Grayslake, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Clear 72°F 22°C Heat Index: 72°F	Observed at: Grayslake, IL	Elevation: 1000 ft | 305 m
	Last Updated: July 16, 10:30 PM Timezone: GMT -5/-4
	Sky Conditions: Clear	Temperature: 72°F | 22°C
	Pressure: 29.21 in | 989 mb	Dewpoint: 67°F | 19°C
	Humidity: 84%	Wind: NE 6 mph | NE 10 kph
	Feels Like: 77°F | 25°C	Visibility: 27.1 mi | 43.6 km
	Lat/Long: 42.3444 | -88.0417	Sunrise: 5:30 AM   Sunset: 8:26 PM

7 Day Graphical Forecast

Valid: 10:36 PM 7/16/2026

Tonight Foggy 70 °F 4% Chance Precipitation Friday Light Drizzle 94 |70 °F 15% Chance Precipitation Saturday Overcast 88 |66 °F 30% Chance Precipitation Sunday Overcast 80 |64 °F 14% Chance Precipitation Monday Overcast 84 |64 °F 43% Chance Precipitation Tuesday Thunderstorm 79 |58 °F 43% Chance Precipitation Wednesday Overcast 73 |50 °F 4% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:36 PM 7/16/2026

10 PM Clear 73 °F 2% Chance Precipitation

11 PM Clear 72 °F 4% Chance Precipitation

12 AM Overcast 72 °F 9% Chance Precipitation

1 AM Overcast 72 °F 5% Chance Precipitation

2 AM Overcast 72 °F 3% Chance Precipitation

3 AM Overcast 71 °F 2% Chance Precipitation

4 AM Overcast 71 °F 3% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Grayslake, IL - (Fahrenheit & Celsius) Valid: 10:36 PM 7/16/2026 Tonight Foggy with a low around 70°F [21°C]. ENE wind to around 9 mph [14 kph], with gusts to near 14 mph [22 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Friday Light Drizzle with a high near 94°F [34°C]. SW wind to around 21 mph [33 kph], with gusts to near 32 mph [52 kph]. Dewpoint near 67°F [19°C] with humidity of 93%. Pressure around 29.21 in [989 mb]. UV Index: 7.45. Chance of precipitation 15% with QPF of 0.02 in [0.4 mm]. Friday Night Light Drizzle with a low around 70°F [21°C]. SW wind to around 21 mph [33 kph], with gusts to near 32 mph [52 kph]. Chance of precipitation 15% with QPF of 0.02 in [0.4 mm]. Saturday Overcast with a high near 88°F [31°C]. WNW wind to around 15 mph [24 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 67°F [19°C] with humidity of 95%. Pressure around 29.21 in [989 mb]. UV Index: 7.2. Chance of precipitation 30% with QPF of 0.00 in [0.1 mm]. Saturday Night Overcast with a low around 66°F [19°C]. WNW wind to around 15 mph [24 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 30% with QPF of 0.00 in [0.1 mm]. Sunday Overcast with a high near 80°F [27°C]. ENE wind to around 9 mph [14 kph], with gusts to near 17 mph [27 kph]. Dewpoint near 67°F [19°C] with humidity of 93%. Pressure around 29.21 in [989 mb]. UV Index: 7.4. Chance of precipitation 14% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 64°F [18°C]. ENE wind to around 9 mph [14 kph], with gusts to near 17 mph [27 kph]. Chance of precipitation 14% with QPF of 0.00 in [0.0 mm]. Monday Overcast with a high near 84°F [29°C]. SSW wind to around 16 mph [26 kph], with gusts to near 33 mph [54 kph]. Dewpoint near 67°F [19°C] with humidity of 94%. Pressure around 29.21 in [989 mb]. UV Index: 6.85. Chance of precipitation 43% with QPF of 0.00 in [0.0 mm]. Monday Night Overcast with a low around 64°F [18°C]. SSW wind to around 16 mph [26 kph], with gusts to near 33 mph [54 kph]. Chance of precipitation 43% with QPF of 0.00 in [0.0 mm]. Tuesday Thunderstorm with a high near 79°F [26°C]. WNW wind to around 20 mph [31 kph], with gusts to near 37 mph [59 kph]. Dewpoint near 67°F [19°C] with humidity of 97%. Pressure around 29.21 in [989 mb]. UV Index: 7.05. Chance of precipitation 43% with QPF of 0.49 in [12.5 mm]. Tuesday Night Thunderstorm with a low around 58°F [14°C]. WNW wind to around 20 mph [31 kph], with gusts to near 37 mph [59 kph]. Chance of precipitation 43% with QPF of 0.49 in [12.5 mm]. Wednesday Overcast with a high near 73°F [23°C]. NNW wind to around 13 mph [21 kph], with gusts to near 26 mph [41 kph]. Dewpoint near 67°F [19°C] with humidity of 79%. Pressure around 29.21 in [989 mb]. UV Index: 7.2. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Wednesday Night Overcast with a low around 50°F [10°C]. NNW wind to around 13 mph [21 kph], with gusts to near 26 mph [41 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Grayslake, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.4 mm | 0.02 in

Friday Night: 0.4 mm | 0.02 in

Saturday: 0.1 mm | 0.00 in

Saturday Night: 0.1 mm | 0.00 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 12.5 mm | 0.49 in

Tuesday Night: 12.5 mm | 0.49 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Grayslake, IL

Tonight: ENE @ 14 kph | 9 mph

Friday: SW @ 33 kph | 21 mph

Friday Night: SW @ 33 kph | 21 mph

Saturday: WNW @ 24 kph | 15 mph

Saturday Night: WNW @ 24 kph | 15 mph

Sunday: ENE @ 14 kph | 9 mph

Sunday Night: ENE @ 14 kph | 9 mph

Monday: SSW @ 26 kph | 16 mph

Monday Night: SSW @ 26 kph | 16 mph

Tuesday: WNW @ 31 kph | 20 mph

Tuesday Night: WNW @ 31 kph | 20 mph

Wednesday: NNW @ 21 kph | 13 mph

Wednesday Night: NNW @ 21 kph | 13 mph

7 Day and Night - Maximum Humidity Forecast for Grayslake, IL

Tonight: 88 %

Friday: 93 %

Friday Night: 93 %

Saturday: 95 %

Saturday Night: 95 %

Sunday: 93 %

Sunday Night: 93 %

Monday: 94 %

Monday Night: 94 %

Tuesday: 97 %

Tuesday Night: 97 %

Wednesday: 79 %

Wednesday Night: 79 %

7 Day and Night - Snowfall Totals Forecast for Grayslake, IL

Tonight: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

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