December weather forecastRio Vista Isles, FL
December
Weather in December
December, the first month of the winter in Rio Vista Isles, is also a moderately hot month, with an average temperature varying between 75.4°F (24.1°C) and 68.5°F (20.3°C).Temperature
The high-temperature average in December for Rio Vista Isles, Florida, is a still moderately hot 75.4°F (24.1°C), staying closely aligned with November's conditions. Throughout December, Rio Vista Isles records a steady low-temperature average of 68.5°F (20.3°C), a minor decrease from its daytime counterpart.Humidity
With an average relative humidity of 75%, December is the most humid month.Rainfall
In Rio Vista Isles, in December, it is raining for 10.4 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 179 rainfall days, and 15.55" (395mm) of precipitation is accumulated.Daylight
With an average of 10h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 6:51 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:39 pm EST.
Sunshine
The months with the least sunshine are January and December, with an average of 6.3h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: A daily maximum UV index of 5 in December translates into the following instructions:
Undertake protective steps - Preventing sun damage is advised. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Rio Vista Isles, FL
- Average high temperature in December: 75.4°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 (73°F).
- Average low temperature in December: 68.5°F
The month with the highest average low temperature is August (82°F).
The coldest month (with the lowest average low temperature) is January (64.2°F).
Average pressure in December
Rio Vista Isles, FL
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are September and October (29.95"Hg).
Average wind speed in December
Rio Vista Isles, FL
- Average wind speed in December: 10.7mph
The windiest month (with the highest average wind speed) is March (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in December
Rio Vista Isles, FL
- Average humidity in December: 75%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is March (69%).
Average rainfall in December
Rio Vista Isles, FL
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is August (2.68").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in December
Rio Vista Isles, FL
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is September (23.6 days).
The month with the least rainy days is February (8.3 days).
Average daylight in December /
Average sunshine in December
Rio Vista Isles, FL
- Average daylight in December: 10h and 30min
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 30min).
- Average sunshine in December: 6h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 6h and 18min).
Average sunshine days in December
Rio Vista Isles, FL
- Average sunshine days in December: 15.1 days
The month with the most sunshine days is January (17.4 days).
The month with the least sunshine days is September (3.9 days).
Average UV index in December
Rio Vista Isles, 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 months with the lowest UV index are January and December (UV index 5).
Average cloud cover in December
Rio Vista Isles, 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 27).
Average visibility in December
Rio Vista Isles, 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).
