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 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
Transitioning into December, O'Brien records an average high-temperature of a refreshing 66°F (18.9°C), almost identical to November's 71.2°F (21.8°C). Nighttime temperatures hover around an average low of 49.1°F (9.5°C) in December.Humidity
In O'Brien, the average relative humidity in December is 76%.Rainfall
In O'Brien, in December, it is raining for 9.5 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 173.7 rainfall days, and 30.83" (783mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
With an average of 10h and 18min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:10 am and sunset at 5:31 pm. On the last day of December, in O'Brien, sunrise is at 7:27 am and sunset at 5:42 pm EST.
Sunshine
December has the least sunshine of the year, with an average of 5.9h of sunshine.UV index
In O'Brien, the average daily maximum UV index in December is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in December leads to these recommendations:
Guard yourself - Avoiding sunburn is suggested. To guard against the harmful effects of the Sun, minimize exposure during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in O'Brien?
What is the average humidity in December?
How much does it rain in December?
When it does not snow?
What is the month with the shortest days?
How many hours of daylight does O'Brien have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does O'Brien have in December?
How high is the UV index in December?
Average temperature in December
O'Brien, FL
- Average high temperature in December: 66°F
The warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.2°F).
- Average low temperature in December: 49.1°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in December
O'Brien, FL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in December
O'Brien, FL
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
O'Brien, FL
- Average humidity in December: 76%
The months with the highest relative humidity are August and September (77%).
The month with the lowest relative humidity is May (70%).
Average rainfall in December
O'Brien, FL
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is August (4.53").
The driest month (with the least rainfall) is November (0.98").
Average rainfall days in December
O'Brien, FL
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is August (25.4 days).
The month with the least rainy days is November (7.1 days).
Average snowfall days in December
O'Brien, FL
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
O'Brien, 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 5min
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 54min).
Average sunshine days in December
O'Brien, FL
- Average sunshine days in December: 20.3 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in December
O'Brien, 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
O'Brien, FL
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 30).
Average visibility in December
O'Brien, FL
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
O'Brien, Florida, USA
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