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December Weather in Santo Izidoro, Portugal

Last updated: August 27, 2025

In Santo Izidoro, Portugal, the average temperature in December hovers around 9°C (49°F). Expect a chill in the air, with minimums dipping to -2°C (29°F) and highs reaching up to 18°C (64°F). Prepare for 222 mm (8.8 in) of precipitation over approximately 15 days, contributing to an average humidity of 87%.

December Temperature in Santo Izidoro

In December in Santo Izidoro, the average temperature is 9°C (49°F). The maximum can reach 18°C (64°F), and the minimum can be as low as -2°C (29°F). Be sure to pack layers to stay comfortable during your travels in this variable climate.

December Weather in Santo Izidoro: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santo Izidoro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Izidoro, December typically has an average temperature of 9°C (49°F), with highs reaching up to 18°C (64°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec465052566264697067605249
Data source: Temperature data for Santo Izidoro 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 Santo Izidoro

In Santo Izidoro in December, the precipitation amount is 222 mm (8.8 in) recorded over a span of 15 days.

December Precipitation Trends in Santo Izidoro

The chart displays monthly precipitation patterns in Santo Izidoro, 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 Santo Izidoro, December typically receives around 222 mm (8.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec1041611661648761282148120177222
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santo Izidoro

In Santo Izidoro in December humidity is 87%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making travel uncomfortable and leaving you yearning for a dry breeze to refresh your spirit.

December Average Humidity in Santo Izidoro

This chart illustrates the average monthly humidity levels in Santo Izidoro, 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 Santo Izidoro 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 Santo Izidoro

In Santo Izidoro 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 Santo Izidoro, you can visit Hourly UV Index in Santo Izidoro.

Maximum UV Index Levels in Santo Izidoro for December

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

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

This table compares monthly weather conditions in Santo Izidoro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)104 mm (4.1 inches)87%low
February Weather10°C (50°F)161 mm (6.3 inches)81%moderate
March Weather11°C (52°F)166 mm (6.5 inches)78%high
April Weather13°C (56°F)164 mm (6.5 inches)79%very high
May Weather16°C (62°F)87 mm (3.4 inches)78%very high
June Weather18°C (65°F)61 mm (2.4 inches)71%extreme
July Weather21°C (70°F)28 mm (1.1 inches)63%very high
August Weather21°C (70°F)20 mm (0.8 inches)64%very high
September Weather19°C (67°F)48 mm (1.9 inches)71%very high
October Weather16°C (60°F)120 mm (4.7 inches)79%high
November Weather11°C (52°F)177 mm (7.0 inches)86%moderate
December Weather9°C (49°F)222 mm (8.8 inches)87%low

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