December weather forecastPrincesa Isabel, Brazil
December
Weather in December
The first month of the summer, December, is also a hot month in Princesa Isabel, Brazil, with an average temperature varying between 33.3°C (91.9°F) and 22.1°C (71.8°F).Temperature
On the advent of December, Princesa Isabel's average high-temperature exhibits a minor adjustment to a still tropical 33.3°C (91.9°F) from November's 33.8°C (92.8°F). Princesa Isabel in December experiences a low-temperature average of 22.1°C (71.8°F).Heat index
December's average heat index is evaluated at a fiery hot 38°C (100.4°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.Know that the heat index computations account for shaded terrains and slight winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.
Humidity
In December, the average relative humidity is 53%.Rainfall
In Princesa Isabel, during December, the rain falls for 11.7 days and regularly aggregates up to 37mm (1.46") of precipitation. Throughout the year, there are 140.8 rainfall days, and 430mm (16.93") of precipitation is accumulated.Daylight
With an average of 12h and 36min of daylight, December has the longest days of the year in Princesa Isabel.On the first day of December, sunrise is at 05:04 and sunset at 17:37. On the last day of the month, sunrise is at 05:18 and sunset at 17:52 -03.
Sunshine
In Princesa Isabel, the average sunshine in December is 9.1h.UV index
The months with the highest UV index are February, March, September through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 7 during December leads to these advisories:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Princesa Isabel, Brazil
- Average high temperature in December: 33.3°C
The warmest month (with the highest average high temperature) is November (33.8°C).
The month with the lowest average high temperature is July (28.1°C).
- Average low temperature in December: 22.1°C
The month with the highest average low temperature is November (22.3°C).
The coldest months (with the lowest average low temperature) are July and August (17.3°C).
Average pressure in December
Princesa Isabel, Brazil
- Average pressure in December: 1011.1mbar
The month with the highest atmospheric pressure is July (1016.3mbar).
The month with the lowest atmospheric pressure is November (1010.8mbar).
Average wind speed in December
Princesa Isabel, Brazil
- Average wind speed in December: 14km/h
The windiest month (with the highest average wind speed) is September (18.4km/h).
The calmest month (with the lowest average wind speed) is March (10.6km/h).
Average humidity in December
Princesa Isabel, Brazil
- Average humidity in December: 53%
The month with the highest relative humidity is May (75%).
The month with the lowest relative humidity is November (49%).
Average rainfall in December
Princesa Isabel, Brazil
- Average rainfall in December: 37mm
The wettest month (with the highest rainfall) is March (88mm).
The driest month (with the least rainfall) is September (1mm).
Average rainfall days in December
Princesa Isabel, Brazil
- Average rainfall days in December: 11.7 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is September (2.5 days).
Average daylight in December /
Average sunshine in December
Princesa Isabel, Brazil
- Average daylight in December: 12h and 36min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in December: 9h and 6min
The month with the most sunshine is October (Average sunshine: 9h and 24min).
The month with the least sunshine is July (Average sunshine: 7h and 0min).
Average sunshine days in December
Princesa Isabel, Brazil
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is September (25.6 days).
The month with the least sunshine days is February (8 days).
Average UV index in December
Princesa Isabel, Brazil
- Average UV index in December: 7
The months with the highest UV index are February, March, September, October, November and December (UV index 7).
The months with the lowest UV index are January, April, May, June, July and August (UV index 6).
Average cloud cover in December
Princesa Isabel, Brazil
- Average cloud cover in December: 30
The month with the most cloud cover is July (Cloud cover 47).
The months with the least cloud cover are September and October (Cloud cover 24).
Average visibility in December
Princesa Isabel, Brazil
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The month with the lowest visibility is May (8km).
