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December Weather in Estarreja, Portugal

Last updated: August 27, 2025

In December, the average temperature in Estarreja, Portugal hovers around 10°C (51°F), with a minimum of -1°C (30°F) and a maximum of 19°C (67°F). Expect 187 mm (7.3 in) of precipitation over approximately 14 days, contributing to an average humidity level of 87%.

December Temperature in Estarreja

In December in Estarreja, the average temperature is 10°C (51°F). Maximums can reach 19°C (67°F), while minimums can drop to as low as -1°C (30°F). This makes it essential for travelers to pack layers to accommodate the fluctuating temperatures.

December Weather in Estarreja: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Estarreja, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Estarreja, December typically has an average temperature of 10°C (51°F), with highs reaching up to 19°C (67°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec485153576264696967615451
Data source: Temperature data for Estarreja generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Estarreja

In Estarreja in December, the precipitation amount is 187 mm (7.3 in) over the course of 14 days.

December Precipitation Trends in Estarreja

The chart displays monthly precipitation patterns in Estarreja, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Estarreja, December typically receives around 187 mm (7.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec881341411448052211846113161187
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Estarreja

In Estarreja in December humidity is 87%. With an average temperature of 10°C (51°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities uncomfortable and sticky, and often requiring frequent breaks to stay hydrated and cool.

December Average Humidity in Estarreja

This chart illustrates the average monthly humidity levels in Estarreja, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Estarreja is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%78%79%78%71%63%64%71%79%86%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Estarreja

In Estarreja in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Estarreja, you can visit Hourly UV Index in Estarreja.

Maximum UV Index Levels in Estarreja for December

The chart shows the monthly maximum UV Index (UVI) for Estarreja in December, 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 December, the maximum UV index in Estarreja typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098642
Data source: Estarreja December 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 December Weather in Estarreja Compares to Other Months

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

This table compares monthly weather conditions in Estarreja, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)88 mm (3.5 inches)87%low
February Weather11°C (52°F)134 mm (5.3 inches)81%moderate
March Weather12°C (54°F)141 mm (5.6 inches)78%high
April Weather14°C (57°F)144 mm (5.7 inches)79%very high
May Weather17°C (62°F)80 mm (3.1 inches)78%very high
June Weather18°C (65°F)52 mm (2.0 inches)71%extreme
July Weather20°C (69°F)21 mm (0.8 inches)63%very high
August Weather21°C (69°F)18 mm (0.7 inches)64%very high
September Weather20°C (68°F)46 mm (1.8 inches)71%very high
October Weather16°C (62°F)113 mm (4.5 inches)79%high
November Weather12°C (54°F)161 mm (6.4 inches)86%moderate
December Weather10°C (51°F)187 mm (7.3 inches)87%low

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