October weather forecast
Green Rock, IL

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Weather in October

October, the same as September, is another enjoyable autumn month in Green Rock, Illinois, with an average temperature ranging between max 61.3°F (16.3°C) and min 45°F (7.2°C).

Temperature

Green Rock's progression into October involves a drop in the average high-temperature, receding from a warm 75.4°F (24.1°C) in September to a refreshing 61.3°F (16.3°C). October nights in Green Rock are marked by an average low-temperature of 45°F (7.2°C).

Humidity

With an average relative humidity of 71%, October is the least humid month.

Rainfall

In Green Rock, in October, it is raining for 8.4 days, with typically 0.71" (18mm) of accumulated precipitation. In Green Rock, during the entire year, the rain falls for 99.4 days and collects up to 9.57" (243mm) of precipitation.

Snowfall

January through April, September through December are months with snowfall. In October, it is snowing for 0.6 days. Throughout October, 0.31" (8mm) of snow is accumulated. Throughout the year, in Green Rock, there are 24.5 snowfall days, and 4.09" (104mm) of snow is accumulated.

Daylight

In October, the average length of the day is 11h and 5min.
On the first day of October, sunrise is at 6:59 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:57 pm CDT.

Sunshine

In October, the average sunshine in Green Rock is 5.5h.

UV index

The average daily maximum UV index in October is 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in October interprets into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Experience reduced UV exposure by about half when donning a wide-brim hat. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are October temperatures?

In Green Rock, 61.3°F (16.3°C) is the average high-temperature and 45°F (7.2°C) is the average low-temperature during October. In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 86°F (30°C).

What is the least humid month?

With an average relative humidity of 71%, October is the least humid month.

What is the average humidity in October?

In Green Rock, the average relative humidity in October is 71%.

How many days does it rain in October in Green Rock?

In Green Rock, in October, during 8.4 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How much does it snow in October?

In Green Rock, during October, snow falls for 0.6 days and regularly aggregates up to 0.31" (8mm) of snow.

What is the average length of the day in October?

In October, the average day length is 11h and 5min.

When are sunrise and sunset in October?

On the first day of October, sunrise is at 6:59 am and sunset at 6:42 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:57 pm CDT.

How many hours of sunshine does Green Rock have in October?

In Green Rock, the average sunshine duration in October is 5.5h.

What is the UV index intensity in October?

In Green Rock, the average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Green Rock, IL

Average temperature in October - Green Rock, IL
  • Average high temperature in October: 61.3°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in October: 45°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.4°F).

Average pressure in October
Green Rock, IL

Average pressure in October - Green Rock, IL
  • Average pressure in October: 30.01"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in October
Green Rock, IL

Average wind speed in October - Green Rock, IL
  • Average wind speed in October: 9.5mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

Average humidity in October
Green Rock, IL

Average humidity in October - Green Rock, IL
  • Average humidity in October: 71%

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in October
Green Rock, IL

Average rainfall in October - Green Rock, IL
  • Average rainfall in October: 0.71"

The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.35").

Average rainfall days in October
Green Rock, IL

Average rainfall days in October - Green Rock, IL
  • Average rainfall days in October: 8.4 days

The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is January (3.2 days).

Average snowfall in October
Green Rock, IL

Average snowfall in October - Green Rock, IL
  • Average snowfall in October: 0.31"

The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July and August (0").

Average snowfall days in October
Green Rock, IL

Average snowfall days in October - Green Rock, IL
  • Average snowfall days in October: 0.6 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are May, June, July and August (0 days).

Average daylight in October /
Average sunshine in October
Green Rock, IL

Average daylight in October / Average sunshine in October - Green Rock, IL
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in October: 5h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

Average sunshine days in October
Green Rock, IL

Average sunshine days in October - Green Rock, IL
  • Average sunshine days in October: 21.3 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (14.4 days).

Average UV index in October
Green Rock, IL

Average UV index in October - Green Rock, IL
  • Average UV index in October: 2

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in October
Green Rock, IL

Average cloud cover in October - Green Rock, IL
  • Average cloud cover in October: 39

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in October
Green Rock, IL

Average visibility in October - Green Rock, 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).

Green Rock, Illinois, USA

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