Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
The start of October comes with a reduction in the average high-temperature, receding from a pleasant 72.3°F (22.4°C) in September to a moderate 59°F (15°C). Throughout October, Grayslake encounters an average temperature drop to a frosty 45.1°F (7.3°C).Humidity
October is the least humid month in Grayslake, with an average relative humidity of 74%.Rainfall
In October, the rain falls for 13.2 days. Throughout October, 1.89" (48mm) of precipitation is accumulated. In Grayslake, during the entire year, the rain falls for 142.3 days and collects up to 21.97" (558mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.28" (7mm) of snow. Throughout the year, there are 49.5 snowfall days, and 13.54" (344mm) of snow is accumulated.Daylight
In Grayslake, the average length of the day in October is 11h and 3min.On the first day of the month, sunrise is at 6:50 am and sunset at 6:33 pm. On the last day of October, sunrise is at 7:25 am and sunset at 5:46 pm CDT.
Sunshine
In October, the average sunshine is 5.5h.UV index
In Grayslake, the average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: An average UV index of 2 in October transforms into this advice:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are October temperatures?
What is the least humid month in Grayslake?
What is the average humidity in October?
How many days does it rain in October?
When does it start snowing?
How many hours of daylight does Grayslake have in October?
When are sunrise and sunset in October?
How long on average sun shines in October?
What is the UV index reading in October in Grayslake?
Average temperature in October
Grayslake, IL
- Average high temperature in October: 59°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (27.5°F).
- Average low temperature in October: 45.1°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in October
Grayslake, IL
- Average pressure in October: 30"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
Grayslake, IL
- Average wind speed in October: 9.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in October
Grayslake, IL
- Average humidity in October: 74%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in October
Grayslake, IL
- Average rainfall in October: 1.89"
The wettest month (with the highest rainfall) is April (2.72").
The driest month (with the least rainfall) is December (0.98").
Average rainfall days in October
Grayslake, IL
- Average rainfall days in October: 13.2 days
The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is February (5 days).
Average snowfall in October
Grayslake, IL
- Average snowfall in October: 0.28"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
Grayslake, IL
- Average snowfall days in October: 0.5 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
Grayslake, IL
- Average daylight in October: 11h and 0min
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 6min).
- Average sunshine in October: 5h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in October
Grayslake, IL
- Average sunshine days in October: 14.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in October
Grayslake, IL
- Average UV index in October: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in October
Grayslake, IL
- Average cloud cover in October: 44
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 30).
Average visibility in October
Grayslake, IL
- Average visibility in October: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Grayslake, Illinois, USA
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