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Current weather in Round Lake Heights is broken clouds.

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Weather data for Round Lake Heights is updated regularly with the latest available observations and forecasts.

Now · 2:23 AM

Round Lake Heights Weather & Hourly Forecast

United States · Illinois · 60073

56°F

Mostly cloudy night

Feels like: 53°F

💧 Humidity 88% 🌡 Pressure 30.33 inHg 💨 Wind 7 mph 👁 Visibility 17.1 mi ☁ Clouds 63% ☀️ UV index 0.0 · Low 🌅 Sunrise 6:39 AM 🌇 Sunset 6:49 PM

Hourly Forecast for Round Lake Heights

Today

3:00 AM

Mostly cloudy night

56° 💧 None 💨 7 mph H 88%30.36 inHg

6:00 AM

Mostly cloudy night

56° 💧 0.000 in 💨 6 mph H 91%30.36 inHg

9:00 AM

Mostly cloudy

60° 💧 0.000 in 💨 10 mph H 78%30.39 inHg

12:00 PM

Mostly cloudy

62° 💧 0.000 in 💨 9 mph H 75%30.42 inHg

3:00 PM

Mostly sunny

65° 💧 0.001 in 💨 11 mph H 67%30.36 inHg

6:00 PM

Overcast

63° 💧 None 💨 8 mph H 76%30.33 inHg

9:00 PM

Mostly cloudy night

63° 💧 None 💨 8 mph H 76%30.36 inHg

Tomorrow

12:00 AM

Clear night

61° 💧 None 💨 8 mph H 77%30.36 inHg

3:00 AM

Clear night

56° 💧 None 💨 5 mph H 78%30.33 inHg

6:00 AM

Mostly clear night

57° 💧 None 💨 7 mph H 87%30.36 inHg

9:00 AM

Partly cloudy

61° 💧 None 💨 10 mph H 80%30.36 inHg

12:00 PM

Mostly cloudy

64° 💧 None 💨 8 mph H 73%30.36 inHg

3:00 PM

Overcast

65° 💧 None 💨 8 mph H 69%30.30 inHg

6:00 PM

Overcast

62° 💧 None 💨 6 mph H 79%30.30 inHg

9:00 PM

Overcast night

60° 💧 None 💨 3 mph H 86%30.30 inHg

Friday

12:00 AM

Overcast night

61° 💧 None 💨 5 mph H 81%30.30 inHg

Today

3:00 AM

Mostly cloudy night

56° 💧 None 💨 7 mph H 88%30.36 inHg

4:00 AM

Mostly cloudy night

56° 💧 None 💨 6 mph H 89%30.36 inHg

5:00 AM

Overcast night

56° 💧 None 💨 6 mph H 91%30.36 inHg

6:00 AM

Mostly cloudy night

56° 💧 0.000 in 💨 6 mph H 91%30.36 inHg

7:00 AM

Mostly cloudy

57° 💧 None 💨 7 mph H 89%30.39 inHg

8:00 AM

Mostly sunny

58° 💧 None 💨 8 mph H 84%30.39 inHg

9:00 AM

Mostly cloudy

60° 💧 None 💨 10 mph H 78%30.39 inHg

10:00 AM

Overcast

61° 💧 0.000 in 💨 10 mph H 76%30.39 inHg

11:00 AM

Overcast

61° 💧 None 💨 9 mph H 78%30.42 inHg

12:00 PM

Mostly cloudy

62° 💧 0.000 in 💨 9 mph H 75%30.42 inHg

1:00 PM

Partly cloudy

64° 💧 None 💨 9 mph H 70%30.39 inHg

2:00 PM

Mostly sunny

65° 💧 None 💨 10 mph H 67%30.39 inHg

3:00 PM

Mostly sunny

65° 💧 0.000 in 💨 11 mph H 67%30.36 inHg

4:00 PM

Mostly cloudy

65° 💧 0.001 in 💨 13 mph H 68%30.36 inHg

5:00 PM

Overcast

63° 💧 None 💨 11 mph H 73%30.36 inHg

6:00 PM

Overcast

63° 💧 None 💨 8 mph H 76%30.33 inHg

7:00 PM

Overcast night

63° 💧 None 💨 7 mph H 76%30.33 inHg

8:00 PM

Overcast night

63° 💧 None 💨 7 mph H 76%30.36 inHg

9:00 PM

Mostly cloudy night

63° 💧 None 💨 8 mph H 76%30.36 inHg

10:00 PM

Partly cloudy night

63° 💧 None 💨 8 mph H 73%30.36 inHg

11:00 PM

Mostly clear night

62° 💧 None 💨 8 mph H 74%30.36 inHg

Tomorrow

12:00 AM

Clear night

61° 💧 None 💨 8 mph H 77%30.36 inHg

1:00 AM

Clear night

59° 💧 None 💨 7 mph H 76%30.36 inHg

2:00 AM

Clear night

57° 💧 None 💨 6 mph H 76%30.33 inHg

3:00 AM

Clear night

56° 💧 None 💨 5 mph H 78%30.33 inHg

4:00 AM

Clear night

56° 💧 None 💨 5 mph H 82%30.33 inHg

5:00 AM

Mostly clear night

56° 💧 None 💨 5 mph H 85%30.33 inHg

6:00 AM

Mostly clear night

57° 💧 None 💨 7 mph H 87%30.36 inHg

7:00 AM

Mostly sunny

57° 💧 None 💨 7 mph H 87%30.36 inHg

8:00 AM

Partly cloudy

59° 💧 None 💨 6 mph H 85%30.36 inHg

9:00 AM

Partly cloudy

61° 💧 None 💨 10 mph H 80%30.36 inHg

10:00 AM

Partly cloudy

63° 💧 None 💨 9 mph H 76%30.36 inHg

11:00 AM

Partly cloudy

64° 💧 None 💨 9 mph H 73%30.36 inHg

12:00 PM

Mostly cloudy

64° 💧 None 💨 8 mph H 73%30.36 inHg

1:00 PM

Partly cloudy

65° 💧 None 💨 9 mph H 70%30.33 inHg

2:00 PM

Partly cloudy

65° 💧 None 💨 8 mph H 68%30.33 inHg

3:00 PM

Overcast

65° 💧 None 💨 8 mph H 69%30.30 inHg

4:00 PM

Overcast

64° 💧 None 💨 8 mph H 73%30.30 inHg

5:00 PM

Overcast

63° 💧 None 💨 8 mph H 75%30.30 inHg

6:00 PM

Overcast

62° 💧 None 💨 6 mph H 79%30.30 inHg

7:00 PM

Overcast night

61° 💧 None 💨 4 mph H 84%30.30 inHg

8:00 PM

Overcast night

60° 💧 None 💨 4 mph H 86%30.30 inHg

9:00 PM

Overcast night

60° 💧 None 💨 3 mph H 86%30.30 inHg

10:00 PM

Overcast night

61° 💧 None 💨 3 mph H 85%30.30 inHg

11:00 PM

Overcast night

61° 💧 None 💨 4 mph H 82%30.30 inHg

Friday

12:00 AM

Overcast night

61° 💧 None 💨 5 mph H 81%30.30 inHg

1:00 AM

Overcast night

61° 💧 None 💨 7 mph H 77%30.27 inHg

2:00 AM

Overcast night

60° 💧 None 💨 5 mph H 77%30.27 inHg

3:00 AM

Overcast night

59° 💧 None 💨 4 mph H 80%30.27 inHg

4:00 AM

Overcast night

59° 💧 None 💨 4 mph H 82%30.30 inHg

5:00 AM

Overcast night

59° 💧 None 💨 4 mph H 83%30.30 inHg

6:00 AM

Overcast night

58° 💧 None 💨 4 mph H 85%30.30 inHg

7:00 AM

Overcast

58° 💧 None 💨 4 mph H 87%30.30 inHg

8:00 AM

Overcast

59° 💧 None 💨 4 mph H 85%30.33 inHg

9:00 AM

Partly cloudy

60° 💧 None 💨 4 mph H 80%30.33 inHg

10:00 AM

Mostly cloudy

63° 💧 None 💨 6 mph H 72%30.33 inHg

11:00 AM

Partly cloudy

64° 💧 None 💨 6 mph H 68%30.33 inHg

12:00 PM

Mostly sunny

65° 💧 None 💨 7 mph H 64%30.33 inHg

1:00 PM

Mostly sunny

66° 💧 None 💨 7 mph H 62%30.30 inHg

2:00 PM

Sunny

66° 💧 None 💨 7 mph H 59%30.30 inHg

3:00 PM

Mostly sunny

65° 💧 None 💨 7 mph H 57%30.27 inHg

4:00 PM

Partly cloudy

65° 💧 None 💨 7 mph H 57%30.27 inHg

5:00 PM

Sunny

63° 💧 None 💨 7 mph H 60%30.27 inHg

6:00 PM

Sunny

61° 💧 None 💨 5 mph H 68%30.27 inHg

7:00 PM

Mostly clear night

58° 💧 None 💨 3 mph H 79%30.27 inHg

10:00 PM

Overcast night

57° 💧 None 💨 4 mph H 81%30.27 inHg

Saturday

1:00 AM

Partly cloudy night

56° 💧 None 💨 5 mph H 81%30.24 inHg

4:00 AM

Mostly cloudy night

55° 💧 None 💨 3 mph H 82%30.21 inHg

7:00 AM

Mostly cloudy

54° 💧 None 💨 5 mph H 93%30.24 inHg

10:00 AM

Partly cloudy

61° 💧 None 💨 7 mph H 71%30.24 inHg

1:00 PM

Overcast

64° 💧 None 💨 7 mph H 67%30.21 inHg

4:00 PM

Overcast

63° 💧 None 💨 6 mph H 72%30.15 inHg

7:00 PM

Mostly cloudy night

58° 💧 None 💨 5 mph H 89%30.12 inHg

10:00 PM

Overcast night

58° 💧 None 💨 5 mph H 89%30.09 inHg

Sunday

1:00 AM

Overcast night

59° 💧 None 💨 2 mph H 89%30.09 inHg

4:00 AM

Overcast night

59° 💧 None 💨 2 mph H 87%30.06 inHg

7:00 AM

Overcast

58° 💧 None 💨 0 mph H 90%30.06 inHg

10:00 AM

Overcast

64° 💧 None 💨 2 mph H 76%30.06 inHg

1:00 PM

Overcast

68° 💧 None 💨 2 mph H 65%30.03 inHg

4:00 PM

Partly cloudy

70° 💧 None 💨 2 mph H 61%29.97 inHg

7:00 PM

Mostly clear night

64° 💧 None 💨 1 mph H 79%29.94 inHg

10:00 PM

Overcast night

61° 💧 None 💨 2 mph H 90%29.97 inHg

Monday

1:00 AM

Overcast night

60° 💧 None 💨 3 mph H 86%29.94 inHg

4:00 AM

Overcast night

60° 💧 None 💨 2 mph H 86%29.94 inHg

7:00 AM

Overcast

60° 💧 None 💨 3 mph H 86%29.94 inHg

10:00 AM

Mostly cloudy

67° 💧 None 💨 3 mph H 74%29.94 inHg

1:00 PM

Overcast

73° 💧 None 💨 5 mph H 61%29.88 inHg

7:00 PM

Partly cloudy night

71° 💧 None 💨 3 mph H 58%29.97 inHg

Tuesday

1:00 AM

Clear night

64° 💧 None 💨 6 mph H 82%29.91 inHg

7:00 AM

Sunny

59° 💧 None 💨 3 mph H 94%29.91 inHg

1:00 PM

Sunny

57° 💧 None 💨 5 mph H 96%29.91 inHg

7:00 PM

Clear night

74° 💧 None 💨 7 mph H 59%29.85 inHg

Wednesday

1:00 AM

Overcast night

66° 💧 None 💨 8 mph H 78%29.80 inHg

7:00 AM

Moderate rain

63° 💧 None 💨 9 mph H 95%29.77 inHg

1:00 PM

Moderate rain

60° 💧 None 💨 9 mph H 96%29.74 inHg

7:00 PM

Light rain

63° 💧 None 💨 6 mph H 94%29.74 inHg

Thursday

1:00 AM

Light rain

62° 💧 None 💨 4 mph H 97%29.74 inHg

7:00 AM

Overcast

62° 💧 None 💨 6 mph H 99%29.77 inHg

1:00 PM

Light rain

64° 💧 None 💨 7 mph H 99%29.77 inHg

7:00 PM

Light rain

68° 💧 None 💨 8 mph H 96%29.74 inHg

Friday

1:00 AM

Light rain

66° 💧 None 💨 8 mph H 97%29.68 inHg

7:00 AM

Light rain

66° 💧 None 💨 8 mph H 99%29.65 inHg

1:00 PM

Overcast

64° 💧 None 💨 12 mph H 97%29.71 inHg

7:00 PM

Overcast night

73° 💧 None 💨 14 mph H 61%29.74 inHg

Saturday

1:00 AM

Clear night

67° 💧 None 💨 8 mph H 77%29.74 inHg

7:00 AM

Sunny

56° 💧 None 💨 4 mph H 87%29.77 inHg

1:00 PM

Sunny

55° 💧 None 💨 9 mph H 85%29.71 inHg

7:00 PM

Overcast night

65° 💧 None 💨 13 mph H 54%29.65 inHg

Sunday

1:00 AM

Light rain

56° 💧 None 💨 7 mph H 95%29.65 inHg

7:00 AM

Sunny

52° 💧 None 💨 9 mph H 95%29.68 inHg

1:00 PM

Overcast

53° 💧 None 💨 9 mph H 91%29.74 inHg

7:00 PM

Overcast night

61° 💧 None 💨 13 mph H 64%29.83 inHg

Monday

1:00 AM

Overcast night

55° 💧 None 💨 8 mph H 73%29.88 inHg

7:00 AM

Overcast

54° 💧 None 💨 8 mph H 76%29.88 inHg

1:00 PM

Mostly sunny

48° 💧 None 💨 8 mph H 82%29.94 inHg

7:00 PM

Overcast night

56° 💧 None 💨 11 mph H 59%29.97 inHg

Tuesday

1:00 AM

Overcast night

54° 💧 None 💨 5 mph H 66%30.00 inHg

7:00 AM

Partly cloudy

50° 💧 None 💨 5 mph H 75%30.03 inHg

1:00 PM

Mostly sunny

45° 💧 None 💨 5 mph H 89%30.06 inHg

7:00 PM

Overcast night

58° 💧 None 💨 5 mph H 63%30.06 inHg

Wednesday

1:00 AM

Overcast night

54° 💧 None 💨 4 mph H 76%30.09 inHg

7:00 AM

Overcast

52° 💧 None 💨 4 mph H 85%30.09 inHg

1:00 PM

Overcast

51° 💧 None 💨 7 mph H 90%30.12 inHg

In Round Lake Heights and, more broadly, across the state of Illinois: This morning begins with mostly cloudy skies and mild temperatures ranging from 60 to 69 degrees Fahrenheit. Winds will be coming from the northeast at around 11 mph, with gusts reaching up to 21 mph. As the day progresses into the afternoon, the cloud cover is expected to persist, but no precipitation is anticipated. Temperatures are likely to remain steady within the mild range, providing comfortable conditions for outdoor activities. Winds will continue from the northeast, maintaining a moderate breeze throughout the day. Overall, it will be a relatively calm day with partly cloudy skies and no significant weather disruptions.

15-Day Weather Outlook for Round Lake Heights

TomorrowTomorrow

Mostly sunny 65°/56° 💧 None 💨 10 mph

Friday, Sep 25Fri Sep 25

Overcast 66°/57° 💧 None 💨 7 mph

Saturday, Sep 26Sat Sep 26

Partly cloudy 64°/54° 💧 None 💨 7 mph

Sunday, Sep 27Sun Sep 27

Overcast 70°/58° 💧 0.015 in 💨 2 mph

Monday, Sep 28Mon Sep 28

Overcast 73°/60° 💧 0.035 in 💨 5 mph

Tuesday, Sep 29Tue Sep 29

Sunny 74°/57° 💧 None 💨 7 mph

Wednesday, Sep 30Wed Sep 30

Moderate rain 66°/60° 💧 1.139 in 💨 9 mph

Thursday, Oct 1Thu Oct 1

Light rain 68°/62° 💧 0.735 in 💨 8 mph

Friday, Oct 2Fri Oct 2

Light rain 73°/64° 💧 0.298 in 💨 14 mph

Saturday, Oct 3Sat Oct 3

Overcast 67°/55° 💧 0.004 in 💨 13 mph

Sunday, Oct 4Sun Oct 4

Light rain 61°/52° 💧 0.100 in 💨 13 mph

Monday, Oct 5Mon Oct 5

Overcast 56°/48° 💧 0.002 in 💨 11 mph

Tuesday, Oct 6Tue Oct 6

Overcast 58°/45° 💧 None 💨 5 mph

Wednesday, Oct 7Wed Oct 7

Overcast 54°/51° 💧 0.004 in 💨 7 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Round Lake Heights

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Round Lake Heights

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 3:00 AM

PM2.5 Fine particles Good 3,1µg/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 3,8µg/m³

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

O₃ Ozone Fair 67,7µg/m³

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

NO₂ Nitrogen dioxide Good 6,4µg/m³

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

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Round Lake Heights

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 5,3Moderate 🙂Fair

Tomorrow UV 4,3Moderate 🙂Fair

Friday UV 5,5Moderate 😐Moderate

Saturday UV 5,0Moderate 😐Moderate

Sunday UV 5,0Moderate 🙂Fair

Monday UV 5,0Moderate —Unavailable

Tuesday UV 5,0Moderate —Unavailable

Hourly UV index today

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

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

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

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 Round Lake Heights

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · ROUND LAKE HEIGHTS, ILLINOIS

Tonight's Stargazing & Shooting Stars

Fair observing conditions. Best local viewing window: 4:00 AM–5:00 AM.

51/100Best-hour score

BEST TIME TONIGHT 4:00 AM–5:00 AM Astronomical darkness: 8:24 PM–5:06 AM

☁ Cloud cover 66% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 63° high at the best hour.

✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min49%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

ACTIVE NOW

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Round Lake Heights were last refreshed today at 2:23 AM. The current forecast period extends through 25/09/2026 at 12:00 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.