Climate and monthly weather forecast
Lake Bluff, IL

Weather in January

January, the same as December, in Lake Bluff, Illinois, is another subzero cold winter month, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 28.6°F (-1.9°C). January is the coldest month, with an average high-temperature of 28.6°F (-1.9°C) and an average low-temperature of 18.9°F (-7.3°C). Weather in January »

Weather in February

February, the last month of the winter in Lake Bluff, is another freezing cold month, with an average temperature fluctuating between 21.6°F (-5.8°C) and 31.3°F (-0.4°C). In Lake Bluff, Illinois, the average high-temperature in February is practically the same as in January - a still subzero cold 31.3°F (-0.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a cold month in Lake Bluff, Illinois, with an average temperature fluctuating between 31.5°F (-0.3°C) and 41.5°F (5.3°C). In March, the average high-temperature rises from a freezing cold 31.3°F (-0.4°C) in February to a wintry 41.5°F (5.3°C). Weather in March »

Weather in April

April in Lake Bluff, Illinois, is a cool spring month, with an average temperature ranging between max 50.9°F (10.5°C) and min 39.7°F (4.3°C). In Lake Bluff, the average high-temperature in April rises from a cold 41.5°F (5.3°C) in March to a cool 50.9°F (10.5°C). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Lake Bluff, Illinois, with an average temperature varying between 49.6°F (9.8°C) and 61.2°F (16.2°C). In Lake Bluff, the average high-temperature in May increases from a fresh 50.9°F (10.5°C) in April to an enjoyable 61.2°F (16.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a pleasant month in Lake Bluff, Illinois, with an average temperature varying between 71.1°F (21.7°C) and 59.4°F (15.2°C). In Lake Bluff, Illinois, the average high-temperature in June increases from an enjoyable 61.2°F (16.2°C) in May to an agreeable 71.1°F (21.7°C). Weather in June »

Weather in July

July is a moderately hot summer month in Lake Bluff, Illinois, with temperature in the range of an average high of 77.7°F (25.4°C) and an average low of 66.7°F (19.3°C). July is the warmest month, with an average high-temperature of 77.7°F (25.4°C) and an average low-temperature of 66.7°F (19.3°C). Weather in July »

Weather in August

August, the last month of the summer in Lake Bluff, is another warm month, with an average temperature fluctuating between 66.7°F (19.3°C) and 77.5°F (25.3°C). In August, the average high-temperature is essentially the same as in July - a still warm 77.5°F (25.3°C). Weather in August »

Weather in September

September, the first month of the autumn in Lake Bluff, is also an agreeable month, with an average temperature ranging between min 60.1°F (15.6°C) and max 71.2°F (21.8°C). In September, the average high-temperature slightly decreases from a warm 77.5°F (25.3°C) in August to a pleasant 71.2°F (21.8°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Lake Bluff, Illinois, with an average temperature varying between 47.7°F (8.7°C) and 58.6°F (14.8°C). In Lake Bluff, the average high-temperature in October drops from an agreeable 71.2°F (21.8°C) in September to a mild 58.6°F (14.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Lake Bluff, Illinois, with an average temperature ranging between min 35.1°F (1.7°C) and max 45.5°F (7.5°C). In Lake Bluff, the average high-temperature in November decreases from a mild 58.6°F (14.8°C) in October to a chilly 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Lake Bluff, Illinois, with an average temperature varying between 26.2°F (-3.2°C) and 34.5°F (1.4°C). In Lake Bluff, the average high-temperature in December decreases from a chilly 45.5°F (7.5°C) in November to a wintry 34.5°F (1.4°C). Weather in December »
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FAQ

What is the coldest month in Lake Bluff?

January is the coldest month in Lake Bluff, with an average high-temperature of 28.6°F (-1.9°C) and an average low-temperature of 18.9°F (-7.3°C).

What is the most humid month in Lake Bluff?

The months with the highest humidity in Lake Bluff, Illinois, are January and February, with an average relative humidity of 82%.

How many days does it rain in Lake Bluff?

In Lake Bluff, during the entire year, the rain falls for 154.1 days and collects up to 30.24" (768mm) of precipitation.

When does it snow in Lake Bluff?

January through April, October through December are months with snowfall in Lake Bluff.

What is the snowiest month in Lake Bluff?

The month with the most snowfall in Lake Bluff, Illinois, is January, when snow falls for 11.9 days and typically aggregates up to 4.13" (105mm) of snow.

How much does it snow in Lake Bluff?

In Lake Bluff, during the entire year, snow falls for 42.9 days and aggregates up to 13.82" (351mm) of snow.

What is the month with the least sunshine in Lake Bluff?

With an average of 3.8h of sunshine, January has the least sunshine of the year.

What is the month with the coldest ocean in Lake Bluff?

February is the month with the coldest seawater, with an average ocean temperature of 37°F (2.8°C).

When is Daylight Saving Time (DST) in Lake Bluff?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Lake Bluff, Illinois, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

What is the rainiest month in Lake Bluff?

The months with the most rainfall in Lake Bluff, Illinois, are May and June, with an average 3.82" (97mm) of precipitation.

When it does not snow in Lake Bluff?

May through September are months without snowfall in Lake Bluff, Illinois.

When are the longest days in Lake Bluff?

June has the longest days of the year in Lake Bluff, with an average of 15h and 13min of daylight.

What is the month with the highest UV index in Lake Bluff?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Lake Bluff.

What is the warmest month in Lake Bluff?

July is the warmest month in Lake Bluff, Illinois, with an average high-temperature of 77.7°F (25.4°C) and an average low-temperature of 66.7°F (19.3°C).

When is the ocean warmest in Lake Bluff?

August is the month with the warmest seawater, with an average ocean temperature of 73.2°F (22.9°C).

What month has the most sunshine in Lake Bluff?

The month with the most sunshine is August, with an average of 10.7h of sunshine.

What is the least humid month in Lake Bluff?

October is the least humid month in Lake Bluff, with an average relative humidity of 73%.

What is the driest month in Lake Bluff?

December is the month with the least rainfall in Lake Bluff, Illinois. Rain falls for 8.6 days and accumulates 1.3" (33mm) of precipitation.

What is the month with the shortest days in Lake Bluff?

The month with the shortest days in Lake Bluff is December, with an average of 9h and 9min of daylight.

What is the month with the lowest UV index in Lake Bluff?

December is the month with the lowest UV index in Lake Bluff, Illinois, with an average maximum UV index of 1.

Average temperature
Lake Bluff, IL

Average temperature - Lake Bluff, IL

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).

The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure
Lake Bluff, IL

Average pressure - Lake Bluff, IL

The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Lake Bluff, IL

Average wind speed - Lake Bluff, IL

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).

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Average humidity
Lake Bluff, IL

Average humidity - Lake Bluff, IL

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall
Lake Bluff, IL

Average rainfall - Lake Bluff, IL

The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").

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Average rainfall days
Lake Bluff, IL

Average rainfall days - Lake Bluff, IL

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).

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Average snowfall
Lake Bluff, IL

Average snowfall - Lake Bluff, IL

The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days
Lake Bluff, IL

Average snowfall days - Lake Bluff, IL

The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature
Lake Bluff, IL

Average sea temperature - Lake Bluff, IL

The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (37.1°F).

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Average daylight / Average sunshine
Lake Bluff, IL

Average daylight / Average sunshine - Lake Bluff, IL

The month with the longest days is June (Average daylight: 15h and 13min).
The month with the shortest days is December (Average daylight: 9h and 9min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days
Lake Bluff, IL

Average sunshine days - Lake Bluff, IL

The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).

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Average visibility
Lake Bluff, IL

Average visibility - Lake Bluff, IL

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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