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Current weather in Grayslake is clear sky.

Where can I find the hourly weather forecast for Grayslake?

This page shows hourly weather forecast for Grayslake, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Grayslake updated regularly?

Weather data for Grayslake is updated regularly with the latest available observations and forecasts.

Now · 8:12 AM

Grayslake Weather & Hourly Forecast

United States · Illinois · 60030

66°F

Sunny

Feels like: 67°F

💧 Humidity 93% 🌡 Pressure 30.15 inHg 💨 Wind 4 mph 👁 Visibility 6.2 mi ☁ Clouds 0% ☀️ UV index 4.0 · Moderate 🌅 Sunrise 6:13 AM 🌇 Sunset 7:33 PM

Hourly Forecast for Grayslake

Today

9:00 AM

Sunny

66° 💧 None 💨 4 mph H 93%30.15 inHg

12:00 PM

Sunny

75° 💧 None 💨 8 mph H 73%30.12 inHg

3:00 PM

Sunny

82° 💧 None 💨 9 mph H 45%30.09 inHg

6:00 PM

Sunny

81° 💧 None 💨 7 mph H 63%30.09 inHg

9:00 PM

Mostly cloudy night

69° 💧 None 💨 7 mph H 82%30.12 inHg

Tomorrow

12:00 AM

Mostly cloudy night

66° 💧 None 💨 6 mph H 87%30.09 inHg

3:00 AM

Overcast night

64° 💧 None 💨 6 mph H 87%30.09 inHg

6:00 AM

Mostly cloudy night

63° 💧 None 💨 7 mph H 92%30.09 inHg

9:00 AM

Overcast

71° 💧 None 💨 8 mph H 82%30.12 inHg

12:00 PM

Overcast

75° 💧 None 💨 10 mph H 72%30.12 inHg

3:00 PM

Overcast

76° 💧 None 💨 5 mph H 76%30.03 inHg

6:00 PM

Overcast

77° 💧 None 💨 7 mph H 80%30.00 inHg

9:00 PM

Overcast night

71° 💧 None 💨 9 mph H 77%30.00 inHg

Sunday

12:00 AM

Overcast night

72° 💧 None 💨 12 mph H 78%29.94 inHg

3:00 AM

Light rain

69° 💧 0.02 in 💨 11 mph H 80%29.94 inHg

6:00 AM

Light rain

66° 💧 0.04 in 💨 12 mph H 84%29.91 inHg

Today

9:00 AM

Sunny

66° 💧 None 💨 4 mph H 93%30.15 inHg

10:00 AM

Sunny

68° 💧 None 💨 5 mph H 88%30.15 inHg

11:00 AM

Sunny

71° 💧 None 💨 6 mph H 81%30.12 inHg

12:00 PM

Sunny

75° 💧 None 💨 8 mph H 73%30.12 inHg

1:00 PM

Sunny

80° 💧 None 💨 7 mph H 47%30.12 inHg

2:00 PM

Sunny

81° 💧 None 💨 8 mph H 45%30.09 inHg

3:00 PM

Sunny

82° 💧 None 💨 9 mph H 45%30.09 inHg

4:00 PM

Sunny

84° 💧 None 💨 9 mph H 48%30.09 inHg

5:00 PM

Sunny

84° 💧 None 💨 8 mph H 55%30.06 inHg

6:00 PM

Sunny

81° 💧 None 💨 7 mph H 63%30.09 inHg

7:00 PM

Sunny

76° 💧 None 💨 6 mph H 73%30.06 inHg

8:00 PM

Partly cloudy night

71° 💧 None 💨 6 mph H 79%30.09 inHg

9:00 PM

Mostly cloudy night

69° 💧 None 💨 7 mph H 82%30.12 inHg

10:00 PM

Mostly cloudy night

69° 💧 None 💨 6 mph H 84%30.12 inHg

11:00 PM

Mostly cloudy night

67° 💧 None 💨 6 mph H 86%30.09 inHg

Tomorrow

12:00 AM

Mostly cloudy night

66° 💧 None 💨 6 mph H 87%30.09 inHg

1:00 AM

Mostly cloudy night

67° 💧 None 💨 6 mph H 86%30.09 inHg

2:00 AM

Overcast night

65° 💧 None 💨 6 mph H 87%30.09 inHg

3:00 AM

Overcast night

64° 💧 None 💨 6 mph H 87%30.09 inHg

4:00 AM

Overcast night

63° 💧 None 💨 7 mph H 90%30.09 inHg

5:00 AM

Mostly cloudy night

63° 💧 None 💨 7 mph H 92%30.12 inHg

6:00 AM

Mostly cloudy night

63° 💧 None 💨 7 mph H 92%30.09 inHg

7:00 AM

Overcast

65° 💧 None 💨 6 mph H 89%30.12 inHg

8:00 AM

Overcast

68° 💧 None 💨 8 mph H 84%30.12 inHg

9:00 AM

Overcast

71° 💧 None 💨 8 mph H 82%30.12 inHg

10:00 AM

Overcast

72° 💧 None 💨 9 mph H 79%30.12 inHg

11:00 AM

Overcast

74° 💧 None 💨 9 mph H 75%30.12 inHg

12:00 PM

Overcast

75° 💧 None 💨 10 mph H 72%30.12 inHg

1:00 PM

Overcast

77° 💧 None 💨 11 mph H 69%30.09 inHg

2:00 PM

Overcast

78° 💧 None 💨 10 mph H 70%30.03 inHg

3:00 PM

Overcast

76° 💧 None 💨 5 mph H 76%30.03 inHg

4:00 PM

Overcast

77° 💧 None 💨 4 mph H 78%30.03 inHg

5:00 PM

Overcast

78° 💧 None 💨 5 mph H 80%30.03 inHg

6:00 PM

Overcast

77° 💧 None 💨 7 mph H 80%30.00 inHg

7:00 PM

Overcast

75° 💧 None 💨 10 mph H 78%30.00 inHg

8:00 PM

Overcast night

72° 💧 None 💨 9 mph H 75%30.00 inHg

9:00 PM

Overcast night

71° 💧 None 💨 9 mph H 77%30.00 inHg

10:00 PM

Overcast night

72° 💧 None 💨 11 mph H 82%29.97 inHg

11:00 PM

Overcast night

72° 💧 None 💨 12 mph H 82%29.97 inHg

Sunday

12:00 AM

Overcast night

72° 💧 None 💨 12 mph H 78%29.94 inHg

1:00 AM

Overcast night

74° 💧 None 💨 13 mph H 76%29.94 inHg

2:00 AM

Overcast night

70° 💧 None 💨 12 mph H 75%29.94 inHg

3:00 AM

Light rain

69° 💧 0.00 in 💨 11 mph H 80%29.94 inHg

4:00 AM

Light rain

68° 💧 0.01 in 💨 11 mph H 81%29.94 inHg

5:00 AM

Light rain

67° 💧 0.01 in 💨 12 mph H 82%29.91 inHg

6:00 AM

Light rain

66° 💧 0.01 in 💨 12 mph H 84%29.91 inHg

7:00 AM

Light rain

67° 💧 0.01 in 💨 10 mph H 83%29.94 inHg

8:00 AM

Light rain

68° 💧 0.01 in 💨 10 mph H 85%29.94 inHg

9:00 AM

Light rain

69° 💧 0.03 in 💨 11 mph H 85%29.94 inHg

10:00 AM

Light rain

71° 💧 0.01 in 💨 12 mph H 80%29.94 inHg

11:00 AM

Overcast

76° 💧 None 💨 14 mph H 64%29.94 inHg

12:00 PM

Overcast

79° 💧 None 💨 15 mph H 60%29.91 inHg

1:00 PM

Light rain

80° 💧 0.00 in 💨 15 mph H 62%29.91 inHg

2:00 PM

Overcast

83° 💧 None 💨 14 mph H 58%29.91 inHg

3:00 PM

Overcast

84° 💧 None 💨 13 mph H 57%29.88 inHg

4:00 PM

Overcast

80° 💧 None 💨 7 mph H 68%29.88 inHg

5:00 PM

Overcast

82° 💧 None 💨 10 mph H 66%29.88 inHg

6:00 PM

Overcast

81° 💧 None 💨 9 mph H 70%29.85 inHg

7:00 PM

Overcast

78° 💧 None 💨 6 mph H 74%29.85 inHg

8:00 PM

Mostly clear night

76° 💧 None 💨 5 mph H 75%29.85 inHg

9:00 PM

Partly cloudy night

74° 💧 None 💨 4 mph H 77%29.88 inHg

10:00 PM

Partly cloudy night

74° 💧 None 💨 4 mph H 79%29.88 inHg

11:00 PM

Mostly cloudy night

73° 💧 None 💨 5 mph H 81%29.85 inHg

Monday

12:00 AM

Mostly cloudy night

71° 💧 None 💨 4 mph H 84%29.85 inHg

1:00 AM

Partly cloudy night

70° 💧 None 💨 5 mph H 86%29.88 inHg

2:00 AM

Light rain

69° 💧 0.02 in 💨 8 mph H 88%29.85 inHg

3:00 AM

Light rain

67° 💧 0.03 in 💨 4 mph H 93%29.88 inHg

4:00 AM

Light rain

68° 💧 0.02 in 💨 4 mph H 92%29.88 inHg

5:00 AM

Light rain

68° 💧 0.02 in 💨 5 mph H 93%29.85 inHg

6:00 AM

Overcast night

68° 💧 None 💨 6 mph H 91%29.85 inHg

7:00 AM

Overcast

68° 💧 None 💨 7 mph H 91%29.85 inHg

8:00 AM

Overcast

69° 💧 None 💨 9 mph H 87%29.85 inHg

9:00 AM

Overcast

74° 💧 None 💨 7 mph H 78%29.85 inHg

10:00 AM

Overcast

76° 💧 None 💨 9 mph H 74%29.85 inHg

11:00 AM

Overcast

82° 💧 None 💨 13 mph H 62%29.85 inHg

12:00 PM

Overcast

84° 💧 None 💨 13 mph H 58%29.85 inHg

1:00 PM

Overcast

85° 💧 None 💨 12 mph H 58%29.85 inHg

2:00 PM

Overcast

87° 💧 None 💨 13 mph H 58%29.85 inHg

3:00 PM

Overcast

86° 💧 None 💨 12 mph H 65%29.83 inHg

4:00 PM

Overcast

88° 💧 None 💨 11 mph H 63%29.85 inHg

5:00 PM

Overcast

87° 💧 None 💨 11 mph H 68%29.83 inHg

6:00 PM

Overcast

84° 💧 None 💨 10 mph H 74%29.83 inHg

7:00 PM

Overcast

81° 💧 None 💨 7 mph H 81%29.83 inHg

8:00 PM

Overcast night

79° 💧 None 💨 5 mph H 85%29.83 inHg

9:00 PM

Overcast night

78° 💧 None 💨 7 mph H 83%29.83 inHg

10:00 PM

Overcast night

78° 💧 None 💨 4 mph H 83%29.85 inHg

11:00 PM

Overcast night

77° 💧 None 💨 4 mph H 86%29.85 inHg

Tuesday

12:00 AM

Overcast night

77° 💧 None 💨 6 mph H 87%29.85 inHg

1:00 AM

Overcast night

76° 💧 None 💨 7 mph H 82%29.85 inHg

2:00 AM

Partly cloudy night

75° 💧 None 💨 7 mph H 77%29.85 inHg

3:00 AM

Partly cloudy night

74° 💧 None 💨 7 mph H 72%29.85 inHg

4:00 AM

Partly cloudy night

73° 💧 None 💨 7 mph H 68%29.85 inHg

5:00 AM

Partly cloudy night

74° 💧 None 💨 8 mph H 63%29.85 inHg

6:00 AM

Partly cloudy night

75° 💧 None 💨 8 mph H 62%29.85 inHg

7:00 AM

Partly cloudy

75° 💧 None 💨 7 mph H 64%29.85 inHg

8:00 AM

Sunny

76° 💧 None 💨 7 mph H 66%29.88 inHg

In Grayslake and, more broadly, across the state of Illinois: The morning begins with clear skies and mild temperatures around 61 degrees. As the day progresses, expect the weather to warm up to a high near 83 degrees. Winds will be light, coming from the northeast at around 7 mph, with occasional gusts reaching 9 mph. No precipitation is expected throughout the day, providing a dry and pleasant atmosphere. Overall, it looks like a warm and sunny day with gentle breezes, ideal for outdoor activities.

15-Day Weather Outlook for Grayslake

TomorrowTomorrow

Overcast 78°/63° 💧 None 💨 12 mph

Sunday, Aug 30Sun Aug 30

Light rain 84°/66° 💧 0.09 in 💨 15 mph

Monday, Aug 31Mon Aug 31

Light rain 88°/67° 💧 0.08 in 💨 12 mph

Tuesday, Sep 1Tue Sep 1

Mostly cloudy 89°/73° 💧 None 💨 12 mph

Wednesday, Sep 2Wed Sep 2

Mostly sunny 90°/77° 💧 None 💨 16 mph

Thursday, Sep 3Thu Sep 3

Sunny 93°/74° 💧 None 💨 9 mph

Friday, Sep 4Fri Sep 4

Light rain 94°/74° 💧 0.01 in 💨 13 mph

Saturday, Sep 5Sat Sep 5

Light rain 94°/74° 💧 0.04 in 💨 7 mph

Sunday, Sep 6Sun Sep 6

Moderate rain 75°/67° 💧 0.47 in 💨 11 mph

Monday, Sep 7Mon Sep 7

Sunny 76°/62° 💧 None 💨 11 mph

Tuesday, Sep 8Tue Sep 8

Overcast 79°/62° 💧 None 💨 9 mph

Wednesday, Sep 9Wed Sep 9

Sunny 74°/58° 💧 None 💨 8 mph

Thursday, Sep 10Thu Sep 10

Mostly cloudy 75°/55° 💧 None 💨 7 mph

Friday, Sep 11Fri Sep 11

Light rain 75°/56° 💧 0.02 in 💨 11 mph

Saturday, Sep 12Sat Sep 12

Light rain 75°/64° 💧 0.07 in 💨 11 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Grayslake

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Grayslake

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 9:00 AM

PM2.5 Fine particles Good 4,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 4,8µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Good 5,9µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 4,0µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Grayslake

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 7,0High 😊Good

Tomorrow UV 5,0Moderate 😐Moderate

Sunday UV 6,0High 😐Moderate

Monday UV 7,0High 😐Moderate

Tuesday UV 8,0Very high 🙂Fair

Wednesday UV 8,0Very high —Unavailable

Thursday UV 7,0High —Unavailable

Hourly UV index today

9:00 AMUV 5,0 10:00 AMUV 5,0 11:00 AMUV 6,0 12:00 PMUV 6,0 1:00 PMUV 7,0 2:00 PMUV 7,0 3:00 PMUV 7,0 4:00 PMUV 7,0 5:00 PMUV 7,0 6:00 PMUV 6,0 7:00 PMUV 6,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Grayslake

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.45 Population: 20,929

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for Grayslake were last refreshed today at 8:12 AM. The current forecast period extends through 30/08/2026 at 6:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.