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
The advent of December brings a subtle shift in temperature, with the average high moving from a refreshing 61.7°F (16.5°C) in November to a fresh 54.9°F (12.7°C). Throughout December, Rion experiences a low-temperature average of 40.6°F (4.8°C).Humidity
May and December, with an average relative humidity of 75%, are the most humid months.Rainfall
December is the month with the most rainfall in Rion. Rain falls for 12 days and accumulates 3.5" (89mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Rion, in December, snow falls for 0.2 days, with typically accumulated 0.08" (2mm) of snow. In Rion, during the entire year, snow falls for 2.5 days and aggregates up to 1.34" (34mm) of snow.Daylight
The month with the shortest days in Rion is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 7:13 am and sunset at 5:14 pm. On the last day of December, in Rion, sunrise is at 7:30 am and sunset at 5:25 pm EST.
Sunshine
The month with the least sunshine in Rion is December, with an average of 5.4h of sunshine.UV index
The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the UV index of 3 transforms into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What are December temperatures in Rion?
What is the most humid month in Rion?
What is the average humidity in December in Rion?
What is the wettest month in Rion?
How much does it rain in Rion in December?
How many days does it snow in December in Rion?
What is the month with the shortest days in Rion?
What is the average length of the day in December in Rion?
When are sunrise and sunset in December in Rion?
What is the month with the least sunshine in Rion?
How long on average sun shines in December in Rion?
How high is the UV index in December in Rion?
Average temperature in December
Rion, SC
- Average high temperature in December: 54.9°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (51.4°F).
- Average low temperature in December: 40.6°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (36.1°F).
Average pressure in December
Rion, SC
- Average pressure in December: 30.14"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in December
Rion, SC
- Average wind speed in December: 7mph
The windiest months (with the highest average wind speed) are February and April (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Rion, SC
- Average humidity in December: 75%
The months with the highest relative humidity are May and December (75%).
The months with the lowest relative humidity are June, July and November (71%).
Average rainfall in December
Rion, SC
- Average rainfall in December: 3.5"
The wettest month (with the highest rainfall) is December (3.5").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in December
Rion, SC
- Average rainfall days in December: 12 days
The month with the highest number of rainy days is July (18 days).
The months with the least rainy days are October and November (9 days).
Average snowfall in December
Rion, SC
- Average snowfall in December: 0.08"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Rion, SC
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Rion, SC
- 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: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in December
Rion, SC
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is July (10.5 days).
Average UV index in December
Rion, SC
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Rion, SC
- Average cloud cover in December: 42
The months with the most cloud cover are February and December (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Rion, SC
- 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).
Rion, South Carolina, USA
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