December weather forecastCortez, FL
December
Weather in December
The first month of the winter, December, is still a pleasant month in Cortez, Florida, with an average temperature varying between 61.9°F (16.6°C) and 70.9°F (21.6°C).Temperature
Cortez, Florida, experiences a recorded average high-temperature of an agreeable 70.9°F (21.6°C) in December, closely aligned with November's 75°F (23.9°C). A modest decline from daytime high temperatures in Cortez is noticed in December, marking the average low at an enjoyable 61.9°F (16.6°C).Humidity
With an average relative humidity of 77%, December is the most humid month in Cortez, Florida.Rainfall
In Cortez, Florida, during December, the rain falls for 8.7 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, there are 166.4 rainfall days, and 26.38" (670mm) of precipitation is accumulated.Ocean temperature
In Cortez, the average seawater temperature in December is 69.3°F (20.7°C).Note: Swimming is not a pleasurable activity for most people when the water temperature is 69.3°F (20.7°C). Breathing control gets harder as the water temperature drops from 69.8°F (21°C) to 59°F (15°C).
Daylight
With an average of 10h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:04 am and sunset at 5:35 pm. On the last day of December, sunrise is at 7:20 am and sunset at 5:47 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 6.5h of sunshine.UV index
In December, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 in December converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cortez, FL
- Average high temperature in December: 70.9°F
The warmest month (with the highest average high temperature) is August (87.4°F).
The month with the lowest average high temperature is January (66.9°F).
- Average low temperature in December: 61.9°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (56.8°F).
Average pressure in December
Cortez, FL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in December
Cortez, FL
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in December
Cortez, FL
- Average humidity in December: 77%
The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Cortez, FL
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is July (4.88").
The driest month (with the least rainfall) is November (0.71").
Average rainfall days in December
Cortez, FL
- Average rainfall days in December: 8.7 days
The months with the highest number of rainy days are July and August (24.6 days).
The month with the least rainy days is January (7.3 days).
Average sea temperature in December
Cortez, FL
- Average sea temperature in December: 69.2°F
The best month for swimming (with the highest average sea temperature) is August (86.7°F).
The coldest month (with the lowest average sea temperature) is January (64.1°F).
Average daylight in December /
Average sunshine in December
Cortez, FL
- Average daylight in December: 10h and 24min
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 24min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is May (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Cortez, FL
- Average sunshine days in December: 20.8 days
The month with the most sunshine days is January (22.6 days).
The months with the least sunshine days are July and August (4.8 days).
Average UV index in December
Cortez, 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
Cortez, FL
- Average cloud cover in December: 30
The months with the most cloud cover are January and December (Cloud cover 30).
The month with the least cloud cover is May (Cloud cover 21).
Average visibility in December
Cortez, 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).





