Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With the arrival of December, Rock Run experiences a modest decline in average high-temperatures, transitioning from a refreshing 61.2°F (16.2°C) in November to a cool 54.1°F (12.3°C). The low-temperature average for Rock Run during December stands at a cold 38.5°F (3.6°C).Humidity
The most humid month is December, with an average relative humidity of 80%.Rainfall
In Rock Run, 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
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.6 snowfall days, it receives 0.47" (12mm) of snow. Throughout the year, there are 4.2 snowfall days, and 1.54" (39mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of December, sunrise is at 6:29 am and sunset at 4:32 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 4:43 pm CST.
Sunshine
The average sunshine in December is 4.9h.UV index
With an average maximum UV index of 2, December is the month with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 in December translates into these instructions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Rock Run have in December?
When is the lowest UV index?
How high is the UV index in December?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Rock Run, Alabama, USA
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