatures up to 70°F 21°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.

Sunday, September 20, 2026

Mid-Morning
Grayslake Weather - 2026-09-20 - Morning - Sunny
63°F 17°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-20 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-20 - Evening - Sunny
69°F 20°C
Sunny
Mild with a high of 72°F 22°C, sunny throughout the day, with steady humidity and steady pressure.

Monday, September 21, 2026

Mid-Morning
Grayslake Weather - 2026-09-21 - Morning - Sunny
66°F 19°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-21 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-21 - Evening - Sunny
68°F 20°C
Sunny
Pleasant near 72°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the SSE to the ESE at 7 mph 11 km/h.

Tuesday, September 22, 2026

Mid-Morning
Grayslake Weather - 2026-09-22 - Morning - Sunny
65°F 18°C
Sunny
Mid-Afternoon
Grayslake Weather - 2026-09-22 - Afternoon - Overcast
74°F 24°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-22 - Evening - Overcast
70°F 22°C
Overcast
Comfortable with temperatures reaching 74°F 24°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.

Wednesday, September 23, 2026

Mid-Morning
Grayslake Weather - 2026-09-23 - Morning - Overcast
69°F 20°C
Overcast
Mid-Afternoon
Grayslake Weather - 2026-09-23 - Afternoon - Sunny
77°F 25°C
Sunny
Early-Evening
Grayslake Weather - 2026-09-23 - Evening - Sunny
73°F 23°C
Sunny
Enjoyable around 77°F 25°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure.

Thursday, September 24, 2026

Mid-Morning
Grayslake Weather - 2026-09-24 - Morning - Overcast
70°F 21°C
Overcast
Mid-Afternoon
Grayslake Weather - 2026-09-24 - Afternoon - Overcast
70°F 21°C
Overcast
Early-Evening
Grayslake Weather - 2026-09-24 - Evening - Overcast
66°F 19°C
Overcast
Mild temperatures up to 70°F 21°C, overcast throughout the day, with increasing humidity and steady pressure.

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Weather by the Numbers

Fri, 11th
Grayslake IL Weather - Friday, Sep 11, 2026 - Sunny
Hi: 86°F 30°C
Lo: 57°F 14°C
Sunrise 06:28 AM
Sunset 07:09 PM
Wind SSE 6 mph10 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 1% *
Humidity 38%
Sat, 12th
Grayslake IL Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 81°F 27°C
Lo: 66°F 19°C
Sunrise 06:29 AM
Sunset 07:07 PM
Wind SW 11 mph18 km/h
Dew Point 63°F17°C
uv Index 6
Barometric Pressure 29.88 in1012 mb
POP 14% *
Humidity 61%
Sun, 13th
Grayslake IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 72°F 22°C
Lo: 61°F 16°C
Sunrise 06:30 AM
Sunset 07:05 PM
Wind NNE 9 mph14 km/h
Dew Point 56°F13°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 14% *
Humidity 58%
Mon, 14th
Grayslake IL Weather - Monday, Sep 14, 2026 - Light Rain Shower
Hi: 74°F 23°C
Lo: 60°F 16°C
Sunrise 06:31 AM
Sunset 07:03 PM
Wind ESE 9 mph14 km/h
Dew Point 53°F12°C
uv Index 1
Barometric Pressure 30.15 in1021 mb
POP 37% *
Humidity 70%
Tue, 15th
Grayslake IL Weather - Tuesday, Sep 15, 2026 - Light Rain Shower
Hi: 79°F 26°C
Lo: 67°F 20°C
Sunrise 06:32 AM
Sunset 07:02 PM
Wind SW 10 mph16 km/h
Dew Point 65°F19°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 52% *
Humidity 76%
Wed, 16th
Grayslake IL Weather - Wednesday, Sep 16, 2026 - Patchy Rain Nearby
Hi: 67°F 20°C
Lo: 60°F 16°C
Sunrise 06:33 AM
Sunset 07:00 PM
Wind NNE 8 mph13 km/h
Dew Point 61°F16°C
uv Index 4
Barometric Pressure 30.18 in1022 mb
POP 29% *
Humidity 89%
Thu, 17th
Grayslake IL Weather - Thursday, Sep 17, 2026 - Overcast
Hi: 65°F 18°C
Lo: 55°F 13°C
Sunrise 06:34 AM
Sunset 06:58 PM
Wind ESE 9 mph15 km/h
Dew Point 50°F10°C
uv Index 4
Barometric Pressure 30.27 in1025 mb
POP 16% *
Humidity 65%
Fri, 18th
Grayslake IL Weather - Friday, Sep 18, 2026 - Sunny
Hi: 66°F 19°C
Lo: 52°F 11°C
Sunrise 06:35 AM
Sunset 06:56 PM
Wind NW 3 mph4 km/h
Dew Point 46°F8°C
uv Index 5
Barometric Pressure 30.27 in1025 mb
POP 2% *
Humidity 52%
Sat, 19th
Grayslake IL Weather - Saturday, Sep 19, 2026 - Partly Cloudy
Hi: 71°F 22°C
Lo: 53°F 12°C
Sunrise 06:36 AM
Sunset 06:54 PM
Wind W 4 mph6 km/h
Dew Point 46°F8°C
uv Index 5
Barometric Pressure 30.18 in1022 mb
POP 2% *
Humidity 48%
Sun, 20th
Grayslake IL Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 72°F 22°C
Lo: 58°F 14°C
Sunrise 06:37 AM
Sunset 06:53 PM
Wind SW 5 mph8 km/h
Dew Point 49°F10°C
uv Index 6
Barometric Pressure 30.12 in1020 mb
POP 2% *
Humidity 49%
Mon, 21st
Grayslake IL Weather - Monday, Sep 21, 2026 - Sunny
Hi: 73°F 23°C
Lo: 61°F 16°C
Sunrise 06:38 AM
Sunset 06:51 PM
Wind ESE 7 mph12 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 30.09 in1019 mb
POP 3% *
Humidity 55%
Tue, 22nd
Grayslake IL Weather - Tuesday, Sep 22, 2026 - Overcast
Hi: 75°F 24°C
Lo: 61°F 16°C
Sunrise 06:39 AM
Sunset 06:49 PM
Wind SSE 7 mph11 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 29.94 in1014 mb
POP 11% *
Humidity 47%
Wed, 23rd
Grayslake IL Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 77°F 25°C
Lo: 64°F 18°C
Sunrise 06:40 AM
Sunset 06:47 PM
Wind SW 3 mph5 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 29.97 in1015 mb
POP 2% *
Humidity 51%
Thu, 24th
Grayslake IL Weather - Thursday, Sep 24, 2026 - Overcast
Hi: 71°F 22°C
Lo: 65°F 18°C
Sunrise 06:42 AM
Sunset 06:46 PM
Wind ESE 7 mph12 km/h
Dew Point 56°F13°C
uv Index 5
Barometric Pressure 30.18 in1022 mb
POP 15% *
Humidity 61%
* POP = Probability of Precipitation. Data for 12:00 PM.