December weather forecast
Ashton, IL

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Weather in December

December, the first month of the winter in Ashton, is also a wintry month, with an average temperature varying between 22.8°F (-5.1°C) and 32.9°F (0.5°C).

Temperature

The onset of December is marked by a decrease in temperature, transitioning from a chilly 45.3°F (7.4°C) in November to a cold 32.9°F (0.5°C). Ashton witnesses a consistent average low-temperature of 22.8°F (-5.1°C) throughout December.

Humidity

In Ashton, the average relative humidity in December is 83%.

Rainfall

In Ashton, Illinois, in December, during 6.2 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 124.5 rainfall days, and 14.49" (368mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 7.7 days. Throughout December, 0.87" (22mm) of snow is accumulated. Throughout the year, there are 37.1 snowfall days, and 6.14" (156mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of December in Ashton, Illinois, sunrise is at 7:05 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:36 pm CST.

Sunshine

In December, the average sunshine in Ashton is 3.9h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 1 during December leads to these instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

How cold is it in Ashton in December?

December temperatures vary between a high-temperature of 32.9°F (0.5°C) and a low-temperature of 22.8°F (-5.1°C).

What is the average humidity in December in Ashton?

In December, the average relative humidity in Ashton, Illinois, is 83%.

How much does it rain in Ashton in December?

In December, in Ashton, the rain falls for 6.2 days. Throughout December, 0.71" (18mm) of precipitation is accumulated.

How much does it snow in Ashton in December?

In Ashton, Illinois, in December, during 7.7 snowfall days, 0.87" (22mm) of snow is typically accumulated.

What is the month with the shortest days in Ashton?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

What is the average length of the day in December in Ashton?

The average day length in December in Ashton is 9h and 11min.

When are sunrise and sunset in December in Ashton?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:26 pm. On the last day of the month, in Ashton, sunrise is at 7:24 am and sunset at 4:36 pm CST.

How many hours of sunshine does Ashton have in December?

In December, the average sunshine duration is 3.9h.

When is the lowest UV index in Ashton?

The months with the lowest UV index in Ashton are January and December, with an average maximum UV index of 1.

What is the UV index intensity in December in Ashton?

In Ashton, the average daily maximum UV index in December is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
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 December
Ashton, IL

Average temperature in December - Ashton, IL
  • Average high temperature in December: 32.9°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°F).

  • Average low temperature in December: 22.8°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 (14.7°F).

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Average pressure in December
Ashton, IL

Average pressure in December - Ashton, IL
  • Average pressure in December: 30.1"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 December
Ashton, IL

Average wind speed in December - Ashton, IL
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in December
Ashton, IL

Average humidity in December - Ashton, IL
  • Average humidity in December: 83%

The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (74%).

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Average rainfall in December
Ashton, IL

Average rainfall in December - Ashton, IL
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.55").

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Average rainfall days in December
Ashton, IL

Average rainfall days in December - Ashton, IL
  • Average rainfall days in December: 6.2 days

The month with the highest number of rainy days is June (16 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in December
Ashton, IL

Average snowfall in December - Ashton, IL
  • Average snowfall in December: 0.87"

The month with the highest snowfall is January (2.2").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Ashton, IL

Average snowfall days in December - Ashton, IL
  • Average snowfall days in December: 7.7 days

The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Ashton, IL

Average daylight in December / Average sunshine in December - Ashton, IL
  • Average daylight in December: 9h 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 December: 3h and 5min

The month with the most sunshine is June (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in December
Ashton, IL

Average sunshine days in December - Ashton, IL
  • Average sunshine days in December: 18.4 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (10.9 days).

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Average UV index in December
Ashton, IL

Average UV index in December - Ashton, IL
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in December
Ashton, IL

Average cloud cover in December - Ashton, IL
  • Average cloud cover in December: 59

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is September (Cloud cover 34).

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Average visibility in December
Ashton, IL

Average visibility in December - Ashton, IL
  • Average visibility in December: 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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Ashton, Illinois, USA

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