December weather forecast
Decatur, AL

Weather in December

The first month of the winter, December, is still a cool month in Decatur, Alabama, with an average temperature fluctuating between 51.6°F (10.9°C) and 38.3°F (3.5°C).

Temperature

In Decatur, the average high-temperature in December slightly decreases from a moderate 59.5°F (15.3°C) in November to a fresh 51.6°F (10.9°C). In December, the average low-temperature is 38.3°F (3.5°C).

Humidity

December is the most humid month in Decatur, with an average relative humidity of 79%.

Rainfall

The month with the most rainfall is December, when the rain falls for 13.3 days and typically aggregates up to 4.45" (113mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Decatur. In Decatur, snow falls for 1.5 days, with typically accumulated 0.35" (9mm) of snow. In Decatur, during the entire year, snow falls for 7.4 days and aggregates up to 1.77" (45mm) of snow.

Daylight

With an average of 9h and 53min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:36 am and sunset at 4:37 pm. On the last day of December, sunrise is at 6:54 am and sunset at 4:47 pm CST.

Sunshine

In December, the average sunshine is 4.8h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.
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. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the most humid month in Decatur?

With an average relative humidity of 79%, December is the most humid month in Decatur.

What is the average humidity in December in Decatur?

The average relative humidity in December in Decatur is 79%.

What is the wettest month in Decatur?

The month with the most rainfall is December, when the rain falls for 13.3 days and typically aggregates up to 4.45" (113mm) of precipitation.

How much does it rain in Decatur in December?

In Decatur, Alabama, in December, during 13.3 rainfall days, 4.45" (113mm) of precipitation is typically accumulated.

How much does it snow in Decatur in December?

In December, in Decatur, it is snowing for 1.5 days. Throughout December, 0.35" (9mm) of snow is accumulated.

What is the month with the shortest days in Decatur?

With an average of 9h and 53min of daylight, December has the shortest days of the year in Decatur, Alabama.

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

The average day length in December in Decatur is 9h and 53min.

What time are sunrise and sunset in December in Decatur?

On the first day of December, sunrise is at 6:36 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 4:47 pm CST.

How many hours of sunshine does Decatur have in December?

In December, the average sunshine duration in Decatur, Alabama, is 4.8h.

What is the month with the lowest UV index in Decatur?

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

What is the UV index intensity in December in Decatur?

In December, the average daily maximum UV index in Decatur is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Decatur, AL

Average temperature in December - Decatur, AL
  • Average high temperature in December: 51.6°F

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (47.5°F).

  • Average low temperature in December: 38.3°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

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Average pressure in December
Decatur, AL

Average pressure in December - Decatur, AL
  • Average pressure in December: 30.15"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed in December
Decatur, AL

Average wind speed in December - Decatur, AL
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

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Average humidity in December
Decatur, AL

Average humidity in December - Decatur, AL
  • Average humidity in December: 79%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in December
Decatur, AL

Average rainfall in December - Decatur, AL
  • Average rainfall in December: 4.45"

The wettest month (with the highest rainfall) is December (4.45").
The driest months (with the least rainfall) are September and November (2.48").

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Average rainfall days in December
Decatur, AL

Average rainfall days in December - Decatur, AL
  • Average rainfall days in December: 13.3 days

The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.4 days).

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Average snowfall in December
Decatur, AL

Average snowfall in December - Decatur, AL
  • Average snowfall in December: 0.35"

The months with the highest snowfall are January and February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in December
Decatur, AL

Average snowfall days in December - Decatur, AL
  • Average snowfall days in December: 1.5 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in December / Average sunshine in December - Decatur, AL
  • Average daylight in December: 9h and 53min

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

  • Average sunshine in December: 4h and 48min

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

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Average sunshine days in December
Decatur, AL

Average sunshine days in December - Decatur, AL
  • Average sunshine days in December: 15.5 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index in December
Decatur, AL

Average UV index in December - Decatur, AL
  • 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 and December (UV index 2).

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Average cloud cover in December
Decatur, AL

Average cloud cover in December - Decatur, AL
  • Average cloud cover in December: 49

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).

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Average visibility in December
Decatur, AL

Average visibility in December - Decatur, AL
  • 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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