December weather forecastRock Harbor, FL
December
Weather in December
December, the first month of the winter in Rock Harbor, is also a moderately hot month, with an average temperature fluctuating between 71.1°F (21.7°C) and 75.2°F (24°C).Temperature
Rock Harbor experiences a transition to a still warm 75.2°F (24°C) in average high-temperatures with the arrival of December, not greatly differing from November's 77.7°F (25.4°C). In Rock Harbor, December is characterized by an average low-temperature of 71.1°F (21.7°C), indicating a minor drop from daytime highs.Humidity
The months with the highest humidity are February, June and December, with an average relative humidity of 76%.Rainfall
In December, the rain falls for 12.5 days. Throughout December, 0.91" (23mm) of precipitation is accumulated. In Rock Harbor, during the entire year, the rain falls for 190.1 days and collects up to 27.05" (687mm) of precipitation.Daylight
The month with the shortest days in Rock Harbor is December, with an average of 10h and 36min of daylight.On the first day of December, sunrise is at 6:50 am and sunset at 5:31 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:43 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 6.4h of sunshine.UV index
In Rock Harbor, the average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 6 during December translates into these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rock Harbor, FL
- Average high temperature in December: 75.2°F
The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (72.7°F).
- Average low temperature in December: 71.1°F
The month with the highest average low temperature is August (82.9°F).
The coldest month (with the lowest average low temperature) is January (66.9°F).
Average pressure in December
Rock Harbor, FL
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are September and October (29.94"Hg).
Average wind speed in December
Rock Harbor, FL
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in December
Rock Harbor, FL
- Average humidity in December: 76%
The months with the highest relative humidity are February, June and December (76%).
The month with the lowest relative humidity is March (73%).
Average rainfall in December
Rock Harbor, FL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is August (4.33").
The driest month (with the least rainfall) is March (0.59").
Average rainfall days in December
Rock Harbor, FL
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is September (22.9 days).
The month with the least rainy days is February (9.7 days).
Average daylight in December /
Average sunshine in December
Rock Harbor, FL
- Average daylight in December: 10h and 36min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 36min).
- Average sunshine in December: 6h and 24min
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 24min).
Average sunshine days in December
Rock Harbor, FL
- Average sunshine days in December: 14.9 days
The month with the most sunshine days is January (17.3 days).
The month with the least sunshine days is September (5.2 days).
Average UV index in December
Rock Harbor, FL
- Average UV index in December: 6
The months with the highest UV index are April, May, June, July, August, September and October (UV index 7).
The month with the lowest UV index is January (UV index 5).
Average cloud cover in December
Rock Harbor, FL
- Average cloud cover in December: 33
The month with the most cloud cover is October (Cloud cover 35).
The month with the least cloud cover is April (Cloud cover 26).
Average visibility in December
Rock Harbor, 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).
