December weather forecastKeystone Heights, FL
December
Weather in December
December, the first month of the winter in Keystone Heights, is still a pleasant month, with an average temperature ranging between min 51.4°F (10.8°C) and max 68.4°F (20.2°C).Temperature
Keystone Heights's weather in December, with an average high-temperature of a still agreeable 68.4°F (20.2°C), subtly shifts from November's 73°F (22.8°C). An average nighttime temperature of 51.4°F (10.8°C) is noted during the month of December.Humidity
The average relative humidity in December is 77%.Rainfall
In Keystone Heights, in December, during 10.9 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 188.6 rainfall days, and 33.5" (851mm) of precipitation is accumulated.Snowfall
The only month with snowfall is December. The month with the most snowfall days is December, when snow falls for 0.1 days.Daylight
The month with the shortest days is December, with an average of 10h and 18min of daylight.On the first day of December, sunrise is at 7:06 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:39 pm EST.
Sunshine
With an average of 5.9h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily UV index of 4 turns into the following recommendations:
Take precautions - Protection against sun damage is advised. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Keystone Heights, FL
- Average high temperature in December: 68.4°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (64.2°F).
- Average low temperature in December: 51.4°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (46.6°F).
Average pressure in December
Keystone Heights, FL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is September (29.97"Hg).
Average wind speed in December
Keystone Heights, FL
- Average wind speed in December: 5.7mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in December
Keystone Heights, FL
- Average humidity in December: 77%
The months with the highest relative humidity are August and September (78%).
The month with the lowest relative humidity is March (71%).
Average rainfall in December
Keystone Heights, FL
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is July (5.31").
The driest months (with the least rainfall) are January and November (1.5").
Average rainfall days in December
Keystone Heights, FL
- Average rainfall days in December: 10.9 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (9 days).
Average snowfall days in December
Keystone Heights, FL
- Average snowfall days in December: 0.1 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Keystone Heights, FL
- Average daylight in December: 10h and 18min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in December: 5h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
Keystone Heights, FL
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is July (3.6 days).
Average UV index in December
Keystone Heights, FL
- Average UV index in December: 4
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in December
Keystone Heights, FL
- Average cloud cover in December: 40
The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are May and October (Cloud cover 31).
Average visibility in December
Keystone Heights, FL
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is December (5mi).
