September and October temperatures will be near normal, on average, with rainfall below normal. The hottest periods will be in early and mid-June and mid-August. ![]() Summer will bring slightly above-normal temperatures, with below-normal rainfall. The warmest sea in Siesta Key in December is 74.8☏, and the coldest is 61.5☏. April and May will be slightly warmer than normal, with rainfall above normal in the north and normal in the south. Winter will be colder and rainier than normal, with the coldest temperatures in early and late January and mid-February. Daily high temperatures decrease by 4☏, from 76☏ to 71☏, rarely falling below 61☏ or exceeding 82☏. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.Enter Your Location Annual Weather Summary December Weather in Siesta Key Florida, United States. On bright days sunglasses that block both UVA and UVB rays should be worn. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Tell us: Siesta Key or Sanibel in December We have three days to spend before hooking up with family for the holidays - should we fly into Orlando and do Sanibel or fly into Tampa and do. Light skin individuals may get burned in less than 30 minutes. Note: In January, the average maximum UV index of 4 translate into the following recommendations: A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person. UV indexWith an average maximum UV index of 4, January is the month with the lowest UV index in Siesta Key. SunshineIn Siesta Key, the average sunshine in January is 7.3h. December, the first month of the winter in Siesta Key, is still a pleasant month, with temperature in the range of an average high of 72.5☏ (22. ![]() On the last day of January, in Siesta Key, sunrise is at 7:16 am and sunset at 6:10 pm EST. On the first day of the month, sunrise is at 7:19 am and sunset at 5:47 pm. DaylightIn Siesta Key, the average length of the day in January is 10h and 39min. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8☏ (21☌). Note: Swimming in 64☏ (17.8☌) is not enjoyable for the majority. Ocean temperatureWith an average ocean temperature of 64☏ (17.8☌), January is the month with the coldest seawater. The daily high averages around 74F and can drop as low as 54F. In Siesta Key, during the entire year, the rain falls for 183.1 days and collects up to 34.92" (887mm) of precipitation. The cool season starts in December and lasts until March. Rainfall In Siesta Key, during January, the rain falls for 8.3 days and regularly aggregates up to 1.22" (31mm) of precipitation. Answer 1 of 2: Hello, Just wondering what the weather is like in December.is it beach weather or too chilly. HumidityIn January, the average relative humidity is 73%. ![]() TemperatureJanuary is the coldest month, with an average high-temperature of 68.5☏ (20.3☌) and an average low-temperature of 56.1☏ (13.4☌). Average temperatures are a balmy 75 degrees Temperatures are moderated by breezes off the Gulf of Mexico. There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Siesta Key. Siesta Key has an almost-perfect subtropical climate. January, like December, is another pleasant winter month in Siesta Key, Florida, with an average temperature ranging between max 68.5☏ (20.3☌) and min 56.1☏ (13.4☌). This report illustrates the typical weather in Siesta Key, based on a statistical analysis of historical hourly weather reports and model reconstructions from Januto December 31, 2016.
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