January Weather in Arraiolos, Portugal

Last updated: August 27, 2025

In Arraiolos, Portugal, the average temperature for January is a cool 9°C (49°F), with a minimum dipping to -2°C (28°F) and a pleasant maximum reaching up to 21°C (70°F). Expect about 34 mm (1.3 in) of precipitation over 5 days, contributing to an average humidity level of 85%.

January Temperature in Arraiolos

In January in Arraiolos, the average temperature is 9°C (49°F), with maximums reaching 21°C (70°F) and minimums dropping as low as -2°C (28°F). This weather makes it a versatile time for travelers to enjoy both outdoor activities and cozy indoor experiences.

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

The chart illustrates January temperature patterns in Arraiolos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arraiolos, January typically has an average temperature of 9°C (49°F), with highs reaching up to 21°C (70°F) and lows dropping to around -2°C (28°F).

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

January Precipitation in Arraiolos

In Arraiolos in January, the precipitation amount is 34 mm (1.3 in) over the course of 5 days.

January Precipitation Trends in Arraiolos

The chart displays monthly precipitation patterns in Arraiolos, 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 Arraiolos, January typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 5 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 Arraiolos

In Arraiolos in January humidity is 85%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making every step outside a challenge as the moisture in the air weighs heavily and lingers, transforming even simple outings into a quest for comfort.

January Average Humidity in Arraiolos

This chart illustrates the average monthly humidity levels in Arraiolos, 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 Arraiolos is approximately 85%, 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 Arraiolos

In Arraiolos in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Arraiolos, you can check the information here.

Maximum UV Index Levels in Arraiolos for January

The chart shows the monthly maximum UV Index (UVI) for Arraiolos 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 Arraiolos typically reaches 3, which falls under the moderate exposure category.

Data source: Arraiolos 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 Arraiolos Compares to Other Months

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

This table compares monthly weather conditions in Arraiolos, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	34 mm (1.3 inches)	85%	moderate
February Weather	12°C (53°F)	51 mm (2.0 inches)	75%	moderate
March Weather	13°C (55°F)	91 mm (3.6 inches)	72%	high
April Weather	15°C (59°F)	88 mm (3.5 inches)	70%	very high
May Weather	19°C (66°F)	39 mm (1.5 inches)	70%	very high
June Weather	21°C (70°F)	15 mm (0.6 inches)	63%	extreme
July Weather	24°C (75°F)	5 mm (0.2 inches)	60%	very high
August Weather	24°C (76°F)	5 mm (0.2 inches)	60%	very high
September Weather	23°C (73°F)	25 mm (1.0 inches)	67%	very high
October Weather	19°C (66°F)	43 mm (1.7 inches)	74%	high
November Weather	13°C (56°F)	68 mm (2.7 inches)	83%	moderate
December Weather	11°C (52°F)	63 mm (2.5 inches)	85%	moderate