December weather forecast
Valmeyer, IL

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Weather in December

December, the first month of the winter in Valmeyer, is also a frosty month, with an average temperature ranging between max 43.2°F (6.2°C) and min 30.9°F (-0.6°C).

Temperature

A shift in the average high-temperature occurs in December, reducing from a fresh 53.6°F (12°C) in November to a chilly 43.2°F (6.2°C). Nighttime temperature dips to a mean of 30.9°F (-0.6°C) during December.

Humidity

The average relative humidity in December is 76%.

Rainfall

In Valmeyer, in December, during 8.1 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Valmeyer, during the entire year, the rain falls for 139.8 days and collects up to 25.63" (651mm) of precipitation.

Snowfall

Months with snowfall are January through March, September, November and December. In Valmeyer, in December, during 3.5 snowfall days, 1.54" (39mm) of snow is typically accumulated. Throughout the year, there are 18.7 snowfall days, and 6.65" (169mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 6:59 am and sunset at 4:41 pm. On the last day of December, sunrise is at 7:17 am and sunset at 4:51 pm CST.

Sunshine

The average sunshine in December is 5h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 2 in December transforms into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Updated: Jun 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is December cold?

December temperatures vary between a high-temperature of 43.2°F (6.2°C) and a low-temperature of 30.9°F (-0.6°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in August is appraised at 95°F (35°C).

What is the average humidity in December?

In Valmeyer, the average relative humidity in December is 76%.

How many days does it rain in December?

In Valmeyer, in December, during 8.1 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

How many days does it snow in December?

In December, it is snowing for 3.5 days. Throughout December, 1.54" (39mm) of snow is accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

How many hours of daylight does Valmeyer have in December?

The average day length in December is 9h and 33min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:59 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:51 pm CST.

How long on average sun shines in December?

In Valmeyer, the average sunshine duration in December is 5h.

What is the month with the lowest UV index?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index intensity in December?

In Valmeyer, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to 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 December
Valmeyer, IL

Average temperature in December - Valmeyer, IL
  • Average high temperature in December: 43.2°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.3°F).

  • Average low temperature in December: 30.9°F

The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in December
Valmeyer, IL

Average pressure in December - Valmeyer, 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 (29.92"Hg).

Average wind speed in December
Valmeyer, IL

Average wind speed in December - Valmeyer, IL
  • Average wind speed in December: 8.5mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

Average humidity in December
Valmeyer, IL

Average humidity in December - Valmeyer, IL
  • Average humidity in December: 76%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Valmeyer, IL

Average rainfall in December - Valmeyer, IL
  • Average rainfall in December: 1.77"

The wettest month (with the highest rainfall) is May (3.19").
The driest months (with the least rainfall) are February and November (1.34").

Average rainfall days in December
Valmeyer, IL

Average rainfall days in December - Valmeyer, IL
  • Average rainfall days in December: 8.1 days

The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (6.3 days).

Average snowfall in December
Valmeyer, IL

Average snowfall in December - Valmeyer, IL
  • Average snowfall in December: 1.54"

The month with the highest snowfall is January (1.89").
The months with the least snowfall are April, May, June, July, August and October (0").

Average snowfall days in December
Valmeyer, IL

Average snowfall days in December - Valmeyer, IL
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August and October (0 days).

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

Average daylight in December / Average sunshine in December - Valmeyer, IL
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 5h and 0min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

Average sunshine days in December
Valmeyer, IL

Average sunshine days in December - Valmeyer, IL
  • Average sunshine days in December: 20.4 days

The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is July (12.5 days).

Average UV index in December
Valmeyer, IL

Average UV index in December - Valmeyer, 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 and December (UV index 2).

Average cloud cover in December
Valmeyer, IL

Average cloud cover in December - Valmeyer, IL
  • Average cloud cover in December: 47

The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are June and August (Cloud cover 27).

Average visibility in December
Valmeyer, IL

Average visibility in December - Valmeyer, 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).

Valmeyer, Illinois, USA

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