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 involves a temperature drop, moving from an agreeable 72.1°F (22.3°C) in September to a refreshing 59.9°F (15.5°C). Throughout the month of October, River Forest sees a steady low-temperature average of 47.8°F (8.8°C).Humidity
With an average relative humidity of 72%, October is the least humid month.Rainfall
In October, the rain falls for 13.6 days. Throughout October, 2.68" (68mm) of precipitation is accumulated. Throughout the year, there are 157.8 rainfall days, and 33.7" (856mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in River Forest. October is the first month it typically snows in River Forest. Throughout October, in the average 0.2 snowfall days, it receives 0.31" (8mm) of snow. In River Forest, during the entire year, snow falls for 40.3 days and aggregates up to 16.81" (427mm) of snow.Daylight
The average length of the day in October is 11h and 4min.On the first day of October in River Forest, Illinois, sunrise is at 6:48 am and sunset at 6:32 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:46 pm CDT.
Sunshine
The average sunshine in October is 5.8h.UV index
The average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In October, a daily UV index of 2 turns into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What is the usual temperature for River Forest in October?
What is the least humid month in River Forest?
What is the average humidity in October in River Forest?
How much does it rain in River Forest in October?
When does it start to snow in River Forest?
What is the average length of the day in October in River Forest?
When is the sunrise / sunset in October in River Forest?
How many hours of sunshine does River Forest have in October?
What is the UV index intensity in October in River Forest?
Average temperature in October
River Forest, IL
- Average high temperature in October: 59.9°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).
- Average low temperature in October: 47.8°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in October
River Forest, IL
- Average pressure in October: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in October
River Forest, IL
- Average wind speed in October: 10.1mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in October
River Forest, IL
- Average humidity in October: 72%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (72%).
Average rainfall in October
River Forest, IL
- Average rainfall in October: 2.68"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.57").
Average rainfall days in October
River Forest, IL
- Average rainfall days in October: 13.6 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in October
River Forest, IL
- Average snowfall in October: 0.31"
The month with the highest snowfall is February (4.69").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in October
River Forest, IL
- Average snowfall days in October: 0.2 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in October /
Average sunshine in October
River Forest, IL
- Average daylight in October: 11h and 1min
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).
- Average sunshine in October: 5h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in October
River Forest, IL
- Average sunshine days in October: 15.1 days
The month with the most sunshine days is December (16.7 days).
The month with the least sunshine days is July (9.9 days).
Average UV index in October
River Forest, IL
- Average UV index in October: 2
The months with the highest UV index are June, 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
River Forest, IL
- Average cloud cover in October: 42
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in October
River Forest, IL
- Average visibility in October: 6mi
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).
River Forest, Illinois, USA
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