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
With December's onset, the weather reveals a slight temperature decrease, transitioning from a pleasant 70°F (21.1°C) in November to a comfortable 64.6°F (18.1°C). In the month of December, an average of 49.6°F (9.8°C) marks the low-temperature.Humidity
December is the most humid month, with an average relative humidity of 77%.Rainfall
In Sumatra, in December, during 11.3 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. Throughout the year, there are 164.7 rainfall days, and 30.63" (778mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 18min of daylight.On the first day of December, sunrise is at 7:18 am and sunset at 5:39 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:50 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.7h of sunshine.UV index
The average daily maximum UV index in December is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during December translates into the following guidance:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
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?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What is the UV index reading in December in Sumatra?
Average temperature in December
Sumatra, FL
- Average high temperature in December: 64.6°F
The warmest month (with the highest average high temperature) is August (90.3°F).
The month with the lowest average high temperature is January (60.8°F).
- Average low temperature in December: 49.6°F
The month with the highest average low temperature is August (76.3°F).
The coldest month (with the lowest average low temperature) is January (45.3°F).
Average pressure in December
Sumatra, FL
- 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 (29.98"Hg).
Average wind speed in December
Sumatra, FL
- Average wind speed in December: 6.7mph
The windiest months (with the highest average wind speed) are January and March (7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Sumatra, FL
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January, May and October (72%).
Average rainfall in December
Sumatra, FL
- Average rainfall in December: 3.23"
The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is November (1.38").
Average rainfall days in December
Sumatra, FL
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (7.5 days).
Average daylight in December /
Average sunshine in December
Sumatra, FL
- Average daylight in December: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in December: 5h and 4min
The months with the most sunshine are May, June and July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in December
Sumatra, FL
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is August (5.2 days).
Average UV index in December
Sumatra, FL
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in December
Sumatra, FL
- Average cloud cover in December: 39
The months with the most cloud cover are February and December (Cloud cover 39).
The month with the least cloud cover is May (Cloud cover 23).
Average visibility in December
Sumatra, 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).
Sumatra, Florida, USA
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