October weather forecast
Lake Forest, IL

Weather in October

October, like September, is a moderate autumn month in Lake Forest, Illinois, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 58.6°F (14.8°C).

Temperature

In Lake Forest, the average high-temperature decreases, from an agreeable 71.2°F (21.8°C) in September, to a moderate 58.6°F (14.8°C). In Lake Forest, in October, the average low-temperature is 47.7°F (8.7°C).

Humidity

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

Rainfall

In Lake Forest, in October, it is raining for 14.7 days, with typically 2.64" (67mm) of accumulated precipitation. Throughout the year, in Lake Forest, there are 154.1 rainfall days, and 30.24" (768mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Lake Forest, Illinois. October is the first month it typically snows in Lake Forest, Illinois. Throughout October, in the average 0.5 snowfall days, it receives 0.12" (3mm) of snow. Throughout the year, there are 42.9 snowfall days, and 13.82" (351mm) of snow is accumulated.

Daylight

In Lake Forest, the average length of the day in October is 11h.

Sunshine

In Lake Forest, the average sunshine in October is 5.7h.

UV index

In Lake Forest, Illinois, the average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a low health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In October, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the least humid month in Lake Forest?

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

What is the average humidity in October in Lake Forest?

The average relative humidity in October in Lake Forest is 73%.

How many days does it rain in October in Lake Forest?

In Lake Forest, Illinois, during October, the rain falls for 14.7 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When does it start to snow in Lake Forest?

October is the first month it typically snows in Lake Forest, Illinois. Throughout October, in the average 0.5 snowfall days, it receives 0.12" (3mm) of snow.

How many hours of daylight does Lake Forest have in October?

In Lake Forest, Illinois, the average length of the day in October is 11h.

How long on average sun shines in October in Lake Forest?

In October, the average sunshine is 5.7h.

What is the UV index reading in October in Lake Forest?

In Lake Forest, Illinois, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV rays.

Average temperature in October
Lake Forest, IL

Average temperature in October - Lake Forest, IL
  • Average high temperature in October: 58.6°F

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).

  • Average low temperature in October: 47.7°F

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 in October
Lake Forest, IL

Average pressure in October - Lake Forest, IL
  • Average pressure in October: 30"

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

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Average wind speed in October
Lake Forest, IL

Average wind speed in October - Lake Forest, IL
  • Average wind speed in October: 10.7mph

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 in October
Lake Forest, IL

Average humidity in October - Lake Forest, IL
  • Average humidity in October: 73%

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 in October
Lake Forest, IL

Average rainfall in October - Lake Forest, IL
  • Average rainfall in October: 2.64"

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 in October
Lake Forest, IL

Average rainfall days in October - Lake Forest, IL
  • Average rainfall days in October: 14.7 days

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 in October
Lake Forest, IL

Average snowfall in October - Lake Forest, IL
  • Average snowfall in October: 0.12"

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

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Average snowfall days in October
Lake Forest, IL

Average snowfall days in October - Lake Forest, IL
  • Average snowfall days in October: 0.5 days

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

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Average daylight in October /
Average sunshine in October
Lake Forest, IL

Average daylight in October / Average sunshine in October - Lake Forest, IL
  • Average daylight in October: 11h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in October: 5.7h

The month with the most sunshine is August (Average sunshine: 10.7h).
The month with the least sunshine is January (Average sunshine: 3.8h).

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Average sunshine days in October
Lake Forest, IL

Average sunshine days in October - Lake Forest, IL
  • Average sunshine days in October: 13.6 days

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 UV index in October
Lake Forest, IL

Average UV index in October - Lake Forest, IL
  • Average UV index in October: 2

Months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in October
Lake Forest, IL

Average cloud cover in October - Lake Forest, IL
  • Average cloud cover in October: 42

The month with the most cloud cover is January (Cloud cover 61).
Months with the least cloud cover are July and August (Cloud cover 27).

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Average visibility in October
Lake Forest, IL

Average visibility in October - Lake Forest, IL
  • Average visibility in October: 6mi

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

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