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 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
December
Weather in December
Temperature
San Francisco del Mar in December witnesses an average high-temperature of a still moderately hot 28.9°C (84°F), indicating a slight variation from November's 29.5°C (85.1°F). During December in San Francisco del Mar, the average low-temperature is recorded at an agreeable 20.7°C (69.3°F).Heat index
During December, the heat index is evaluated at a hot 33°C (91.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.It is crucial to understand that heat index figures are for shade and gentle wind conditions. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', reflects the feeling of heat when considering both air temperature and humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Humidity
In December, the average relative humidity is 70%.Rainfall
In San Francisco del Mar, during December, the rain falls for 2.5 days and regularly aggregates up to 3mm (0.12") of precipitation. Throughout the year, in San Francisco del Mar, there are 132.1 rainfall days, and 500mm (19.69") of precipitation is accumulated.Daylight
With an average of 11h and 12min of daylight, December has the shortest days of the year in San Francisco del Mar.On the first day of December, sunrise is at 6:30 am and sunset at 5:44 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 5:56 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 7.5h of sunshine.UV index
The months with the lowest UV index in San Francisco del Mar are January, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during December translates into these guidelines:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December in San Francisco del Mar?
What is the average humidity in December in San Francisco del Mar?
How many days does it rain in December in San Francisco del Mar?
What is the month with the shortest days in San Francisco del Mar?
What is the average length of the day in December in San Francisco del Mar?
When is the sunrise / sunset in December in San Francisco del Mar?
What is the month with the least sunshine in San Francisco del Mar?
How long on average sun shines in December in San Francisco del Mar?
What is the month with the lowest UV index in San Francisco del Mar?
What is the UV index intensity in December in San Francisco del Mar?
Average temperature in December
San Francisco del Mar, Mexico
- Average high temperature in December: 28.9°C
The warmest month (with the highest average high temperature) is May (34.4°C).
The month with the lowest average high temperature is January (28°C).
- Average low temperature in December: 20.7°C
The month with the highest average low temperature is May (25.1°C).
The coldest month (with the lowest average low temperature) is January (19.8°C).
Average pressure in December
San Francisco del Mar, Mexico
- Average pressure in December: 1014.5mbar
The month with the highest atmospheric pressure is January (1015.5mbar).
The month with the lowest atmospheric pressure is May (1011.2mbar).
Average wind speed in December
San Francisco del Mar, Mexico
- Average wind speed in December: 20.7km/h
The windiest month (with the highest average wind speed) is November (22.3km/h).
The calmest month (with the lowest average wind speed) is June (10.8km/h).
Average humidity in December
San Francisco del Mar, Mexico
- Average humidity in December: 70%
The month with the highest relative humidity is September (74%).
The months with the lowest relative humidity are April and May (63%).
Average rainfall in December
San Francisco del Mar, Mexico
- Average rainfall in December: 3mm
The wettest month (with the highest rainfall) is August (109mm).
The driest months (with the least rainfall) are January and March (2mm).
Average rainfall days in December
San Francisco del Mar, Mexico
- Average rainfall days in December: 2.5 days
The month with the highest number of rainy days is June (22.8 days).
The month with the least rainy days is February (2.4 days).
Average daylight in December /
Average sunshine in December
San Francisco del Mar, Mexico
- Average daylight in December: 11h and 1min
The month with the longest days is June (Average daylight: 13h and 6min).
The month with the shortest days is December (Average daylight: 11h and 12min).
- Average sunshine in December: 7h and 3min
The month with the most sunshine is May (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 7h and 30min).
Average sunshine days in December
San Francisco del Mar, Mexico
- Average sunshine days in December: 27.3 days
The month with the most sunshine days is December (27.3 days).
The month with the least sunshine days is June (5.3 days).
Average UV index in December
San Francisco del Mar, Mexico
- Average UV index in December: 6
The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, October, November and December (UV index 6).
Average cloud cover in December
San Francisco del Mar, Mexico
- Average cloud cover in December: 12
The months with the most cloud cover are June and September (Cloud cover 36).
The month with the least cloud cover is December (Cloud cover 12).
Average visibility in December
San Francisco del Mar, Mexico
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
