December weather forecast
Port Saint John, FL

Weather in December

December, the first month of the winter in Port Saint John, is also an agreeable month, with temperature in the range of an average high of 72.3°F (22.4°C) and an average low of 60.8°F (16°C).

Temperature

In Port Saint John, the average high-temperature in December is relatively the same as in November - an agreeable 72.3°F (22.4°C). In Port Saint John, in December, 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, Florida, during 12.1 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Port Saint John, Florida, during the entire year, the rain falls for 202 days and collects up to 40.2" (1021mm) of precipitation.

Daylight

With an average of 10h and 22min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:58 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:37 pm EST.

Sunshine

The months with the least sunshine are January, November and December, with an average of 6.1h of sunshine.

UV index

In December, the average daily maximum UV index in Port Saint John is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 5 in December transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
[Resources]

FAQ

What is the average humidity in December in Port Saint John?

In December, the average relative humidity in Port Saint John, Florida, is 77%.

How many days does it rain in December in Port Saint John?

In Port Saint John, Florida, during December, the rain falls for 12.1 days and regularly aggregates up to 1.61" (41mm) of precipitation.

What is the month with the shortest days in Port Saint John?

The month with the shortest days in Port Saint John is December, with an average of 10h and 22min of daylight.

What is the average length of the day in December in Port Saint John?

In Port Saint John, Florida, the average day length in December is 10h and 22min.

When is the sunrise / sunset in December in Port Saint John?

On the first day of December in Port Saint John, Florida, sunrise is at 6:58 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 5:37 pm EST.

What is the month with the least sunshine in Port Saint John?

January, November and December, with an average of 6.1h of sunshine, are months with the least sunshine.

How many hours of sunshine does Port Saint John have in December?

The average sunshine duration in December in Port Saint John, Florida, is 6.1h.

What is the UV index intensity in December in Port Saint John?

In December, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Port Saint John, FL

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).

[Resources]

Average pressure in December
Port Saint John, FL

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).

[Resources]

Average wind speed in December
Port Saint John, FL

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).

[Resources]

Average humidity in December
Port Saint John, FL

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%).

[Resources]

Average rainfall in December
Port Saint John, FL

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").

[Resources]

Average rainfall days in December
Port Saint John, FL

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).

[Resources]

Average daylight in December /
Average sunshine in December
Port Saint John, FL

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).

[Resources]

Average sunshine days in December
Port Saint John, FL

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).

[Resources]

Average UV index in December
Port Saint John, FL

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).

[Resources]

Average cloud cover in December
Port Saint John, FL

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).

[Resources]

Average visibility in December
Port Saint John, FL

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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location