Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
January's presence records an average high-temperature of a tropical 30.1°C (86.2°F), closely mirroring December's climate. The average low-temperature of 21.6°C (70.9°F) is witnessed during January.Heat index
January's average heat index is calculated to be a very hot 38°C (100.4°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
In January, the average relative humidity is 81%.Rainfall
January is the month with the most rainfall. Rain falls for 23.6 days and accumulates 148mm (5.83") of precipitation.Daylight
The average length of the day in January is 13h and 21min.On the first day of January, sunrise is at 05:11 and sunset at 18:42. On the last day of the month, sunrise is at 05:32 and sunset at 18:41 -03.
Sunshine
The average sunshine in January is 8.1h.UV index
In Nilópolis, the average daily maximum UV index in January is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: During January, 6 as the daily maximum UV index converts into the following advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is January?
What is the average humidity in January?
What is the rainiest month?
How many days does it rain in January?
How many hours of daylight does Nilópolis have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Nilópolis have in January?
What is the UV index intensity in January?
Average temperature in January
Nilópolis, Brazil
- Average high temperature in January: 30.1°C
The warmest month (with the highest average high temperature) is February (30.3°C).
The month with the lowest average high temperature is July (24°C).
- Average low temperature in January: 21.6°C
The month with the highest average low temperature is January (21.6°C).
The coldest month (with the lowest average low temperature) is August (16.1°C).
Average pressure in January
Nilópolis, Brazil
- Average pressure in January: 1012.9mbar
The month with the highest atmospheric pressure is July (1020.5mbar).
The month with the lowest atmospheric pressure is December (1012.1mbar).
Average wind speed in January
Nilópolis, Brazil
- Average wind speed in January: 6.6km/h
The windiest month (with the highest average wind speed) is September (7.8km/h).
The calmest month (with the lowest average wind speed) is March (6km/h).
Average humidity in January
Nilópolis, Brazil
- Average humidity in January: 81%
The months with the highest relative humidity are March and April (84%).
The month with the lowest relative humidity is August (77%).
Average rainfall in January
Nilópolis, Brazil
- Average rainfall in January: 148mm
The wettest month (with the highest rainfall) is January (148mm).
The driest month (with the least rainfall) is June (29mm).
Average rainfall days in January
Nilópolis, Brazil
- Average rainfall days in January: 23.6 days
The month with the highest number of rainy days is December (25.7 days).
The month with the least rainy days is August (10.8 days).
Average daylight in January /
Average sunshine in January
Nilópolis, Brazil
- Average daylight in January: 13h and 2min
The month with the longest days is December (Average daylight: 13h and 30min).
The month with the shortest days is June (Average daylight: 10h and 48min).
- Average sunshine in January: 8h and 1min
The month with the most sunshine is February (Average sunshine: 8h and 30min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in January
Nilópolis, Brazil
- Average sunshine days in January: 5.3 days
The month with the most sunshine days is August (17.9 days).
The month with the least sunshine days is December (3.9 days).
Average UV index in January
Nilópolis, Brazil
- Average UV index in January: 6
The month with the highest UV index is December (UV index 7).
The months with the lowest UV index are April, May, July and September (UV index 5).
Average cloud cover in January
Nilópolis, Brazil
- Average cloud cover in January: 40
The month with the most cloud cover is November (Cloud cover 55).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in January
Nilópolis, Brazil
- Average visibility in January: 8km
The months with the highest visibility are February, June, July, August, September and October (9km).
The months with the lowest visibility are January, March, April, May, November and December (8km).
