Climate and monthly weather forecast
Forest Lake, IL

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Weather in January

January, the same as December, in Forest Lake, Illinois, is a freezing cold winter month, with an average temperature ranging between min 16.3°F (-8.7°C) and max 27.7°F (-2.4°C). January, having an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 16.3°F (-8.7°C), is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Forest Lake, Illinois, with temperature in the range of an average low of 18.9°F (-7.3°C) and an average high of 31.1°F (-0.5°C). Forest Lake's average high-temperature in February sits at a still freezing cold 31.1°F (-0.5°C), showing little difference from the previous month. Weather in February »

Weather in March

March, the first month of the spring in Forest Lake, is a frosty month, with an average temperature varying between 43.5°F (6.4°C) and 30.4°F (-0.9°C). As February transitions into March, Forest Lake sees a rise in the average high-temperature, moving from a freezing cold 31.1°F (-0.5°C) to a chilly 43.5°F (6.4°C). Weather in March »

Weather in April

April is a fresh spring month in Forest Lake, Illinois, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 39.2°F (4°C). In April, the average high-temperature increases from a chilly 43.5°F (6.4°C) in March to a fresh 54.3°F (12.4°C). Weather in April »

Weather in May

May, the last month of the spring in Forest Lake, is an enjoyable month, with temperature in the range of an average low of 50.2°F (10.1°C) and an average high of 66.4°F (19.1°C). With the arrival of May, the average high-temperature transitions from a cool 54.3°F (12.4°C) in April to an enjoyable 66.4°F (19.1°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Forest Lake, Illinois, with temperature in the range of an average low of 59.7°F (15.4°C) and an average high of 75.9°F (24.4°C). With the onset of June, Forest Lake experiences a temperature shift, with the average high-temperature moving from an enjoyable 66.4°F (19.1°C) in May to a moderately hot 75.9°F (24.4°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Forest Lake, Illinois, with an average temperature ranging between max 80.6°F (27°C) and min 64.9°F (18.3°C). Forest Lake's July weather, with an average high temperature of 80.6°F (27°C) and an average low temperature of 64.9°F (18.3°C), tends to be the warmest of the year. During July, the heat index is evaluated at a tropical 86°F (30°C). Weather in July »

Weather in August

August, the last month of the summer in Forest Lake, is another warm month, with an average temperature fluctuating between 79.3°F (26.3°C) and 63.5°F (17.5°C). August's onset sees an average high-temperature of a still warm 79.3°F (26.3°C), exhibiting a slight fluctuation from the previous month. Weather in August »

Weather in September

September, the first month of the autumn in Forest Lake, is also an agreeable month, with temperature in the range of an average low of 57.2°F (14°C) and an average high of 72.9°F (22.7°C). September signals a slight drop in average high-temperature, sliding from August's moderately hot 79.3°F (26.3°C) to an agreeable 72.9°F (22.7°C). Weather in September »

Weather in October

October, like September, is another mild autumn month in Forest Lake, Illinois, with an average temperature fluctuating between 59.5°F (15.3°C) and 45.3°F (7.4°C). October ushers in a slight temperature change, with average high-temperatures reducing from September's agreeable 72.9°F (22.7°C) to a moderate 59.5°F (15.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Forest Lake, Illinois, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 33.1°F (0.6°C). In Forest Lake, the onset of November is marked by a decreased average high-temperature, declining from October's refreshing 59.5°F (15.3°C) to a chilly 45.1°F (7.3°C). Weather in November »

Weather in December

December, the first month of the winter in Forest Lake, is still a cold month, with an average temperature fluctuating between 23.9°F (-4.5°C) and 33.4°F (0.8°C). Forest Lake's progression into December includes a drop in the average high-temperature, from a chilly 45.1°F (7.3°C) in November to an icy 33.4°F (0.8°C). Weather in December »
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Frequently asked questions

What is the coldest month in Forest Lake?

In Forest Lake, January is known for its average lowest temperatures, reaching a high of 27.7°F (-2.4°C) and a low of 16.3°F (-8.7°C).

What is the most humid month in Forest Lake?

January and February, with an average relative humidity of 83%, are most humid months.

How many days does it rain in Forest Lake?

In Forest Lake, during the entire year, the rain falls for 163.1 days and collects up to 32.24" (819mm) of precipitation.

When does it snow in Forest Lake?

January through May, October through December are months with snowfall.

How much does it snow in Forest Lake?

In Forest Lake, during the entire year, snow falls for 55.5 days and aggregates up to 22.95" (583mm) of snow.

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

January has the least sunshine of the year in Forest Lake, with an average of 3.7h of sunshine.

When is the lowest UV index in Forest Lake?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Forest Lake, Illinois.

What is the snowiest month in Forest Lake?

February is the month with the most snowfall in Forest Lake, Illinois. Snow falls for 12.8 days and accumulates 6.22" (158mm) of snow.

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

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the rainiest month in Forest Lake?

June is the month with the most rainfall in Forest Lake, Illinois. Rain falls for 18.8 days and accumulates 4.13" (105mm) of precipitation.

When it does not snow in Forest Lake?

In Forest Lake, snow does not fall in June through September.

When are the longest days in Forest Lake?

With an average of 15h and 12min of daylight, June has the longest days of the year in Forest Lake.

What time of the year is the hottest in Forest Lake?

July is the warmest month, with an average high-temperature of 80.6°F (27°C) and an average low-temperature of 64.9°F (18.3°C).

What are the months with the most sunshine in Forest Lake?

The months with the most sunshine are July and August, with an average of 10.1h of sunshine.

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

The months with the highest UV index are July and August, with an average maximum UV index of 6.

What is the least humid month in Forest Lake?

With an average relative humidity of 74%, October is the least humid month.

What is the driest month in Forest Lake?

November is the month with the least rainfall in Forest Lake, Illinois. Rain falls for 9.4 days and accumulates 1.61" (41mm) of precipitation.

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

The month with the shortest days in Forest Lake, Illinois, is December, with an average of 9h and 12min of daylight.

Average temperature
Forest Lake, IL

Average temperature - Forest Lake, IL

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (27.7°F).

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.3°F).

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Average pressure
Forest Lake, IL

Average pressure - Forest Lake, IL

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Forest Lake, IL

Average wind speed - Forest Lake, IL

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity
Forest Lake, IL

Average humidity - Forest Lake, IL

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).

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Average rainfall
Forest Lake, IL

Average rainfall - Forest Lake, IL

The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is November (1.61").

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Average rainfall days
Forest Lake, IL

Average rainfall days - Forest Lake, IL

The month with the highest number of rainy days is May (20 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall
Forest Lake, IL

Average snowfall - Forest Lake, IL

The month with the highest snowfall is February (6.22").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Forest Lake, IL

Average snowfall days - Forest Lake, IL

The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Forest Lake, IL

Average daylight / Average sunshine - Forest Lake, IL

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days
Forest Lake, IL

Average sunshine days - Forest Lake, IL

The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is June (8.4 days).

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Average visibility
Forest Lake, IL

Average visibility - Forest Lake, IL

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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Forest Lake, Illinois, USA

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