Santos
Brazil
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Santos, Brazil

December, the first month of the summer, in Santos, is still a warm month, with average temperature varying between 27.4°C (81.3°F) and 21.2°C (70.2°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a still warm 27.4°C (81.3°F). In Santos, in December, the average low-temperature is 21.2°C (70.2°F).

Heat index

The average heat index is evaluated at a tropical 30.5°C (86.9°F). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'real feel', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, wind, differences in body mass, height, and shape), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Santos, the average relative humidity is 79%.

Rainfall

In Santos, Brazil, during December, the rain falls for 14 days and regularly aggregates up to 210.9mm (8.3") of precipitation. Throughout the year, in Santos, there are 132 rainfall days, and 1990.5mm (78.4") of precipitation is accumulated.

Sea temperature

In Santos, the average seawater temperature in December is 24.8°C (76.6°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 24.8°C (76.6°F).

Daylight

December has the longest days of the year in Santos, with an average of 13.6h of daylight.

Sunshine

The average sunshine in December is 4.3h.

What is the temperature in December in Santos?

In Santos, Brazil, in December, the average high-temperature is 27.4°C (81.3°F), and the average low-temperature is 21.2°C (70.2°F). In December, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines air temperature and relative humidity, is appraised at 30.5°C (86.9°F).

What is the average humidity in December in Santos?

In Santos, Brazil, the average relative humidity in December is 79%.

How much does it rain in Santos in December?

In December, in Santos, Brazil, the rain falls for 14 days. Throughout December, 210.9mm (8.3") of precipitation is accumulated.

What is the sea temperature in December in Santos?

In Santos, Brazil, the average seawater temperature in December is 24.8°C (76.6°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 24.8°C (76.6°F) water may be enjoyable.

When are the longest days in Santos?

December has the longest days of the year in Santos, Brazil, with an average of 13.6h of daylight.

How many hours of daylight does Santos have in December?

In December, the average length of the day in Santos is 13.6h.

How long on average sun shines in December in Santos?

In December, the average sunshine in Santos, Brazil, is 4.3h.
Average temperature in December - Santos, Brazil
  • Average high temperature in December: 27.4°C

The warmest month (with the highest average high temperature) is February (28.9°C).
The month with the lowest average high temperature is September (22.4°C).

  • Average low temperature in December: 21.2°C

The month with the highest average low temperature is February (22.4°C).
The coldest month (with the lowest average low temperature) is July (15.5°C).

Average humidity in December - Santos, Brazil
  • Average humidity in December: 79%

Months with the highest relative humidity are March and April (83%).
The month with the lowest relative humidity is August (75%).

Average rainfall in December - Santos, Brazil
  • Average rainfall in December: 210.9mm

The wettest month (with the highest rainfall) is January (255.9mm).
The driest month (with the lowest rainfall) is August (78.4mm).

Average rainfall days in December - Santos, Brazil
  • Average rainfall days in December: 14 days

The month with the highest number of rainy days is December (14 days).
Months with the lowest number of rainy days are June, July and August (8 days).

Average sea temperature in December - Santos, Brazil
  • Average sea temperature in December: 24.8°C

The best month for swimming (with the highest average sea temperature) is February (27°C).
The coldest month (with the lowest average sea temperature) is September (20.7°C).

Average daylight in December / Average sunshine in December - Santos, Brazil
  • Average daylight in December: 13.6h

The month with the longest days is December (Average daylight: 13.6h).
The month with shortest days is June (Average daylight: 10.7h).

  • Average sunshine in December: 4.3h

The month with most sunshine is February (Average sunshine: 5.3h).
The month with least sunshine is September (Average sunshine: 2.9h).