December weather forecast
De Kalb, MO

Share

Weather in December

December, the first month of the winter in De Kalb, is also an icy month, with an average temperature ranging between max 39.4°F (4.1°C) and min 25.9°F (-3.4°C).

Temperature

De Kalb's December weather comes with a decrease in average high-temperatures, moving from a cool 51.6°F (10.9°C) in November to an icy 39.4°F (4.1°C). De Kalb, in December, witnesses an average low-temperature of 25.9°F (-3.4°C).

Humidity

The average relative humidity in December is 74%.

Rainfall

In December, the rain falls for 5.2 days. Throughout December, 0.87" (22mm) of precipitation is accumulated. Throughout the year, there are 125.3 rainfall days, and 23.94" (608mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In De Kalb, during December, snow falls for 3.9 days and regularly aggregates up to 1.1" (28mm) of snow. In De Kalb, during the entire year, snow falls for 19.9 days and aggregates up to 7.87" (200mm) of snow.

Daylight

With an average of 9h and 24min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:56 pm. On the last day of December, sunrise is at 7:40 am and sunset at 5:05 pm CST.

Sunshine

The average sunshine in December is 5.5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In December, the maximum UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.

Frequently asked questions

How cold is December?

In De Kalb, in December, the average high-temperature is 39.4°F (4.1°C), and the average low-temperature is 25.9°F (-3.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in August is evaluated at 93.2°F (34°C).

What is the average humidity in December?

The average relative humidity in December is 74%.

How many days does it rain in December?

In December, the rain falls for 5.2 days. Throughout December, 0.87" (22mm) of precipitation is accumulated.

How much does it snow in December?

In De Kalb, in December, snow falls for 3.9 days, with typically accumulated 1.1" (28mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 24min of daylight.

How many hours of daylight does De Kalb have in December?

In December, the average day length is 9h and 26min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:21 am and sunset at 4:56 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 5:05 pm CST.

How many hours of sunshine does De Kalb have in December?

In De Kalb, the average sunshine duration in December is 5.5h.

When is the lowest UV index in De Kalb?

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

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat 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
De Kalb, MO

Average temperature in December - De Kalb, MO
  • Average high temperature in December: 39.4°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in December: 25.9°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in December
De Kalb, MO

Average pressure in December - De Kalb, MO
  • 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 (29.88"Hg).

Average wind speed in December
De Kalb, MO

Average wind speed in December - De Kalb, MO
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

Average humidity in December
De Kalb, MO

Average humidity in December - De Kalb, MO
  • Average humidity in December: 74%

The months with the highest relative humidity are May and June (78%).
The months with the lowest relative humidity are October and November (69%).

Average rainfall in December
De Kalb, MO

Average rainfall in December - De Kalb, MO
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is May (3.58").
The driest month (with the least rainfall) is January (0.79").

Average rainfall days in December
De Kalb, MO

Average rainfall days in December - De Kalb, MO
  • Average rainfall days in December: 5.2 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is January (3.7 days).

Average snowfall in December
De Kalb, MO

Average snowfall in December - De Kalb, MO
  • Average snowfall in December: 1.1"

The month with the highest snowfall is February (2.56").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in December
De Kalb, MO

Average snowfall days in December - De Kalb, MO
  • Average snowfall days in December: 3.9 days

The month with the highest number of snowfall days is February (5.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
De Kalb, MO

Average daylight in December / Average sunshine in December - De Kalb, MO
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in December: 5h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

Average sunshine days in December
De Kalb, MO

Average sunshine days in December - De Kalb, MO
  • Average sunshine days in December: 22.4 days

The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (12.6 days).

Average UV index in December
De Kalb, MO

Average UV index in December - De Kalb, MO
  • 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).

Average cloud cover in December
De Kalb, MO

Average cloud cover in December - De Kalb, MO
  • Average cloud cover in December: 41

The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 27).

Average visibility in December
De Kalb, MO

Average visibility in December - De Kalb, MO
  • 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).

De Kalb, Missouri, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location