January weather forecast
Ribeirão Preto, Brazil

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Weather in January

The weather in January in Ribeirão Preto, Brazil, harbors a humid tropical climate, seen throughout the significant rainfall and fairly high temperatures. The city experiences an upward trend in both average daily high and low temperatures during this month. Comparatively, January exhibits a higher relative humidity and more rainfall days than February. Strikingly, it tops the chart with a remarkable rainfall count of 238mm (9.37"), which is the highest precipitation total of the year. Typical January weather also includes moderate winds making it a rather breezy start of the year in Ribeirão Preto.

Temperature

Ribeirão Preto's weather, upon January's arrival, documents an average high-temperature of a still moderately hot 27.8°C (82°F), nearly identical to the prior month. During January, Ribeirão Preto records an average temperature of 19.6°C (67.3°F) at night.

Heat index

January's heat index is evaluated at a hot 33°C (91.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', offers an insight into how hot it feels when we factor in moisture content. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. 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 particularly important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.

Humidity

In Ribeirão Preto, the average relative humidity in January is 87%.

Rainfall

The month with the most rainfall in Ribeirão Preto is January, when the rain falls for 29.4 days and typically aggregates up to 238mm (9.37") of precipitation.

Daylight

The average length of the day in January in Ribeirão Preto is 13h and 15min.
On the first day of January in Ribeirão Preto, sunrise is at 05:32 and sunset at 18:56. On the last day of the month, sunrise is at 05:52 and sunset at 18:56 -03.

Sunshine

With an average of 7.2h of sunshine, January has the least sunshine of the year in Ribeirão Preto.

UV index

The months with the highest UV index are January, March, July through November, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: During January, 6 as the daily maximum UV index converts into the following advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.

Frequently asked questions

What is the usual temperature for Ribeirão Preto in January?

In January, the average high-temperature and low-temperature are 27.8°C (82°F) and 19.6°C (67.3°F) respectively. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in January is evaluated at 33°C (91.4°F).

What is the average humidity in January in Ribeirão Preto?

In Ribeirão Preto, Brazil, the average relative humidity in January is 87%.

What is the wettest month in Ribeirão Preto?

January is the month with the most rainfall in Ribeirão Preto. Rain falls for 29.4 days and accumulates 238mm (9.37") of precipitation.

How many days does it rain in January in Ribeirão Preto?

In January, in Ribeirão Preto, Brazil, the rain falls for 29.4 days. Throughout January, 238mm (9.37") of precipitation is accumulated.

How many hours of daylight does Ribeirão Preto have in January?

In January, the average day length in Ribeirão Preto is 13h and 15min.

When is the sunrise / sunset in January in Ribeirão Preto?

In January, on the first day of the month, sunrise is at 05:32 and sunset at 18:56. On the last day of the month, in Ribeirão Preto, sunrise is at 05:52 and sunset at 18:56 -03.

What is the month with the least sunshine in Ribeirão Preto?

With an average of 7.2h of sunshine, January has the least sunshine of the year in Ribeirão Preto, Brazil.

How long on average sun shines in January in Ribeirão Preto?

In Ribeirão Preto, the average sunshine duration in January is 7.2h.

When is the highest UV index in Ribeirão Preto?

The months with the highest UV index in Ribeirão Preto are January, March, July through November, with an average maximum UV index of 6.

How high is the UV index in January in Ribeirão Preto?

The average daily maximum UV index in January is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.

Average temperature in January
Ribeirão Preto, Brazil

Average temperature in January - Ribeirão Preto, Brazil
  • Average high temperature in January: 27.8°C

The warmest month (with the highest average high temperature) is September (31.1°C).
The month with the lowest average high temperature is June (24.2°C).

  • Average low temperature in January: 19.6°C

The month with the highest average low temperature is December (19.9°C).
The coldest month (with the lowest average low temperature) is June (14.3°C).

Average pressure in January
Ribeirão Preto, Brazil

Average pressure in January - Ribeirão Preto, Brazil
  • Average pressure in January: 1012.5mbar

The month with the highest atmospheric pressure is July (1019.3mbar).
The month with the lowest atmospheric pressure is December (1011.3mbar).

Average wind speed in January
Ribeirão Preto, Brazil

Average wind speed in January - Ribeirão Preto, Brazil
  • Average wind speed in January: 6.7km/h

The windiest month (with the highest average wind speed) is September (8.9km/h).
The calmest month (with the lowest average wind speed) is February (6.2km/h).

Average humidity in January
Ribeirão Preto, Brazil

Average humidity in January - Ribeirão Preto, Brazil
  • Average humidity in January: 87%

The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is September (54%).

Average rainfall in January
Ribeirão Preto, Brazil

Average rainfall in January - Ribeirão Preto, Brazil
  • Average rainfall in January: 238mm

The wettest month (with the highest rainfall) is January (238mm).
The driest month (with the least rainfall) is August (11mm).

Average rainfall days in January
Ribeirão Preto, Brazil

Average rainfall days in January - Ribeirão Preto, Brazil
  • Average rainfall days in January: 29.4 days

The month with the highest number of rainy days is December (29.7 days).
The month with the least rainy days is August (4.6 days).

Average daylight in January /
Average sunshine in January
Ribeirão Preto, Brazil

Average daylight in January / Average sunshine in January - Ribeirão Preto, Brazil
  • Average daylight in January: 13h and 1min

The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).

  • Average sunshine in January: 7h and 1min

The month with the most sunshine is September (Average sunshine: 9h and 24min).
The month with the least sunshine is January (Average sunshine: 7h and 12min).

Average sunshine days in January
Ribeirão Preto, Brazil

Average sunshine days in January - Ribeirão Preto, Brazil
  • Average sunshine days in January: 0.9 days

The month with the most sunshine days is August (26 days).
The month with the least sunshine days is December (0.5 days).

Average UV index in January
Ribeirão Preto, Brazil

Average UV index in January - Ribeirão Preto, Brazil
  • Average UV index in January: 6

The months with the highest UV index are January, March, July, August, September, October and November (UV index 6).
The months with the lowest UV index are February, April, May, June and December (UV index 5).

Average cloud cover in January
Ribeirão Preto, Brazil

Average cloud cover in January - Ribeirão Preto, Brazil
  • Average cloud cover in January: 55

The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 15).

Average visibility in January
Ribeirão Preto, Brazil

Average visibility in January - Ribeirão Preto, Brazil
  • Average visibility in January: 7km

The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March, April and May (7km).

Ribeirão Preto, Brazil

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