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December Weather in Santa Helena, Brazil

Last updated: August 22, 2025

In December, the average temperature in Santa Helena, Brazil is a warm 28°C (82°F). Expect a range from a pleasant 22°C (72°F) to a peak of 36°C (96°F). During this time, the area experiences approximately 102 mm (4.0 in) of precipitation over 18 days, contributing to the average humidity level of a humid 82%.

December Temperature in Santa Helena

In December in Santa Helena, the average temperature is 28°C (82°F). Maximums can reach 36°C (96°F), while minimums can be as low as 22°C (72°F). This makes Santa Helena an ideal destination for warm-weather activities and exploring the outdoors.

December Weather in Santa Helena: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Helena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Helena, December typically has an average temperature of 28°C (82°F), with highs reaching up to 36°C (96°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec807979798080798081828282
Data source: Temperature data for Santa Helena 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 Santa Helena

In Santa Helena in December, the precipitation amount is 102 mm (4.0 in) over the course of 18 days.

December Precipitation Trends in Santa Helena

The chart displays monthly precipitation patterns in Santa Helena, 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 Santa Helena, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec1863714134162511408846263157102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santa Helena

In Santa Helena in December humidity is 82%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, dense blanket, making outdoor activities a challenge and necessitating frequent breaks to stay hydrated.

December Average Humidity in Santa Helena

This chart illustrates the average monthly humidity levels in Santa Helena, 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 Santa Helena is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%93%91%84%74%61%55%56%61%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Helena

In Santa Helena in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Santa Helena.

Maximum UV Index Levels in Santa Helena for December

The chart shows the monthly maximum UV Index (UVI) for Santa Helena 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 Santa Helena typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151416161312111313131313
Data source: Santa Helena 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 Santa Helena Compares to Other Months

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

This table compares monthly weather conditions in Santa Helena, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)186 mm (7.3 inches)92%extreme
February Weather26°C (80°F)371 mm (14.6 inches)90%extreme
March Weather26°C (79°F)413 mm (16.3 inches)88%extreme
April Weather26°C (80°F)416 mm (16.4 inches)93%extreme
May Weather27°C (80°F)251 mm (9.9 inches)91%extreme
June Weather27°C (80°F)140 mm (5.5 inches)84%extreme
July Weather26°C (80°F)88 mm (3.5 inches)74%extreme
August Weather27°C (80°F)46 mm (1.8 inches)61%extreme
September Weather27°C (82°F)26 mm (1.0 inches)55%extreme
October Weather28°C (83°F)31 mm (1.2 inches)56%extreme
November Weather28°C (83°F)57 mm (2.2 inches)61%extreme
December Weather28°C (82°F)102 mm (4.0 inches)82%extreme

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