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Current weather in Lake Forest is scattered clouds.

Where can I find the hourly weather forecast for Lake Forest?

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

Is the weather forecast for Lake Forest updated regularly?

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

Now · 3:35 PM

Lake Forest Weather & Hourly Forecast

United States · Illinois · 60045

94°F

Partly cloudy

Feels like: 104°F

💧 Humidity 50% 🌡 Pressure 29.88 inHg 💨 Wind 11 mph 👁 Visibility 6.2 mi ☁ Clouds 29% ☀️ UV index 5.1 · Moderate 🌅 Sunrise 6:17 AM 🌇 Sunset 7:24 PM

Hourly Forecast for Lake Forest

Today

4:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 50%29.88 inHg

7:00 PM

Mostly sunny

90° 💧 None 💨 8 mph H 58%29.85 inHg

10:00 PM

Clear night

81° 💧 None 💨 7 mph H 71%29.85 inHg

Tomorrow

1:00 AM

Partly cloudy night

82° 💧 None 💨 8 mph H 64%29.85 inHg

4:00 AM

Overcast night

79° 💧 None 💨 9 mph H 56%29.83 inHg

7:00 AM

Overcast

79° 💧 None 💨 11 mph H 63%29.85 inHg

10:00 AM

Mostly cloudy

83° 💧 None 💨 9 mph H 55%29.88 inHg

1:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 51%29.85 inHg

4:00 PM

Light rain

90° 💧 0.01 in 💨 2 mph H 67%29.88 inHg

7:00 PM

Light rain

85° 💧 0.01 in 💨 5 mph H 69%29.85 inHg

10:00 PM

Moderate rain

78° 💧 0.10 in 💨 11 mph H 85%29.88 inHg

Friday

1:00 AM

Overcast night

77° 💧 None 💨 3 mph H 85%29.88 inHg

4:00 AM

Overcast night

76° 💧 None 💨 3 mph H 87%29.88 inHg

7:00 AM

Mostly cloudy

78° 💧 None 💨 4 mph H 90%29.91 inHg

10:00 AM

Overcast

78° 💧 None 💨 1 mph H 77%29.94 inHg

1:00 PM

Overcast

84° 💧 None 💨 4 mph H 61%29.91 inHg

Today

4:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 50%29.88 inHg

5:00 PM

Partly cloudy

94° 💧 None 💨 11 mph H 51%29.88 inHg

6:00 PM

Mostly sunny

93° 💧 None 💨 9 mph H 53%29.88 inHg

7:00 PM

Mostly sunny

90° 💧 None 💨 8 mph H 58%29.85 inHg

8:00 PM

Clear night

86° 💧 None 💨 6 mph H 64%29.85 inHg

9:00 PM

Clear night

82° 💧 None 💨 7 mph H 72%29.88 inHg

10:00 PM

Clear night

81° 💧 None 💨 7 mph H 71%29.85 inHg

11:00 PM

Mostly clear night

80° 💧 None 💨 6 mph H 69%29.85 inHg

Tomorrow

12:00 AM

Partly cloudy night

81° 💧 None 💨 8 mph H 64%29.85 inHg

1:00 AM

Partly cloudy night

82° 💧 None 💨 8 mph H 64%29.85 inHg

2:00 AM

Overcast night

80° 💧 None 💨 9 mph H 63%29.85 inHg

3:00 AM

Mostly cloudy night

80° 💧 None 💨 8 mph H 59%29.85 inHg

4:00 AM

Overcast night

79° 💧 None 💨 9 mph H 56%29.83 inHg

5:00 AM

Overcast night

79° 💧 None 💨 12 mph H 55%29.83 inHg

6:00 AM

Overcast night

79° 💧 None 💨 12 mph H 57%29.85 inHg

7:00 AM

Overcast

79° 💧 None 💨 11 mph H 63%29.85 inHg

8:00 AM

Mostly cloudy

81° 💧 None 💨 10 mph H 60%29.88 inHg

9:00 AM

Overcast

81° 💧 None 💨 10 mph H 62%29.88 inHg

10:00 AM

Mostly cloudy

83° 💧 None 💨 9 mph H 55%29.88 inHg

11:00 AM

Mostly cloudy

85° 💧 None 💨 9 mph H 49%29.88 inHg

12:00 PM

Mostly cloudy

86° 💧 None 💨 9 mph H 49%29.88 inHg

1:00 PM

Mostly cloudy

86° 💧 None 💨 7 mph H 51%29.85 inHg

2:00 PM

Overcast

81° 💧 None 💨 9 mph H 53%29.88 inHg

3:00 PM

Overcast

83° 💧 None 💨 12 mph H 56%29.91 inHg

4:00 PM

Light rain

90° 💧 0.01 in 💨 2 mph H 67%29.88 inHg

5:00 PM

Mostly cloudy

90° 💧 None 💨 2 mph H 61%29.85 inHg

6:00 PM

Mostly cloudy

89° 💧 None 💨 6 mph H 60%29.85 inHg

7:00 PM

Light rain

85° 💧 0.01 in 💨 5 mph H 69%29.85 inHg

8:00 PM

Overcast night

82° 💧 None 💨 4 mph H 72%29.85 inHg

9:00 PM

Overcast night

81° 💧 None 💨 4 mph H 75%29.88 inHg

10:00 PM

Moderate rain

78° 💧 0.10 in 💨 11 mph H 85%29.88 inHg

11:00 PM

Overcast night

78° 💧 None 💨 4 mph H 87%29.88 inHg

Friday

12:00 AM

Overcast night

78° 💧 None 💨 2 mph H 86%29.88 inHg

1:00 AM

Overcast night

77° 💧 None 💨 3 mph H 85%29.88 inHg

2:00 AM

Overcast night

77° 💧 None 💨 5 mph H 88%29.88 inHg

3:00 AM

Overcast night

77° 💧 None 💨 3 mph H 87%29.88 inHg

4:00 AM

Overcast night

76° 💧 None 💨 3 mph H 87%29.88 inHg

5:00 AM

Mostly cloudy night

77° 💧 None 💨 3 mph H 88%29.88 inHg

6:00 AM

Mostly cloudy night

75° 💧 None 💨 3 mph H 89%29.88 inHg

7:00 AM

Mostly cloudy

78° 💧 None 💨 4 mph H 90%29.91 inHg

8:00 AM

Overcast

75° 💧 None 💨 3 mph H 86%29.91 inHg

9:00 AM

Overcast

77° 💧 None 💨 2 mph H 80%29.94 inHg

10:00 AM

Overcast

78° 💧 None 💨 1 mph H 77%29.94 inHg

11:00 AM

Overcast

81° 💧 None 💨 3 mph H 69%29.91 inHg

12:00 PM

Overcast

82° 💧 None 💨 4 mph H 65%29.91 inHg

1:00 PM

Overcast

84° 💧 None 💨 4 mph H 61%29.91 inHg

2:00 PM

Overcast

86° 💧 None 💨 3 mph H 57%29.88 inHg

3:00 PM

Overcast

88° 💧 None 💨 4 mph H 54%29.88 inHg

4:00 PM

Overcast

89° 💧 None 💨 3 mph H 55%29.88 inHg

5:00 PM

Overcast

88° 💧 None 💨 2 mph H 59%29.88 inHg

6:00 PM

Overcast

86° 💧 None 💨 4 mph H 66%29.85 inHg

7:00 PM

Overcast

82° 💧 None 💨 4 mph H 73%29.88 inHg

8:00 PM

Overcast night

80° 💧 None 💨 4 mph H 78%29.88 inHg

9:00 PM

Mostly cloudy night

79° 💧 None 💨 3 mph H 79%29.88 inHg

10:00 PM

Partly cloudy night

79° 💧 None 💨 3 mph H 79%29.88 inHg

11:00 PM

Partly cloudy night

79° 💧 None 💨 3 mph H 80%29.88 inHg

Saturday

12:00 AM

Partly cloudy night

79° 💧 None 💨 3 mph H 80%29.88 inHg

1:00 AM

Partly cloudy night

78° 💧 None 💨 2 mph H 82%29.88 inHg

2:00 AM

Mostly clear night

77° 💧 None 💨 3 mph H 82%29.88 inHg

3:00 AM

Mostly clear night

76° 💧 None 💨 6 mph H 85%29.91 inHg

4:00 AM

Moderate rain

75° 💧 0.09 in 💨 17 mph H 87%29.91 inHg

5:00 AM

Moderate rain

72° 💧 0.12 in 💨 9 mph H 80%29.88 inHg

6:00 AM

Moderate rain

74° 💧 0.04 in 💨 2 mph H 81%29.85 inHg

7:00 AM

Light rain

72° 💧 0.02 in 💨 5 mph H 86%29.85 inHg

8:00 AM

Mostly sunny

75° 💧 None 💨 4 mph H 83%29.88 inHg

9:00 AM

Mostly sunny

77° 💧 None 💨 5 mph H 76%29.91 inHg

10:00 AM

Mostly sunny

78° 💧 None 💨 6 mph H 73%29.91 inHg

11:00 AM

Sunny

79° 💧 None 💨 6 mph H 72%29.94 inHg

12:00 PM

Sunny

80° 💧 None 💨 6 mph H 71%29.91 inHg

1:00 PM

Sunny

81° 💧 None 💨 7 mph H 70%29.91 inHg

2:00 PM

Sunny

81° 💧 None 💨 8 mph H 70%29.91 inHg

3:00 PM

Sunny

80° 💧 None 💨 10 mph H 73%29.91 inHg

4:00 PM

Mostly sunny

78° 💧 None 💨 11 mph H 76%29.91 inHg

5:00 PM

Mostly sunny

77° 💧 None 💨 11 mph H 78%29.91 inHg

6:00 PM

Mostly sunny

75° 💧 None 💨 9 mph H 79%29.91 inHg

7:00 PM

Mostly sunny

73° 💧 None 💨 10 mph H 82%29.94 inHg

8:00 PM

Clear night

72° 💧 None 💨 11 mph H 82%29.94 inHg

9:00 PM

Clear night

71° 💧 None 💨 11 mph H 82%29.94 inHg

10:00 PM

Clear night

71° 💧 None 💨 13 mph H 82%29.97 inHg

11:00 PM

Clear night

73° 💧 None 💨 14 mph H 74%29.97 inHg

Sunday

12:00 AM

Clear night

72° 💧 None 💨 13 mph H 73%29.97 inHg

1:00 AM

Mostly clear night

71° 💧 None 💨 13 mph H 74%30.00 inHg

2:00 AM

Overcast night

71° 💧 None 💨 11 mph H 74%30.00 inHg

3:00 AM

Mostly cloudy night

70° 💧 None 💨 11 mph H 77%30.00 inHg

4:00 AM

Partly cloudy night

69° 💧 None 💨 11 mph H 79%30.00 inHg

5:00 AM

Partly cloudy night

69° 💧 None 💨 10 mph H 76%30.03 inHg

6:00 AM

Partly cloudy night

68° 💧 None 💨 9 mph H 73%30.03 inHg

7:00 AM

Partly cloudy

68° 💧 None 💨 8 mph H 70%30.03 inHg

8:00 AM

Sunny

69° 💧 None 💨 9 mph H 68%30.06 inHg

9:00 AM

Sunny

70° 💧 None 💨 9 mph H 64%30.06 inHg

10:00 AM

Mostly sunny

71° 💧 None 💨 9 mph H 62%30.06 inHg

11:00 AM

Sunny

72° 💧 None 💨 10 mph H 60%30.09 inHg

12:00 PM

Mostly sunny

73° 💧 None 💨 10 mph H 59%30.06 inHg

1:00 PM

Partly cloudy

73° 💧 None 💨 9 mph H 56%30.06 inHg

2:00 PM

Mostly cloudy

74° 💧 None 💨 8 mph H 54%30.06 inHg

3:00 PM

Partly cloudy

74° 💧 None 💨 9 mph H 52%30.06 inHg

In Lake Forest and, more broadly, across the state of Illinois: As the afternoon progresses into the evening, skies will remain mostly sunny with just a few clouds dotted across the sky. Temperatures will stay hot, ranging from around 82 to 94 degrees Fahrenheit. Winds will be light, coming from the south at no more than 8 mph, with occasional gusts reaching up to 23 mph. No precipitation is expected during this time, so dry conditions will continue into the night. The warm temperatures and gentle breezes will make for a pleasant evening, though it will remain warm after sunset. Be sure to stay hydrated if you're spending time outdoors later in the day. Overall, expect clear and warm conditions as the evening unfolds.

15-Day Weather Outlook for Lake Forest

TomorrowTomorrow

Moderate rain 90°/78° 💧 0.12 in 💨 12 mph

Friday, Sep 4Fri Sep 4

Overcast 89°/75° 💧 None 💨 5 mph

Saturday, Sep 5Sat Sep 5

Moderate rain 81°/71° 💧 0.26 in 💨 17 mph

Sunday, Sep 6Sun Sep 6

Partly cloudy 74°/68° 💧 None 💨 13 mph

Monday, Sep 7Mon Sep 7

Mostly cloudy 77°/66° 💧 None 💨 11 mph

Tuesday, Sep 8Tue Sep 8

Light rain 90°/72° 💧 0.02 in 💨 13 mph

Wednesday, Sep 9Wed Sep 9

Light rain 83°/73° 💧 0.11 in 💨 6 mph

Thursday, Sep 10Thu Sep 10

Light rain 77°/68° 💧 0.15 in 💨 8 mph

Friday, Sep 11Fri Sep 11

Light rain 73°/65° 💧 0.01 in 💨 10 mph

Saturday, Sep 12Sat Sep 12

Light rain 93°/71° 💧 0.01 in 💨 13 mph

Sunday, Sep 13Sun Sep 13

Light rain 82°/70° 💧 0.03 in 💨 18 mph

Monday, Sep 14Mon Sep 14

Overcast 71°/63° 💧 None 💨 7 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 82°/62° 💧 None 💨 8 mph

Wednesday, Sep 16Wed Sep 16

Sunny 81°/62° 💧 None 💨 13 mph

Thursday, Sep 17Thu Sep 17

Overcast 65°/54° 💧 None 💨 13 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Lake Forest

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Lake Forest

Hourly forecast · Updated every 2 hours

Moderate

Nearest forecast value 4:00 PM

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

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

O₃ Ozone Moderate 101,7µg/m³

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

NO₂ Nitrogen dioxide Good 1,0µg/m³

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

Sensitive people should reduce strenuous and prolonged outdoor exertion.

UV & HEALTH

UV, Sun & Health Outlook in Lake Forest

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 7,1High 😐Moderate

Tomorrow UV 5,5Moderate 🙂Fair

Friday UV 6,0High 🙂Fair

Saturday UV 6,5High 🙂Fair

Sunday UV 6,0High 🙂Fair

Monday UV 6,0High —Unavailable

Tuesday UV 4,0Moderate —Unavailable

Hourly UV index today

4:00 PMUV 3,2 5:00 PMUV 1,5 6:00 PMUV 0,5 7:00 PMUV 0,0

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.

Caution for sensitive people

People with respiratory or cardiovascular conditions should reduce prolonged outdoor exertion.

High heat

Stay hydrated and avoid intense exercise during the hottest part of the day.

Best in the morning or late in the day

For walking, running or cycling, prefer the early morning or late afternoon.

WIND OUTLOOK

Hourly Wind Forecast for Lake Forest

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

Internal PR simulation: 4.42 Population: 19,416

DISCOVER WEATHER NEARBY Weather in other cities

Explore current conditions and forecasts for other locations.

Forecast data for Lake Forest were last refreshed today at 3:35 PM. The current forecast period extends through 04/09/2026 at 1:00 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.