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 sea temperature 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 the onset of December, a modest change to a still warm 74.3°F (23.5°C) from November's 77.9°F (25.5°C) is noted in high-temperature. December nights are marked by an average temperature drop to an enjoyable 62.4°F (16.9°C).Humidity
The months with the highest humidity are September and December, with an average relative humidity of 76%.Rainfall
In Iona, in December, during 6.8 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. In Iona, during the entire year, the rain falls for 156.4 days and collects up to 17.95" (456mm) of precipitation.Ocean temperature
In Iona, Florida, the average seawater temperature in December is 71.2°F (21.8°C).Note: Swimming is not a pleasant activity for most individuals in 71.2°F (21.8°C). Breathing becomes increasingly challenging to control as the water temperature dips from 69.8°F (21°C) to 59°F (15°C).
Daylight
December has the shortest days of the year, with an average of 10h and 30min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 5:34 pm. On the last day of December, in Iona, sunrise is at 7:15 am and sunset at 5:46 pm EST.
Sunshine
With an average of 6.6h of sunshine, December has the least sunshine of the year.UV index
In December, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum UV index of 5 in December translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Opt for tightly woven and loose clothing to enhance protection from the Sun. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
How cold is the water in December?
What is the month with the shortest days?
How many hours of daylight does Iona have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Iona have in December?
What is the UV index intensity in December?
Average temperature in December
Iona, FL
- Average high temperature in December: 74.3°F
The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is January (70.7°F).
- Average low temperature in December: 62.4°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is January (57.7°F).
Average pressure in December
Iona, FL
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is September (29.95"Hg).
Average wind speed in December
Iona, FL
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is October (8.7mph).
The calmest month (with the lowest average wind speed) is July (6.2mph).
Average humidity in December
Iona, FL
- Average humidity in December: 76%
The months with the highest relative humidity are September and December (76%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Iona, FL
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is August (3.94").
The driest months (with the least rainfall) are February and March (0.43").
Average rainfall days in December
Iona, FL
- Average rainfall days in December: 6.8 days
The month with the highest number of rainy days is August (24 days).
The month with the least rainy days is February (6.2 days).
Average sea temperature in December
Iona, FL
- Average sea temperature in December: 71.2°F
The best month for swimming (with the highest average sea temperature) is August (86.8°F).
The coldest month (with the lowest average sea temperature) is January (67°F).
Average daylight in December /
Average sunshine in December
Iona, FL
- Average daylight in December: 10h and 3min
The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Iona, FL
- Average sunshine days in December: 21.9 days
The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is August (5.3 days).
Average UV index in December
Iona, 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
Iona, FL
- Average cloud cover in December: 28
The month with the most cloud cover is January (Cloud cover 29).
The months with the least cloud cover are March and May (Cloud cover 24).
Average visibility in December
Iona, 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).
Iona, Florida, USA
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