December weather forecastSan Mateo, FL
December
Weather in December
The first month of the winter, December, is still a pleasant month in San Mateo, Florida, with an average temperature varying between 69.8°F (21°C) and 53.1°F (11.7°C).Temperature
An average high-temperature of an agreeable 69.8°F (21°C) marks December, exhibiting a close resemblance to the conditions in November. San Mateo experiences an average low-temperature of 53.1°F (11.7°C) in the month of December.Humidity
The months with the highest humidity are August, September and December, with an average relative humidity of 77%.Rainfall
In San Mateo, in December, during 6.9 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In San Mateo, during the entire year, the rain falls for 138.3 days and collects up to 12.76" (324mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
The month with the shortest days is December, with an average of 10h and 18min of daylight.On the first day of the month, sunrise is at 7:04 am and sunset at 5:27 pm. On the last day of December, sunrise is at 7:21 am and sunset at 5:38 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.9h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index in San Mateo. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during December leads to these instructions:
Heed the precautions - It is counselled to guard against solar damage. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
San Mateo, FL
- Average high temperature in December: 69.8°F
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (65.8°F).
- Average low temperature in December: 53.1°F
The month with the highest average low temperature is August (75.4°F).
The coldest month (with the lowest average low temperature) is January (48.2°F).
Average pressure in December
San Mateo, 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
San Mateo, FL
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (5.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in December
San Mateo, FL
- Average humidity in December: 77%
The months with the highest relative humidity are August, September and December (77%).
The month with the lowest relative humidity is March (70%).
Average rainfall in December
San Mateo, FL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is July (2.09").
The driest month (with the least rainfall) is March (0.47").
Average rainfall days in December
San Mateo, FL
- Average rainfall days in December: 6.9 days
The month with the highest number of rainy days is August (18.8 days).
The month with the least rainy days is November (6.7 days).
Average snowfall days in December
San Mateo, FL
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
San Mateo, 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 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).
Average sunshine days in December
San Mateo, FL
- Average sunshine days in December: 20.9 days
The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is June (9.3 days).
Average UV index in December
San Mateo, 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
San Mateo, 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 July (Cloud cover 30).
Average visibility in December
San Mateo, 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).
