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 sea temperature 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
The introduction of December notes a subtle temperature variation to a still tropical 30.5°C (86.9°F) from November's 31.4°C (88.5°F). During December, São Caetano de Odivelas's temperature falls to a steady low-temperature average of 24.9°C (76.8°F).Heat index
The heat index in December is evaluated at a very hot 39°C (102.2°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Heat index determinations are made taking into account the shade and light air movements. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Perspiration is essential for the human body; it facilitates cooling through the process of sweat evaporation. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
The average relative humidity in December in São Caetano de Odivelas, Brazil, is 78%.Rainfall
In São Caetano de Odivelas, in December, it is raining for 24.7 days, with typically 172mm (6.77") of accumulated precipitation. In São Caetano de Odivelas, during the entire year, the rain falls for 315.6 days and collects up to 2313mm (91.06") of precipitation.Sea temperature
In São Caetano de Odivelas, in December, the average water temperature is 28.7°C (83.7°F).Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.
Daylight
The month with the longest days is December, with an average of 12h and 12min of daylight.On the first day of the month, sunrise is at 05:56 and sunset at 18:06. On the last day of December, sunrise is at 06:10 and sunset at 18:20 -03.
Sunshine
In São Caetano de Odivelas, the average sunshine in December is 8.3h.UV index
The months with the highest UV index are January, June through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 7 in December translates into the following instructions:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
Frequently asked questions
How hot is December in São Caetano de Odivelas?
What is the average humidity in December in São Caetano de Odivelas?
How many days does it rain in December in São Caetano de Odivelas?
What is the water temperature in December in São Caetano de Odivelas?
When are the longest days in São Caetano de Odivelas?
How many hours of daylight does São Caetano de Odivelas have in December?
When is the sunrise / sunset in December in São Caetano de Odivelas?
How many hours of sunshine does São Caetano de Odivelas have in December?
What are the months with the highest UV index in São Caetano de Odivelas?
What is the UV index reading in December in São Caetano de Odivelas?
Average temperature in December
São Caetano de Odivelas, Brazil
- Average high temperature in December: 30.5°C
The warmest month (with the highest average high temperature) is October (31.5°C).
The month with the lowest average high temperature is March (28.7°C).
- Average low temperature in December: 24.9°C
The month with the highest average low temperature is November (25.3°C).
The coldest month (with the lowest average low temperature) is July (23.9°C).
Average pressure in December
São Caetano de Odivelas, Brazil
- Average pressure in December: 1009.8mbar
The month with the highest atmospheric pressure is July (1012.7mbar).
The month with the lowest atmospheric pressure is November (1009.2mbar).
Average wind speed in December
São Caetano de Odivelas, Brazil
- Average wind speed in December: 13.9km/h
The windiest month (with the highest average wind speed) is November (14.7km/h).
The calmest month (with the lowest average wind speed) is May (9.9km/h).
Average humidity in December
São Caetano de Odivelas, Brazil
- Average humidity in December: 78%
The month with the highest relative humidity is April (87%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in December
São Caetano de Odivelas, Brazil
- Average rainfall in December: 172mm
The wettest month (with the highest rainfall) is March (359mm).
The driest month (with the least rainfall) is October (41mm).
Average rainfall days in December
São Caetano de Odivelas, Brazil
- Average rainfall days in December: 24.7 days
The month with the highest number of rainy days is March (30.7 days).
The months with the least rainy days are October and November (18.8 days).
Average sea temperature in December
São Caetano de Odivelas, Brazil
- Average sea temperature in December: 28.7°C
The best months for swimming (with the highest average sea temperature) are January, May, June, July, August and November (28.8°C).
The coldest month (with the lowest average sea temperature) is October (28.4°C).
Average daylight in December /
Average sunshine in December
São Caetano de Odivelas, Brazil
- Average daylight in December: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 6min).
- Average sunshine in December: 8h and 2min
The month with the most sunshine is October (Average sunshine: 10h and 24min).
The months with the least sunshine are February and April (Average sunshine: 6h and 48min).
Average sunshine days in December
São Caetano de Odivelas, Brazil
- Average sunshine days in December: 3.5 days
The month with the most sunshine days is October (8.8 days).
The months with the least sunshine days are February, March and April (0.2 days).
Average UV index in December
São Caetano de Odivelas, Brazil
- Average UV index in December: 7
The months with the highest UV index are January, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are February, March, April and May (UV index 6).
Average cloud cover in December
São Caetano de Odivelas, Brazil
- Average cloud cover in December: 42
The month with the most cloud cover is April (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 26).
Average visibility in December
São Caetano de Odivelas, Brazil
- Average visibility in December: 10km
The months with the highest visibility are August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June and July (9km).
São Caetano de Odivelas, Brazil
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