January Weather in Porto, Brazil

Last updated: August 22, 2025

In January, the average temperature in Porto, Brazil is a warm 28°C (82°F), with comfortable lows of 22°C (72°F) and potential highs reaching up to 38°C (101°F). Expect a bit of rain, with 194 mm (7.6 in) of precipitation spread over about 18 days. Humidity levels are quite high, averaging around 90%, so be prepared for a muggy atmosphere!

January Temperature in Porto

In January in Porto, the average temperature is 28°C (82°F), with maximums reaching up to 38°C (101°F) and minimums dropping as low as 22°C (72°F). This makes it an ideal destination for travelers seeking warm weather and plenty of sunshine.

January Weather in Porto: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Porto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porto, January typically has an average temperature of 28°C (82°F), with highs reaching up to 38°C (101°F) and lows dropping to around 22°C (72°F).

Data source: Temperature data for Porto generated using information from the Copernicus Climate Change Service.

January Precipitation in Porto

In Porto in January, the precipitation amount is 194 mm (7.6 in) over the course of 18 days.

January Precipitation Trends in Porto

The chart displays monthly precipitation patterns in Porto, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Porto, January typically receives around 194 mm (7.6 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Porto

In Porto in January, humidity is 90%. With an average temperature of 28°C (82°F), this humidity feels like a heavy blanket enveloping you, making travel feel stifling and exhausting, as each step feels laborious and sweat clings to your skin.

January Average Humidity in Porto

This chart illustrates the average monthly humidity levels in Porto, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Porto is approximately 90%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Porto

In Porto in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Porto, you can check here.

Maximum UV Index Levels in Porto for January

The chart shows the monthly maximum UV Index (UVI) for Porto in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Porto typically reaches 14, which falls under the extreme exposure category.

Data source: Porto January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Porto Compares to Other Months

Weather in Porto varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Porto, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Porto, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (82°F)	194 mm (7.6 inches)	90%	extreme
February Weather	27°C (81°F)	315 mm (12.4 inches)	91%	extreme
March Weather	27°C (80°F)	409 mm (16.1 inches)	92%	extreme
April Weather	27°C (81°F)	312 mm (12.3 inches)	93%	extreme
May Weather	27°C (81°F)	149 mm (5.9 inches)	88%	extreme
June Weather	28°C (82°F)	22 mm (0.9 inches)	75%	extreme
July Weather	28°C (82°F)	18 mm (0.7 inches)	52%	extreme
August Weather	29°C (84°F)	3 mm (0.1 inches)	42%	extreme
September Weather	30°C (86°F)	2 mm (0.1 inches)	36%	extreme
October Weather	30°C (87°F)	7 mm (0.3 inches)	35%	extreme
November Weather	30°C (86°F)	61 mm (2.4 inches)	43%	extreme
December Weather	29°C (85°F)	69 mm (2.7 inches)	76%	extreme