December weather forecast
Summerfield, IL

Weather in December

December, the first month of the winter in Summerfield, is also a wintry month, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 30.2°F (-1°C).

Temperature

In Summerfield, the average high-temperature in December decreases from a fresh 52.9°F (11.6°C) in November to a cold 42.3°F (5.7°C). In Summerfield, the average low-temperature is 30.2°F (-1°C).

Humidity

In December, the average relative humidity is 77%.

Rainfall

In Summerfield, in December, it is raining for 8.5 days, with typically 1.89" (48mm) of accumulated precipitation. In Summerfield, during the entire year, the rain falls for 151.1 days and collects up to 30.43" (773mm) of precipitation.

Snowfall

Months with snowfall in Summerfield are January through April, October through December. In December, in Summerfield, it is snowing for 4.5 days. Throughout December, 1.46" (37mm) of snow is accumulated. In Summerfield, during the entire year, snow falls for 22.4 days and aggregates up to 6.1" (155mm) of snow.

Daylight

With an average of 9h and 31min of daylight, December has the shortest days of the year in Summerfield.
On the first day of December in Summerfield, Illinois, sunrise is at 6:57 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:47 pm CST.

Sunshine

The average sunshine in December in Summerfield is 4.8h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Summerfield. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Summerfield?

In December, in Summerfield, Illinois, the average high-temperature is 42.3°F (5.7°C), and the average low-temperature is 30.2°F (-1°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is evaluated at 93.2°F (34°C).

What is the average humidity in December in Summerfield?

In December, the average relative humidity is 77%.

How many days does it rain in December in Summerfield?

In Summerfield, in December, it is raining for 8.5 days, with typically 1.89" (48mm) of accumulated precipitation.

How much does it snow in Summerfield in December?

In Summerfield, during December, snow falls for 4.5 days and regularly aggregates up to 1.46" (37mm) of snow.

What is the month with the shortest days in Summerfield?

December has the shortest days of the year in Summerfield, with an average of 9h and 31min of daylight.

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

In Summerfield, Illinois, the average day length in December is 9h and 31min.

What time are sunrise and sunset in December in Summerfield?

In December, on the first day of the month, sunrise is at 6:57 am and sunset at 4:38 pm. On the last day of the month, in Summerfield, sunrise is at 7:16 am and sunset at 4:47 pm CST.

How long on average sun shines in December in Summerfield?

In December, the average sunshine duration in Summerfield, Illinois, is 4.8h.

When is the lowest UV index in Summerfield?

The months with the lowest UV index in Summerfield, Illinois, are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in Summerfield?

In Summerfield, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unsafe 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
Summerfield, IL

Average temperature in December - Summerfield, IL
  • Average high temperature in December: 42.3°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in December: 30.2°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in December
Summerfield, IL

Average pressure in December - Summerfield, IL
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in December
Summerfield, IL

Average wind speed in December - Summerfield, IL
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in December
Summerfield, IL

Average humidity in December - Summerfield, IL
  • Average humidity in December: 77%

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in December
Summerfield, IL

Average rainfall in December - Summerfield, IL
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").

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Average rainfall days in December
Summerfield, IL

Average rainfall days in December - Summerfield, IL
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).

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Average snowfall in December
Summerfield, IL

Average snowfall in December - Summerfield, IL
  • Average snowfall in December: 1.46"

The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Summerfield, IL

Average snowfall days in December - Summerfield, IL
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.5 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
Summerfield, IL

Average daylight in December / Average sunshine in December - Summerfield, IL
  • Average daylight in December: 9h and 31min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 31min).

  • Average sunshine in December: 4h and 48min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

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Average sunshine days in December
Summerfield, IL

Average sunshine days in December - Summerfield, IL
  • Average sunshine days in December: 18 days

The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).

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Average UV index in December
Summerfield, IL

Average UV index in December - Summerfield, IL
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in December
Summerfield, IL

Average cloud cover in December - Summerfield, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).

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Average visibility in December
Summerfield, IL

Average visibility in December - Summerfield, IL
  • Average visibility in December: 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).

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