January weather forecastSão Jerônimo, Brazil

January

Weather in January

January, the same as December, is another warm summer month in São Jerônimo, Brazil, with an average temperature varying between 29.5°C (85.1°F) and 18.8°C (65.8°F).

Temperature

January's advent presents an average high-temperature of a still warm 29.5°C (85.1°F), indicating a slight variation from the conditions of the previous month. São Jerônimo experiences an average temperature drop to a comfortable 18.8°C (65.8°F) during January nights.

Heat index

January's average heat index is estimated at a sweltering 36°C (96.8°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In January, the average relative humidity is 78%.

Rainfall

January is the month with the most rainfall. Rain falls for 16.9 days and accumulates 46mm (1.81") of precipitation.

Daylight

The average length of the day in January in São Jerônimo is 13h and 49min.
On the first day of January in São Jerônimo, Brazil, sunrise is at 05:29 and sunset at 19:31. On the last day of the month, sunrise is at 05:54 and sunset at 19:26 -03.

Sunshine

In January, the average sunshine in São Jerônimo, Brazil, is 8.4h.

UV index

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In January, a regular UV index of 6 translates into these guidelines:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The average high-temperature, in January, in São Jerônimo, is 29.5°C (85.1°F), while the average low-temperature is 18.8°C (65.8°F). In January, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is estimated at 36°C (96.8°F).

The average relative humidity in January in São Jerônimo, Brazil, is 78%.

January is the month with the most rainfall in São Jerônimo. Rain falls for 16.9 days and accumulates 46mm (1.81") of precipitation.

In São Jerônimo, Brazil, in January, during 16.9 rainfall days, 46mm (1.81") of precipitation is typically accumulated.

In São Jerônimo, the average day length in January is 13h and 49min.

On the first day of January in São Jerônimo, Brazil, sunrise is at 05:29 and sunset at 19:31. On the last day of the month, sunrise is at 05:54 and sunset at 19:26 -03.

The average sunshine duration in January is 8.4h.

January through March, November and December, with an average maximum UV index of 6, are months with the highest UV index in São Jerônimo, Brazil.

In São Jerônimo, the average daily maximum UV index in January is 6. A UV Index of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

28.8°C

29.5°C

29.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.4km/h

10.3km/h

10.1km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

14.1

11.6

11.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
São Jerônimo, Brazil

Average high temperature in January: 29.5°C

The warmest month (with the highest average high temperature) is February (29.7°C).
The month with the lowest average high temperature is July (18.3°C).

Average low temperature in January: 18.8°C

The months with the highest average low temperature are January and February (18.8°C).
The coldest month (with the lowest average low temperature) is July (9.7°C).

Average pressure in January
São Jerônimo, Brazil

Average pressure in January: 1012.3mbar

The month with the highest atmospheric pressure is July (1020mbar).
The month with the lowest atmospheric pressure is December (1011.4mbar).

Average wind speed in January
São Jerônimo, Brazil

Average wind speed in January: 9.5km/h

The windiest month (with the highest average wind speed) is August (10.3km/h).
The calmest month (with the lowest average wind speed) is May (8.9km/h).

Average humidity in January
São Jerônimo, Brazil

Average humidity in January: 78%

The months with the highest relative humidity are May, June and July (84%).
The month with the lowest relative humidity is December (76%).

Average rainfall in January
São Jerônimo, Brazil

Average rainfall in January: 46mm

The wettest month (with the highest rainfall) is January (46mm).
The driest month (with the least rainfall) is September (18mm).

Average rainfall days in January
São Jerônimo, Brazil

Average rainfall days in January: 16.9 days

The month with the highest number of rainy days is January (16.9 days).
The month with the least rainy days is June (9.4 days).

Average daylight in January /
Average sunshine in January
São Jerônimo, Brazil

Average daylight in January: 13h and 48min

The month with the longest days is December (Average daylight: 14h and 0min).
The month with the shortest days is June (Average daylight: 10h and 12min).

Average sunshine in January: 8h and 24min

The month with the most sunshine is December (Average sunshine: 8h and 30min).
The month with the least sunshine is September (Average sunshine: 7h and 12min).

Average sunshine days in January
São Jerônimo, Brazil

Average sunshine days in January: 11.6 days

The month with the most sunshine days is July (18.9 days).
The month with the least sunshine days is January (11.6 days).

Average UV index in January
São Jerônimo, Brazil

Average UV index in January: 6

The months with the highest UV index are January, February, March, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).

Average cloud cover in January
São Jerônimo, Brazil

Average cloud cover in January: 36

The month with the most cloud cover is September (Cloud cover 40).
The month with the least cloud cover is November (Cloud cover 31).

Average visibility in January
São Jerônimo, Brazil

Average visibility in January: 8km

The months with the highest visibility are February, April, June, July, August, November and December (9km).
The months with the lowest visibility are January, March, May, September and October (8km).