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
Entering December, Port Saint John's average high-temperature reads a pleasant 72.3°F (22.4°C), indicating a close resemblance to the previous month's climate. During December, Port Saint John experiences a consistent low-temperature average of 60.8°F (16°C).Humidity
The average relative humidity in December is 77%.Rainfall
In December, in Port Saint John, the rain falls for 12.1 days. Throughout December, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 202 rainfall days, and 40.2" (1021mm) of precipitation is accumulated.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 6:58 am and sunset at 5:26 pm. On the last day of December, sunrise is at 7:15 am and sunset at 5:37 pm EST.
Sunshine
January, November and December, with an average of 6.1h of sunshine, are months with the least sunshine in Port Saint John, Florida.UV index
The average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum high daily UV index of 5 during December translates into the following directions:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Frequently asked questions
What are December temperatures 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 are the months with the least sunshine in Port Saint John?
How long on average sun shines in December in Port Saint John?
How high is the UV index 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 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 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).
Port Saint John, Florida, USA
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