nomadseason

December Weather in Constancia, Portugal

Last updated: August 27, 2025

In December, the average temperature in Constancia, Portugal hovers around 11°C (52°F), with a range that dips to a brisk -1°C (30°F) and peaks at a comfortable 20°C (67°F). Expect 68 mm (2.7 in) of precipitation spread over 8 days, contributing to an average humidity of 85%. Prepare for a cool and damp month ahead!

December Temperature in Constancia

In December in Constancia, the average temperature is 11°C (52°F). The maximum can reach 20°C (67°F), while the minimum can dip as low as -1°C (30°F). This unpredictable weather makes it essential for travelers to pack layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Constancia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Constancia, December typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (67°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec485355586568737471645552
Data source: Temperature data for Constancia generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Constancia

In Constancia in December, the precipitation amount is 68 mm (2.7 in) spread over 8 days.

December Precipitation Trends in Constancia

The chart displays monthly precipitation patterns in Constancia, 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 Constancia, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4261949447195730639468
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Constancia

In Constancia in December, humidity is 85%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel quite uncomfortable as the air feels heavy and can sap your energy.

December Average Humidity in Constancia

This chart illustrates the average monthly humidity levels in Constancia, 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 Constancia is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Constancia

In Constancia in December, 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 Constancia, you can check the information here.

Maximum UV Index Levels in Constancia for December

The chart shows the monthly maximum UV Index (UVI) for Constancia 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 Constancia typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111098643
Data source: Constancia 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 Constancia Compares to Other Months

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

This table compares monthly weather conditions in Constancia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)42 mm (1.7 inches)85%moderate
February Weather12°C (53°F)61 mm (2.4 inches)75%moderate
March Weather13°C (55°F)94 mm (3.7 inches)72%high
April Weather15°C (59°F)94 mm (3.7 inches)70%very high
May Weather19°C (66°F)46 mm (1.8 inches)70%very high
June Weather20°C (69°F)19 mm (0.7 inches)63%extreme
July Weather23°C (73°F)5 mm (0.2 inches)60%very high
August Weather23°C (74°F)7 mm (0.3 inches)60%very high
September Weather22°C (71°F)30 mm (1.2 inches)67%very high
October Weather18°C (65°F)63 mm (2.5 inches)74%high
November Weather13°C (55°F)94 mm (3.7 inches)83%moderate
December Weather11°C (52°F)68 mm (2.7 inches)85%moderate

Compare Constancia's Climate with Cities Worldwide