Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December notes an average high-temperature of a pleasant 69.8°F (21°C), subtly differing from November's 73.9°F (23.3°C). During the month of December, an average low-temperature of 53.1°F (11.7°C) is recorded in San Mateo.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. Throughout the year, in San Mateo, there are 138.3 rainfall days, and 12.76" (324mm) of precipitation is accumulated.Snowfall
In San Mateo, Florida, snow does not fall in February through December.Daylight
December has the shortest days of the year in San Mateo, with an average of 10h and 18min of daylight.On the first day of December, sunrise is at 7:04 am and sunset at 5:27 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:38 pm EST.
Sunshine
With an average of 5.9h of sunshine, December has the least sunshine of the year.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 exposure to the Sun's UV radiation for the ordinary person.Note: In December, a regular UV index of 4 translates into these guidelines:
Prioritize safety - Suggestions to prevent sun damage are offered. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What are the temperatures in San Mateo in December?
What are the most humid months in San Mateo?
What is the average humidity in December in San Mateo?
How many days does it rain in December in San Mateo?
When it does not snow in San Mateo?
Does it snow in San Mateo in December?
What is the month with the shortest days in San Mateo?
How many hours of daylight does San Mateo have in December?
What time are sunrise and sunset in December in San Mateo?
What is the month with the least sunshine in San Mateo?
How long on average sun shines in December in San Mateo?
When is the lowest UV index in San Mateo?
What is the UV index intensity in December in San Mateo?
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 2min
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 5min
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).
San Mateo, Florida, USA
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