December weather forecastCasselberry, FL
December
Weather in December
The first month of the winter, December, is also an agreeable month in Casselberry, Florida, with an average temperature fluctuating between 72.1°F (22.3°C) and 56.3°F (13.5°C).Temperature
With the start of December, Casselberry measures an average high-temperature of an agreeable 72.1°F (22.3°C), not significantly differing from November's 75.7°F (24.3°C). During the December nights, an average temperature of 56.3°F (13.5°C) is observed.Humidity
In December, the average relative humidity in Casselberry is 76%.Rainfall
In Casselberry, in December, it is raining for 9.5 days, with typically 0.91" (23mm) of accumulated precipitation. In Casselberry, during the entire year, the rain falls for 172.9 days and collects up to 22.76" (578mm) of precipitation.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 7:01 am and sunset at 5:27 pm. On the last day of December, in Casselberry, sunrise is at 7:18 am and sunset at 5:39 pm EST.
Sunshine
With an average of 6.1h of sunshine, December has the least sunshine of the year.UV index
In December, the average daily maximum UV index in Casselberry is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in December transforms into this advice:
Take precautions - Protection against skin and eye damage is obliged. Around midday, solar radiation is most harmful; hence, exposure should be limited. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Casselberry, FL
- Average high temperature in December: 72.1°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (68.2°F).
- Average low temperature in December: 56.3°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is January (51.1°F).
Average pressure in December
Casselberry, FL
- Average pressure in December: 30.11"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
Casselberry, FL
- Average wind speed in December: 6mph
The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in December
Casselberry, FL
- Average humidity in December: 76%
The month with the highest relative humidity is September (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in December
Casselberry, FL
- Average rainfall in December: 0.91"
The wettest month (with the highest rainfall) is August (3.82").
The driest months (with the least rainfall) are January and March (0.79").
Average rainfall days in December
Casselberry, FL
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is January (8.9 days).
Average daylight in December /
Average sunshine in December
Casselberry, FL
- Average daylight in December: 10h and 24min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in December: 6h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in December
Casselberry, FL
- Average sunshine days in December: 18.7 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (4.6 days).
Average UV index in December
Casselberry, 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
Casselberry, FL
- Average cloud cover in December: 35
The month with the most cloud cover is February (Cloud cover 37).
The month with the least cloud cover is May (Cloud cover 28).
Average visibility in December
Casselberry, 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).
