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 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 initiation of December sees an average high-temperature of a pleasant 72.5°F (22.5°C), showing minor variations from the previous month. In December, Royster encounters an average low-temperature of 55.9°F (13.3°C) during the night.Humidity
The average relative humidity in December is 77%.Rainfall
In December, the rain falls for 9.5 days. Throughout December, 1.57" (40mm) of precipitation is accumulated. In Royster, during the entire year, the rain falls for 189 days and collects up to 36.54" (928mm) of precipitation.Daylight
The month with the shortest days is December, with an average of 10h and 24min of daylight.On the first day of the month, sunrise is at 7:02 am and sunset at 5:32 pm. On the last day of December, sunrise is at 7:18 am and sunset at 5:43 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 6.1h of sunshine.UV index
In December, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 5 in December translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What is the average humidity in December?
How many days does it rain 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?
What is the month with the least sunshine?
How long on average sun shines in December?
How high is the UV index in December?
Average temperature in December
Royster, FL
- Average high temperature in December: 72.5°F
The warmest month (with the highest average high temperature) is August (90°F).
The month with the lowest average high temperature is January (68.9°F).
- Average low temperature in December: 55.9°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is January (51.1°F).
Average pressure in December
Royster, FL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in December
Royster, FL
- Average wind speed in December: 6.3mph
The windiest months (with the highest average wind speed) are March and April (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).
Average humidity in December
Royster, FL
- Average humidity in December: 77%
The months with the highest relative humidity are August and September (79%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Royster, FL
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is August (6.89").
The driest months (with the least rainfall) are January and November (1.18").
Average rainfall days in December
Royster, FL
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (26.8 days).
The month with the least rainy days is January (9.1 days).
Average daylight in December /
Average sunshine in December
Royster, FL
- Average daylight in December: 10h and 2min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 6h and 1min
The month with the most sunshine is May (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Royster, FL
- Average sunshine days in December: 18.8 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (2.9 days).
Average UV index in December
Royster, FL
- Average UV index in December: 5
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 4).
Average cloud cover in December
Royster, FL
- Average cloud cover in December: 37
The months with the most cloud cover are February and December (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 29).
Average visibility in December
Royster, FL
- 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).
Royster, Florida, USA
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