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
A moderate decline in average high-temperatures is noted in December, moving from a pleasant 68.2°F (20.1°C) in November to an enjoyable 62.8°F (17.1°C). Throughout December, Summerdale's nights cool down to an average of 50.9°F (10.5°C).Humidity
February and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Summerdale, in December, during 9.2 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 130.4 rainfall days, and 13.7" (348mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
December has the shortest days of the year, with an average of 10h and 12min of daylight.On the first day of December, sunrise is at 6:30 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 5:00 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 5.5h of sunshine.UV index
January, February and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index, 4 during December, leads to the following recommendations:
Exercise prevention - Warding off sunburn is urged. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
Does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Summerdale have in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Summerdale, AL
- Average high temperature in December: 62.8°F
The warmest month (with the highest average high temperature) is August (89.1°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in December: 50.9°F
The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in December
Summerdale, AL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in December
Summerdale, AL
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Summerdale, AL
- Average humidity in December: 79%
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Summerdale, AL
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is August (1.89").
The driest month (with the least rainfall) is May (0.59").
Average rainfall days in December
Summerdale, AL
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (6.8 days).
Average snowfall in December
Summerdale, AL
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Summerdale, AL
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Summerdale, AL
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in December: 5h and 3min
The months with the most sunshine are May and June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Summerdale, AL
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (8.1 days).
Average UV index in December
Summerdale, AL
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 4).
Average cloud cover in December
Summerdale, AL
- Average cloud cover in December: 42
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 22).
Average visibility in December
Summerdale, 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).
Summerdale, Alabama, USA
Weather forecast for your location
2. Allow the app to use your location