December weather forecast
Rock Run, AL

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Weather in December

December, the first month of the winter in Rock Run, is also a fresh month, with an average temperature fluctuating between 38.5°F (3.6°C) and 54.1°F (12.3°C).

Temperature

The start of December signals a gentle decrease in the average high-temperature, transitioning from a comfortable 61.2°F (16.2°C) in November to a cool 54.1°F (12.3°C). An average low-temperature of 38.5°F (3.6°C) is common in Rock Run during the nights of December.

Humidity

With an average relative humidity of 80%, December is the most humid month.

Rainfall

In Rock Run, Alabama, in December, it is raining for 12.2 days, with typically 2.4" (61mm) of accumulated precipitation. Throughout the year, there are 154.5 rainfall days, and 25.04" (636mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through March and December. December is the first month it typically snows in Rock Run. Throughout December, in the average 0.6 snowfall days, it receives 0.47" (12mm) of snow. In Rock Run, during the entire year, snow falls for 4.2 days and aggregates up to 1.54" (39mm) of snow.

Daylight

With an average of 9h and 54min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:29 am and sunset at 4:32 pm. On the last day of December, sunrise is at 6:47 am and sunset at 4:43 pm CST.

Sunshine

In December, the average sunshine is 4.9h.

UV index

The month with the lowest UV index in Rock Run, Alabama, is December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high UV index of 2 in December translates into the following recommendations:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
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Frequently asked questions

What is the temperature in December in Rock Run?

The high-temperature in Rock Run, Alabama, during December is 54.1°F (12.3°C) and the low-temperature is 38.5°F (3.6°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 91.4°F (33°C).

What is the most humid month in Rock Run?

With an average relative humidity of 80%, December is the most humid month in Rock Run, Alabama.

What is the average humidity in December in Rock Run?

The average relative humidity in December in Rock Run is 80%.

How many days does it rain in December in Rock Run?

In Rock Run, Alabama, during December, the rain falls for 12.2 days and regularly aggregates up to 2.4" (61mm) of precipitation.

When does it start to snow in Rock Run?

December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 0.47" (12mm) of snow.

What is the month with the shortest days in Rock Run?

December has the shortest days of the year in Rock Run, with an average of 9h and 54min of daylight.

What is the average length of the day in December in Rock Run?

In December, the average day length in Rock Run is 9h and 56min.

When is the sunrise / sunset in December in Rock Run?

In December, on the first day of the month, sunrise is at 6:29 am and sunset at 4:32 pm. On the last day of the month, in Rock Run, sunrise is at 6:47 am and sunset at 4:43 pm CST.

How long on average sun shines in December in Rock Run?

In December, the average sunshine duration in Rock Run is 4.9h.

When is the lowest UV index in Rock Run?

With an average maximum UV index of 2, December is the month with the lowest UV index in Rock Run, Alabama.

What is the UV index intensity in December in Rock Run?

In Rock Run, Alabama, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
Rock Run, AL

Average temperature in December - Rock Run, AL
  • Average high temperature in December: 54.1°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (49.8°F).

  • Average low temperature in December: 38.5°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (33.8°F).

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Average pressure in December
Rock Run, AL

Average pressure in December - Rock Run, 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
Rock Run, AL

Average wind speed in December - Rock Run, AL
  • Average wind speed in December: 6.6mph

The windiest month (with the highest average wind speed) is February (7.2mph).
The calmest month (with the lowest average wind speed) is August (4mph).

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Average humidity in December
Rock Run, AL

Average humidity in December - Rock Run, AL
  • Average humidity in December: 80%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in December
Rock Run, AL

Average rainfall in December - Rock Run, AL
  • Average rainfall in December: 2.4"

The wettest month (with the highest rainfall) is August (2.56").
The driest month (with the least rainfall) is October (1.38").

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Average rainfall days in December
Rock Run, AL

Average rainfall days in December - Rock Run, AL
  • Average rainfall days in December: 12.2 days

The month with the highest number of rainy days is July (20.1 days).
The month with the least rainy days is November (7.9 days).

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Average snowfall in December
Rock Run, AL

Average snowfall in December - Rock Run, AL
  • Average snowfall in December: 0.47"

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

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Average snowfall days in December
Rock Run, AL

Average snowfall days in December - Rock Run, AL
  • Average snowfall days in December: 0.6 days

The month with the highest number of snowfall days is February (1.5 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
Rock Run, AL

Average daylight in December / Average sunshine in December - Rock Run, AL
  • Average daylight in December: 9h and 5min

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

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in December
Rock Run, AL

Average sunshine days in December - Rock Run, AL
  • Average sunshine days in December: 17 days

The months with the most sunshine days are October and November (20.1 days).
The month with the least sunshine days is July (8.9 days).

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Average UV index in December
Rock Run, AL

Average UV index in December - Rock Run, AL
  • Average UV index in December: 2

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

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Average cloud cover in December
Rock Run, AL

Average cloud cover in December - Rock Run, AL
  • Average cloud cover in December: 47

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is June (Cloud cover 30).

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Average visibility in December
Rock Run, AL

Average visibility in December - Rock Run, AL
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).

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Rock Run, Alabama, USA

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