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Current weather in Summit is overcast clouds.

Where can I find the hourly weather forecast for Summit?

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

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

Now · 1:55 AM

Summit Weather & Hourly Forecast

United States · Illinois · 60501

67°F

Overcast night

Feels like: 67°F

💧 Humidity 81% 🌡 Pressure 30.09 inHg 💨 Wind 4 mph 👁 Visibility 6.2 mi ☁ Clouds 100% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:14 AM 🌇 Sunset 7:30 PM

Hourly Forecast for Summit

Today

2:00 AM

Overcast night

67° 💧 None 💨 4 mph H 81%30.09 inHg

5:00 AM

Overcast night

65° 💧 None 💨 4 mph H 81%30.12 inHg

8:00 AM

Overcast

68° 💧 None 💨 5 mph H 69%30.15 inHg

11:00 AM

Overcast

76° 💧 None 💨 7 mph H 57%30.15 inHg

2:00 PM

Overcast

81° 💧 None 💨 9 mph H 52%30.06 inHg

5:00 PM

Overcast

79° 💧 None 💨 8 mph H 61%30.03 inHg

8:00 PM

Overcast night

74° 💧 None 💨 8 mph H 73%30.00 inHg

11:00 PM

Overcast night

71° 💧 None 💨 6 mph H 74%30.03 inHg

Tomorrow

2:00 AM

Light rain

69° 💧 0.02 in 💨 8 mph H 82%30.00 inHg

5:00 AM

Light rain

68° 💧 0.01 in 💨 6 mph H 86%30.00 inHg

8:00 AM

Overcast

72° 💧 0.01 in 💨 7 mph H 77%30.03 inHg

11:00 AM

Overcast

80° 💧 None 💨 10 mph H 50%29.97 inHg

2:00 PM

Overcast

86° 💧 None 💨 12 mph H 43%29.94 inHg

5:00 PM

Overcast

85° 💧 None 💨 11 mph H 50%29.91 inHg

8:00 PM

Mostly cloudy night

81° 💧 None 💨 6 mph H 66%29.91 inHg

11:00 PM

Overcast night

78° 💧 None 💨 4 mph H 65%29.91 inHg

Today

2:00 AM

Overcast night

67° 💧 None 💨 4 mph H 81%30.09 inHg

3:00 AM

Overcast night

66° 💧 None 💨 4 mph H 80%30.09 inHg

4:00 AM

Overcast night

66° 💧 None 💨 3 mph H 80%30.09 inHg

5:00 AM

Overcast night

65° 💧 None 💨 4 mph H 81%30.12 inHg

6:00 AM

Overcast night

64° 💧 None 💨 3 mph H 80%30.12 inHg

7:00 AM

Mostly cloudy

65° 💧 None 💨 4 mph H 75%30.15 inHg

8:00 AM

Overcast

68° 💧 None 💨 5 mph H 69%30.15 inHg

9:00 AM

Overcast

73° 💧 None 💨 5 mph H 61%30.15 inHg

10:00 AM

Overcast

75° 💧 None 💨 6 mph H 58%30.15 inHg

11:00 AM

Overcast

76° 💧 None 💨 7 mph H 57%30.15 inHg

12:00 PM

Overcast

78° 💧 None 💨 7 mph H 62%30.12 inHg

1:00 PM

Overcast

79° 💧 None 💨 7 mph H 57%30.09 inHg

2:00 PM

Overcast

81° 💧 None 💨 9 mph H 52%30.06 inHg

3:00 PM

Overcast

82° 💧 None 💨 10 mph H 48%30.00 inHg

4:00 PM

Overcast

80° 💧 None 💨 11 mph H 48%30.00 inHg

5:00 PM

Overcast

79° 💧 None 💨 8 mph H 61%30.03 inHg

6:00 PM

Overcast

78° 💧 None 💨 8 mph H 64%30.03 inHg

7:00 PM

Overcast

77° 💧 None 💨 8 mph H 68%30.00 inHg

8:00 PM

Overcast night

74° 💧 None 💨 8 mph H 73%30.00 inHg

9:00 PM

Overcast night

72° 💧 None 💨 7 mph H 72%30.03 inHg

10:00 PM

Mostly cloudy night

72° 💧 None 💨 7 mph H 73%30.03 inHg

11:00 PM

Overcast night

71° 💧 None 💨 6 mph H 74%30.03 inHg

Tomorrow

12:00 AM

Overcast night

70° 💧 None 💨 7 mph H 75%30.03 inHg

1:00 AM

Overcast night

70° 💧 None 💨 8 mph H 77%30.00 inHg

2:00 AM

Light rain

69° 💧 0.01 in 💨 8 mph H 82%30.00 inHg

3:00 AM

Light rain

69° 💧 0.01 in 💨 8 mph H 82%30.00 inHg

4:00 AM

Light rain

68° 💧 0.01 in 💨 7 mph H 86%30.00 inHg

5:00 AM

Light rain

68° 💧 0.01 in 💨 6 mph H 86%30.00 inHg

6:00 AM

Overcast night

68° 💧 None 💨 6 mph H 84%30.00 inHg

7:00 AM

Overcast

69° 💧 None 💨 5 mph H 81%30.00 inHg

8:00 AM

Overcast

72° 💧 None 💨 7 mph H 77%30.03 inHg

9:00 AM

Light rain

74° 💧 0.01 in 💨 7 mph H 75%30.00 inHg

10:00 AM

Overcast

77° 💧 None 💨 8 mph H 65%30.00 inHg

11:00 AM

Overcast

80° 💧 None 💨 10 mph H 50%29.97 inHg

12:00 PM

Overcast

84° 💧 None 💨 12 mph H 45%29.97 inHg

1:00 PM

Overcast

85° 💧 None 💨 12 mph H 42%29.94 inHg

2:00 PM

Overcast

86° 💧 None 💨 12 mph H 43%29.94 inHg

3:00 PM

Overcast

86° 💧 None 💨 13 mph H 43%29.91 inHg

4:00 PM

Overcast

86° 💧 None 💨 12 mph H 47%29.91 inHg

5:00 PM

Overcast

85° 💧 None 💨 11 mph H 50%29.91 inHg

6:00 PM

Overcast

84° 💧 None 💨 10 mph H 53%29.88 inHg

7:00 PM

Mostly cloudy

83° 💧 None 💨 8 mph H 61%29.88 inHg

8:00 PM

Mostly cloudy night

81° 💧 None 💨 6 mph H 66%29.91 inHg

9:00 PM

Mostly cloudy night

80° 💧 None 💨 5 mph H 65%29.91 inHg

10:00 PM

Mostly cloudy night

78° 💧 None 💨 3 mph H 68%29.94 inHg

11:00 PM

Overcast night

78° 💧 None 💨 4 mph H 65%29.91 inHg

Monday

12:00 AM

Overcast night

78° 💧 None 💨 5 mph H 62%29.91 inHg

1:00 AM

Mostly cloudy night

77° 💧 None 💨 6 mph H 60%29.91 inHg

2:00 AM

Light rain

75° 💧 0.01 in 💨 6 mph H 65%29.91 inHg

3:00 AM

Light rain

72° 💧 0.01 in 💨 5 mph H 77%29.91 inHg

4:00 AM

Overcast night

72° 💧 None 💨 5 mph H 74%29.91 inHg

5:00 AM

Overcast night

72° 💧 None 💨 6 mph H 69%29.91 inHg

6:00 AM

Overcast night

73° 💧 None 💨 5 mph H 63%29.91 inHg

7:00 AM

Overcast

74° 💧 None 💨 5 mph H 60%29.91 inHg

8:00 AM

Overcast

75° 💧 None 💨 6 mph H 53%29.91 inHg

9:00 AM

Overcast

77° 💧 None 💨 9 mph H 49%29.94 inHg

10:00 AM

Overcast

81° 💧 None 💨 10 mph H 43%29.91 inHg

11:00 AM

Overcast

79° 💧 None 💨 10 mph H 47%29.94 inHg

12:00 PM

Overcast

86° 💧 None 💨 11 mph H 40%29.91 inHg

1:00 PM

Overcast

83° 💧 None 💨 10 mph H 53%29.91 inHg

2:00 PM

Overcast

89° 💧 None 💨 12 mph H 48%29.88 inHg

3:00 PM

Overcast

92° 💧 None 💨 13 mph H 46%29.85 inHg

4:00 PM

Overcast

91° 💧 None 💨 13 mph H 49%29.85 inHg

5:00 PM

Overcast

91° 💧 None 💨 11 mph H 51%29.85 inHg

6:00 PM

Overcast

89° 💧 None 💨 7 mph H 57%29.85 inHg

7:00 PM

Overcast

86° 💧 None 💨 6 mph H 65%29.85 inHg

8:00 PM

Partly cloudy night

83° 💧 None 💨 5 mph H 71%29.85 inHg

9:00 PM

Mostly cloudy night

82° 💧 None 💨 5 mph H 73%29.85 inHg

10:00 PM

Mostly cloudy night

81° 💧 None 💨 6 mph H 72%29.85 inHg

11:00 PM

Overcast night

81° 💧 None 💨 8 mph H 65%29.85 inHg

Tuesday

12:00 AM

Light rain

79° 💧 0.01 in 💨 9 mph H 66%29.85 inHg

1:00 AM

Light rain

77° 💧 0.01 in 💨 8 mph H 69%29.85 inHg

2:00 AM

Light rain

74° 💧 0.01 in 💨 7 mph H 77%29.88 inHg

3:00 AM

Overcast night

75° 💧 None 💨 6 mph H 74%29.88 inHg

4:00 AM

Overcast night

75° 💧 None 💨 6 mph H 70%29.88 inHg

5:00 AM

Overcast night

75° 💧 None 💨 7 mph H 67%29.88 inHg

6:00 AM

Overcast night

75° 💧 None 💨 7 mph H 62%29.88 inHg

7:00 AM

Overcast

77° 💧 None 💨 7 mph H 58%29.88 inHg

8:00 AM

Overcast

78° 💧 None 💨 7 mph H 55%29.91 inHg

9:00 AM

Overcast

79° 💧 None 💨 8 mph H 54%29.91 inHg

10:00 AM

Overcast

77° 💧 None 💨 6 mph H 59%29.91 inHg

11:00 AM

Overcast

88° 💧 None 💨 10 mph H 42%29.91 inHg

12:00 PM

Overcast

92° 💧 None 💨 10 mph H 40%29.91 inHg

1:00 PM

Overcast

94° 💧 None 💨 11 mph H 38%29.88 inHg

2:00 PM

Overcast

95° 💧 None 💨 12 mph H 39%29.88 inHg

3:00 PM

Overcast

95° 💧 None 💨 11 mph H 40%29.88 inHg

4:00 PM

Mostly cloudy

95° 💧 None 💨 11 mph H 41%29.85 inHg

5:00 PM

Mostly cloudy

94° 💧 None 💨 11 mph H 44%29.85 inHg

6:00 PM

Mostly cloudy

92° 💧 None 💨 9 mph H 50%29.85 inHg

7:00 PM

Mostly cloudy

89° 💧 None 💨 8 mph H 61%29.85 inHg

8:00 PM

Overcast night

87° 💧 None 💨 8 mph H 64%29.85 inHg

9:00 PM

Mostly cloudy night

87° 💧 None 💨 10 mph H 59%29.85 inHg

10:00 PM

Partly cloudy night

86° 💧 None 💨 10 mph H 55%29.85 inHg

11:00 PM

Partly cloudy night

85° 💧 None 💨 9 mph H 51%29.85 inHg

Wednesday

12:00 AM

Partly cloudy night

85° 💧 None 💨 9 mph H 47%29.85 inHg

1:00 AM

Mostly clear night

85° 💧 None 💨 10 mph H 45%29.85 inHg

In Summit and, more broadly, across the state of Illinois: Clear skies will continue through the evening, with temperatures remaining mild to warm, ranging from 77 to 80 degrees Fahrenheit. Light eastward winds will persist, with maximum speeds around 7 mph and occasional gusts reaching up to 9 mph. No precipitation is expected overnight, so conditions will remain dry and calm. It should be a pleasant evening with comfortable temperatures and gentle breezes.

15-Day Weather Outlook for Summit

TomorrowTomorrow

Light rain 86°/68° 💧 0.04 in 💨 13 mph

Monday, Aug 31Mon Aug 31

Light rain 92°/72° 💧 0.02 in 💨 13 mph

Tuesday, Sep 1Tue Sep 1

Light rain 95°/75° 💧 0.04 in 💨 11 mph

Wednesday, Sep 2Wed Sep 2

Sunny 93°/81° 💧 None 💨 14 mph

Thursday, Sep 3Thu Sep 3

Mostly cloudy 94°/73° 💧 None 💨 7 mph

Friday, Sep 4Fri Sep 4

Light rain 90°/72° 💧 0.10 in 💨 13 mph

Saturday, Sep 5Sat Sep 5

Light rain 77°/71° 💧 0.12 in 💨 7 mph

Sunday, Sep 6Sun Sep 6

Mostly cloudy 84°/68° 💧 None 💨 9 mph

Monday, Sep 7Mon Sep 7

Sunny 89°/67° 💧 None 💨 11 mph

Tuesday, Sep 8Tue Sep 8

Sunny 95°/76° 💧 None 💨 14 mph

Wednesday, Sep 9Wed Sep 9

Light rain 90°/74° 💧 0.04 in 💨 9 mph

Thursday, Sep 10Thu Sep 10

Overcast 91°/78° 💧 None 💨 12 mph

Friday, Sep 11Fri Sep 11

Sunny 75°/67° 💧 None 💨 10 mph

Saturday, Sep 12Sat Sep 12

Mostly cloudy 85°/67° 💧 None 💨 10 mph

Sunday, Sep 13Sun Sep 13

Overcast 91°/72° 💧 None 💨 13 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Summit

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Summit

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 2:00 AM

PM2.5 Fine particles Good 6,8µg/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 7,2µg/m³

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

O₃ Ozone Good 17,0µg/m³

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

NO₂ Nitrogen dioxide Good 9,1µg/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 Summit

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 5,8Moderate 😊Good

Tomorrow UV 7,0High 😐Moderate

Monday UV 6,6High 😐Moderate

Tuesday UV 7,4High 😐Moderate

Wednesday UV 8,0Very high 🙂Fair

Thursday UV 8,0Very high —Unavailable

Friday UV 8,0Very high —Unavailable

Hourly UV index today

7:00 AMUV 0,1 8:00 AMUV 0,7 9:00 AMUV 1,8 10:00 AMUV 3,0 11:00 AMUV 4,7 12:00 PMUV 5,2 1:00 PMUV 5,8 2:00 PMUV 5,1 3:00 PMUV 1,8 4:00 PMUV 0,5 5:00 PMUV 0,5 6:00 PMUV 0,4

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

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 Summit

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.08 Population: 10,846

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Forecast data for Summit were last refreshed today at 1:55 AM. The current forecast period extends through 30/08/2026 at 11:00 PM. 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.