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
Simpsonville in December experiences a subtle temperature decline, with average high-temperatures reducing from a cool 53.2°F (11.8°C) in November to a frosty 44.1°F (6.7°C). December is noted for a mean low-temperature of 31.8°F (-0.1°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 80%.Rainfall
In Simpsonville, in December, it is raining for 11.5 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 152.3 rainfall days, and 25.75" (654mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Simpsonville, Kentucky, in December, during 5.5 snowfall days, 0.98" (25mm) of snow is typically accumulated. Throughout the year, there are 27.1 snowfall days, and 5.98" (152mm) of snow is accumulated.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:39 am and sunset at 5:21 pm. On the last day of December, sunrise is at 7:57 am and sunset at 5:31 pm EST.
Sunshine
In December, the average sunshine is 4.4h.UV index
January, February, November 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 low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 2 transforms into the following advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
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 Simpsonville have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Simpsonville, KY
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Simpsonville, KY
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Simpsonville, KY
- Average wind speed in December: 7.6mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in December
Simpsonville, KY
- Average humidity in December: 80%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are August, September and October (74%).
Average rainfall in December
Simpsonville, KY
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is April (2.8").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in December
Simpsonville, KY
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8.9 days).
Average snowfall in December
Simpsonville, KY
- Average snowfall in December: 0.98"
The month with the highest snowfall is March (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Simpsonville, KY
- Average snowfall days in December: 5.5 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Simpsonville, KY
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Simpsonville, KY
- Average sunshine days in December: 15.7 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Simpsonville, KY
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Simpsonville, KY
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in December
Simpsonville, KY
- Average visibility in December: 6mi
The months with the highest visibility are March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and May (5mi).
Simpsonville, Kentucky, USA
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