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December Weather in Nisa, Portugal

Last updated: August 27, 2025

In December, the average temperature in Nisa, Portugal hovers around 10°C (51°F). While you may experience chilly lows of -1°C (30°F), warm afternoons can reach up to 19°C (67°F). Be prepared for some moisture, as 77 mm (3.0 in) of precipitation is expected over 8 days. With an average humidity level of 85%, it’s advisable to dress in layers and plan accordingly!

December Temperature in Nisa

In December in Nisa, 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 Nisa: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Nisa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nisa, 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).
JanFebMarAprMayJunJulAugSepOctNovDec475254586670757672655551
Data source: Temperature data for Nisa 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 Nisa

In Nisa in December, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.

December Precipitation Trends in Nisa

The chart displays monthly precipitation patterns in Nisa, 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 Nisa, December typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4257979239165533618877
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Nisa

In Nisa in December, humidity is 85%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill enveloping you, making travel quite uncomfortable as your clothes cling to your skin and the air feels heavy, often leaving you longing for a dry, warmer environment.

December Average Humidity in Nisa

This chart illustrates the average monthly humidity levels in Nisa, 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 Nisa 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 Nisa

In Nisa 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 Nisa, you can check the information here.

Maximum UV Index Levels in Nisa for December

The chart shows the monthly maximum UV Index (UVI) for Nisa 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 Nisa typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689111098643
Data source: Nisa 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 Nisa Compares to Other Months

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

This table compares monthly weather conditions in Nisa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)42 mm (1.6 inches)85%moderate
February Weather11°C (52°F)57 mm (2.3 inches)75%moderate
March Weather12°C (54°F)97 mm (3.8 inches)72%high
April Weather14°C (58°F)92 mm (3.6 inches)70%very high
May Weather19°C (66°F)39 mm (1.5 inches)70%very high
June Weather21°C (70°F)15 mm (0.6 inches)63%extreme
July Weather24°C (75°F)5 mm (0.2 inches)60%very high
August Weather25°C (77°F)5 mm (0.2 inches)60%very high
September Weather22°C (73°F)33 mm (1.3 inches)67%very high
October Weather18°C (65°F)61 mm (2.4 inches)74%high
November Weather13°C (55°F)88 mm (3.5 inches)83%moderate
December Weather10°C (51°F)77 mm (3.0 inches)85%moderate

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