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
The month of January, characterized by an average high of 29.2°C (84.6°F) and a low of 21.3°C (70.3°F), is recognized as the warmest.Heat index
January's heat index is calculated to be a sweltering 36°C (96.8°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. 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 are particularly relevant to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
The average relative humidity in January in Petrópolis is 82%.Rainfall
The wettest months in Petrópolis are January and November, with an average 155mm (6.1") of rainfall.Daylight
In Petrópolis, the average length of the day in January is 13h and 20min.On the first day of the month, sunrise is at 05:11 and sunset at 18:40. On the last day of January, sunrise is at 05:32 and sunset at 18:39 -03.
Sunshine
The average sunshine in January is 7.9h.UV index
January through March, August, October through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 6 in January translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in Petrópolis?
How hot is it in Petrópolis in January?
What is the average humidity in January in Petrópolis?
What is the wettest month in Petrópolis?
How many days does it rain in January in Petrópolis?
What is the average length of the day in January in Petrópolis?
When is the sunrise / sunset in January in Petrópolis?
How many hours of sunshine does Petrópolis have in January?
When is the highest UV index in Petrópolis?
What is the UV index intensity in January in Petrópolis?
Average temperature in January
Petrópolis, Brazil
- Average high temperature in January: 29.2°C
The warmest month (with the highest average high temperature) is January (29.2°C).
The month with the lowest average high temperature is June (23.4°C).
- Average low temperature in January: 21.3°C
The month with the highest average low temperature is January (21.3°C).
The coldest month (with the lowest average low temperature) is June (16°C).
Average pressure in January
Petrópolis, Brazil
- Average pressure in January: 1012.8mbar
The month with the highest atmospheric pressure is July (1020.6mbar).
The month with the lowest atmospheric pressure is December (1012mbar).
Average wind speed in January
Petrópolis, Brazil
- Average wind speed in January: 6.7km/h
The windiest month (with the highest average wind speed) is September (8.1km/h).
The calmest month (with the lowest average wind speed) is March (6.2km/h).
Average humidity in January
Petrópolis, Brazil
- Average humidity in January: 82%
The months with the highest relative humidity are March, April and November (85%).
The month with the lowest relative humidity is August (78%).
Average rainfall in January
Petrópolis, Brazil
- Average rainfall in January: 155mm
The wettest months (with the highest rainfall) are January and November (155mm).
The driest month (with the least rainfall) is July (31mm).
Average rainfall days in January
Petrópolis, Brazil
- Average rainfall days in January: 25.6 days
The month with the highest number of rainy days is December (26.8 days).
The month with the least rainy days is August (11.3 days).
Average daylight in January /
Average sunshine in January
Petrópolis, 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: 7h and 5min
The month with the most sunshine is February (Average sunshine: 8h and 24min).
The months with the least sunshine are October and November (Average sunshine: 7h and 18min).
Average sunshine days in January
Petrópolis, Brazil
- Average sunshine days in January: 2.4 days
The month with the most sunshine days is August (17.2 days).
The month with the least sunshine days is December (2.2 days).
Average UV index in January
Petrópolis, Brazil
- Average UV index in January: 6
The months with the highest UV index are January, February, March, August, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July and September (UV index 5).
Average cloud cover in January
Petrópolis, Brazil
- Average cloud cover in January: 40
The month with the most cloud cover is November (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in January
Petrópolis, Brazil
- Average visibility in January: 9km
The months with the highest visibility are January, February, May, June, July, August, September and October (9km).
The months with the lowest visibility are March, April, November and December (8km).
