October weather forecast
Byron, IL

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Weather in October

October, like September, is another refreshing autumn month in Byron, Illinois, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 43.7°F (6.5°C).

Temperature

Byron's October weather shows a moderate shift in high-temperatures, falling from September's agreeable 72.7°F (22.6°C) to a mild 59.5°F (15.3°C). Nighttime temperature in Byron, Illinois, lowers to an average of 43.7°F (6.5°C) in October.

Humidity

April and October, with an average relative humidity of 75%, are the least humid months.

Rainfall

In October, the rain falls for 7.7 days. Throughout October, 0.67" (17mm) of precipitation is accumulated. In Byron, during the entire year, the rain falls for 100.6 days and collects up to 7.99" (203mm) of precipitation.

Snowfall

Months with snowfall in Byron are January through April, October through December. October is the first month it typically snows. Throughout October, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 29.5 snowfall days, and 3.66" (93mm) of snow is accumulated.

Daylight

In October, the average length of the day in Byron is 11h and 4min.
On the first day of the month, sunrise is at 6:54 am and sunset at 6:38 pm. On the last day of October, sunrise is at 7:29 am and sunset at 5:51 pm CDT.

Sunshine

The average sunshine in October in Byron is 5.3h.

UV index

In Byron, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In October, a regular UV index of 2 translates into these guidelines:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
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Frequently asked questions

What is the average October temperature in Byron?

In Byron, 59.5°F (15.3°C) is the average high-temperature and 43.7°F (6.5°C) is the average low-temperature during October.

What is the least humid month in Byron?

The months with the lowest humidity in Byron, Illinois, are April and October, with an average relative humidity of 75%.

What is the average humidity in October in Byron?

The average relative humidity in October is 75%.

How many days does it rain in October in Byron?

In Byron, in October, during 7.7 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

When does it start to snow in Byron?

October is the first month it typically snows in Byron. Throughout October, in the average 0.4 snowfall days, it receives 0.2" (5mm) of snow.

What is the average length of the day in October in Byron?

In Byron, the average day length in October is 11h and 4min.

When is the sunrise / sunset in October in Byron?

In October, on the first day of the month, sunrise is at 6:54 am and sunset at 6:38 pm. On the last day of the month, in Byron, sunrise is at 7:29 am and sunset at 5:51 pm CDT.

How many hours of sunshine does Byron have in October?

In Byron, Illinois, the average sunshine duration in October is 5.3h.

What is the UV index reading in October in Byron?

In Byron, Illinois, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Byron, IL

Average temperature in October - Byron, IL
  • Average high temperature in October: 59.5°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 (26.2°F).

  • Average low temperature in October: 43.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14°F).

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Average pressure in October
Byron, IL

Average pressure in October - Byron, IL
  • Average pressure in October: 30"Hg

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in October
Byron, IL

Average wind speed in October - Byron, IL
  • Average wind speed in October: 8.9mph

The windiest month (with the highest average wind speed) is April (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in October
Byron, IL

Average humidity in October - Byron, IL
  • Average humidity in October: 75%

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April and October (75%).

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Average rainfall in October
Byron, IL

Average rainfall in October - Byron, IL
  • Average rainfall in October: 0.67"

The wettest month (with the highest rainfall) is May (1.18").
The driest months (with the least rainfall) are January and February (0.35").

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Average rainfall days in October
Byron, IL

Average rainfall days in October - Byron, IL
  • Average rainfall days in October: 7.7 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (3.2 days).

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Average snowfall in October
Byron, IL

Average snowfall in October - Byron, IL
  • Average snowfall in October: 0.2"

The month with the highest snowfall is January (1.42").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in October
Byron, IL

Average snowfall days in October - Byron, IL
  • Average snowfall days in October: 0.4 days

The month with the highest number of snowfall days is January (8.1 days).
The 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
Byron, IL

Average daylight in October / Average sunshine in October - Byron, 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 2min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in October
Byron, IL

Average sunshine days in October - Byron, IL
  • Average sunshine days in October: 21.7 days

The month with the most sunshine days is December (22.6 days).
The month with the least sunshine days is June (12.8 days).

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Average UV index in October
Byron, IL

Average UV index in October - Byron, IL
  • Average UV index in October: 2

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

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Average cloud cover in October
Byron, IL

Average cloud cover in October - Byron, IL
  • Average cloud cover in October: 42

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 33).

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Average visibility in October
Byron, IL

Average visibility in October - Byron, IL
  • Average visibility in October: 6mi

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

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Byron, Illinois, USA

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