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
In December, the average high-temperature is relatively the same as in November - an agreeable 72.3°F (22.4°C). In Port Saint John, the average low-temperature is 60.8°F (16°C).Humidity
In Port Saint John, the average relative humidity in December is 77%.Rainfall
In Port Saint John, it is raining for 12.1 days, with typically 1.61" (41mm) of accumulated precipitation. Throughout the year, in Port Saint John, Florida, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.Daylight
With an average of 10h and 22min of daylight, December has the shortest days of the year in Port Saint John.On the first day of the month, sunrise is at 6:58 am and sunset at 5:26 pm. On the last day of December, in Port Saint John, sunrise is at 7:15 am and sunset at 5:37 pm EST.
Sunshine
The months with the least sunshine in Port Saint John are January, November and December, with an average of 6.1h of sunshine.UV index
In Port Saint John, the average daily maximum UV index in December is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 5 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
FAQ
What is the temperature in December in Port Saint John?
What is the average humidity in December in Port Saint John?
How much does it rain in Port Saint John in December?
What is the month with the shortest days in Port Saint John?
How many hours of daylight does Port Saint John have in December?
When is the sunrise / sunset in December in Port Saint John?
What is the month with the least sunshine in Port Saint John?
How many hours of sunshine does Port Saint John have in December?
What is the UV index reading in December in Port Saint John?
Average temperature in December
Port Saint John, FL
- Average high temperature in December: 72.3°F
The warmest month (with the highest average high temperature) is August (88.7°F).
The month with the lowest average high temperature is January (68.4°F).
- Average low temperature in December: 60.8°F
The month with the highest average low temperature is August (77.9°F).
The coldest month (with the lowest average low temperature) is January (56.1°F).
Average pressure in December
Port Saint John, 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 (29.97"Hg).
Average wind speed in December
Port Saint John, FL
- Average wind speed in December: 8.2mph
The windiest months (with the highest average wind speed) are January and November (8.8mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
Port Saint John, FL
- Average humidity in December: 77%
The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Port Saint John, FL
- Average rainfall in December: 1.61"
The wettest month (with the highest rainfall) is August (6.81").
The driest month (with the least rainfall) is March (1.42").
Average rainfall days in December
Port Saint John, FL
- Average rainfall days in December: 12.1 days
The months with the highest number of rainy days are July and August (25.8 days).
The month with the least rainy days is February (10.8 days).
Average daylight in December /
Average sunshine in December
Port Saint John, FL
- Average daylight in December: 10h and 22min
The month with the longest days is June (Average daylight: 13h and 56min).
The month with the shortest days is December (Average daylight: 10h and 22min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The months with the least sunshine are January, November and December (Average sunshine: 6h and 6min).
Average sunshine days in December
Port Saint John, FL
- Average sunshine days in December: 15.2 days
The months with the most sunshine days are January and March (17.2 days).
The month with the least sunshine days is August (2.3 days).
Average UV index in December
Port Saint John, 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
Port Saint John, FL
- Average cloud cover in December: 35
The months with the most cloud cover are January, November and December (Cloud cover 35).
The month with the least cloud cover is May (Cloud cover 26).
Average visibility in December
Port Saint John, 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).
Weather forecast for your location
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