December weather forecast
Decatur, TX

Share

Weather in December

December, the first month of the winter in Decatur, is still a cool month, with an average temperature varying between 39.4°F (4.1°C) and 54.3°F (12.4°C).

Temperature

As November transitions into December, Decatur sees a drop in the average high-temperature, transitioning from an enjoyable 63.5°F (17.5°C) to a cool 54.3°F (12.4°C). Decatur's nights in December experience an average temperature drop to a cold 39.4°F (4.1°C).

Humidity

In December, the average relative humidity in Decatur, Texas, is 67%.

Rainfall

In Decatur, Texas, in December, it is raining for 7.8 days, with typically 1.46" (37mm) of accumulated precipitation. In Decatur, Texas, during the entire year, the rain falls for 131.9 days and collects up to 28.31" (719mm) of precipitation.

Snowfall

Months with snowfall in Decatur are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.7 snowfall days, it receives 0.24" (6mm) of snow. In Decatur, during the entire year, snow falls for 3.5 days and aggregates up to 1.69" (43mm) of snow.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of December in Decatur, Texas, sunrise is at 7:16 am and sunset at 5:22 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:33 pm CST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year in Decatur.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In December, the maximum UV index of 3 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take note! UV radiation from the Sun can double in intensity due to snow reflection.
[Resources]

Frequently asked questions

What is the average December temperature in Decatur?

An average high-temperature, in December, in Decatur, is 54.3°F (12.4°C) and the average low-temperature is 39.4°F (4.1°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, is computed to be 93.2°F (34°C).

What is the average humidity in December in Decatur?

The average relative humidity in December in Decatur, Texas, is 67%.

How much does it rain in Decatur in December?

In December, in Decatur, Texas, the rain falls for 7.8 days. Throughout December, 1.46" (37mm) of precipitation is accumulated.

When does it start to snow in Decatur?

December is the first month it typically snows. Throughout December, in the average 0.7 snowfall days, it receives 0.24" (6mm) of snow.

What is the month with the shortest days in Decatur?

December has the shortest days of the year in Decatur, Texas, with an average of 10h and 0min of daylight.

How many hours of daylight does Decatur have in December?

In Decatur, the average day length in December is 10h and 0min.

What time are sunrise and sunset in December in Decatur?

In December, on the first day of the month, sunrise is at 7:16 am and sunset at 5:22 pm. On the last day of the month, in Decatur, sunrise is at 7:33 am and sunset at 5:33 pm CST.

What is the month with the least sunshine in Decatur?

With an average of 5.9h of sunshine, December has the least sunshine of the year in Decatur, Texas.

How long on average sun shines in December in Decatur?

In Decatur, the average sunshine duration in December is 5.9h.

What are the months with the lowest UV index in Decatur?

The months with the lowest UV index are January and December, with an average maximum UV index of 3.

What is the UV index reading in December in Decatur?

In December, the average daily maximum UV index in Decatur, Texas, is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
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 December
Decatur, TX

Average temperature in December - Decatur, TX
  • Average high temperature in December: 54.3°F

The warmest month (with the highest average high temperature) is August (95.2°F).
The month with the lowest average high temperature is January (54°F).

  • Average low temperature in December: 39.4°F

The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).

[Resources]

Average pressure in December
Decatur, TX

Average pressure in December - Decatur, TX
  • 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 (29.89"Hg).

[Resources]

Average wind speed in December
Decatur, TX

Average wind speed in December - Decatur, TX
  • Average wind speed in December: 8.6mph

The windiest months (with the highest average wind speed) are March and April (10.7mph).
The calmest month (with the lowest average wind speed) is September (7mph).

[Resources]

Average humidity in December
Decatur, TX

Average humidity in December - Decatur, TX
  • Average humidity in December: 67%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).

[Resources]

Average rainfall in December
Decatur, TX

Average rainfall in December - Decatur, TX
  • Average rainfall in December: 1.46"

The wettest month (with the highest rainfall) is October (3.62").
The driest month (with the least rainfall) is January (1.34").

[Resources]

Average rainfall days in December
Decatur, TX

Average rainfall days in December - Decatur, TX
  • Average rainfall days in December: 7.8 days

The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.7 days).

[Resources]

Average snowfall in December
Decatur, TX

Average snowfall in December - Decatur, TX
  • Average snowfall in December: 0.24"

The month with the highest snowfall is February (1.14").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

[Resources]

Average snowfall days in December
Decatur, TX

Average snowfall days in December - Decatur, TX
  • Average snowfall days in December: 0.7 days

The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Decatur, TX

Average daylight in December / Average sunshine in December - Decatur, TX
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 5h and 5min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

[Resources]

Average sunshine days in December
Decatur, TX

Average sunshine days in December - Decatur, TX
  • Average sunshine days in December: 21.2 days

The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is May (13.5 days).

[Resources]

Average UV index in December
Decatur, TX

Average UV index in December - Decatur, TX
  • Average UV index in December: 3

The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).

[Resources]

Average cloud cover in December
Decatur, TX

Average cloud cover in December - Decatur, TX
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 18).

[Resources]

Average visibility in December
Decatur, TX

Average visibility in December - Decatur, TX
  • 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).

[Resources]

Decatur, Texas, USA

Weather forecast for your location

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