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December Weather in Grand Bay, United States

Last updated: June 24, 2025

In December, the average temperature in Grand Bay, United States hovers around 14°C (57°F), with a minimum dipping to 0°C (33°F) and a maximum reaching 26°C (78°F). This month typically sees 121 mm (4.8 in) of precipitation spread over 12 days, contributing to an average humidity of 87%. Be prepared for a mix of cool and mild days!

December Temperature in Grand Bay

In December in Grand Bay, the average temperature is 14°C (57°F). Maximums can reach 26°C (78°F), while minimums can drop as low as 0°C (33°F). This makes Grand Bay an ideal destination for travelers seeking a mix of mild days and cool evenings.

December Weather in Grand Bay: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Grand Bay, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand Bay, December typically has an average temperature of 14°C (57°F), with highs reaching up to 26°C (78°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec545964687580828279736157
Data source: Temperature data for Grand Bay 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 Grand Bay

In Grand Bay in December, the precipitation amount reaches 121 mm (4.8 in) over the course of 12 days.

December Precipitation Trends in Grand Bay

The chart displays monthly precipitation patterns in Grand Bay, 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 Grand Bay, December typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec951098612013124416320817013456121
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grand Bay

In Grand Bay in December humidity is 87%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making every breath feel heavy and sticky, which can be quite challenging for travelers exploring the city.

December Average Humidity in Grand Bay

This chart illustrates the average monthly humidity levels in Grand Bay, 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 Grand Bay is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grand Bay

In Grand Bay in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Grand Bay for better planning.

Maximum UV Index Levels in Grand Bay for December

The chart shows the monthly maximum UV Index (UVI) for Grand Bay 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 Grand Bay typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
Data source: Grand Bay 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 Grand Bay Compares to Other Months

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

This table compares monthly weather conditions in Grand Bay, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)95 mm (3.7 inches)82%moderate
February Weather15°C (59°F)109 mm (4.3 inches)80%very high
March Weather18°C (64°F)86 mm (3.4 inches)80%very high
April Weather20°C (68°F)120 mm (4.7 inches)78%extreme
May Weather24°C (76°F)131 mm (5.2 inches)73%extreme
June Weather27°C (81°F)244 mm (9.6 inches)71%extreme
July Weather28°C (82°F)163 mm (6.4 inches)79%extreme
August Weather28°C (82°F)208 mm (8.2 inches)78%extreme
September Weather26°C (80°F)170 mm (6.7 inches)80%very high
October Weather23°C (73°F)134 mm (5.3 inches)76%very high
November Weather16°C (61°F)56 mm (2.2 inches)83%high
December Weather14°C (57°F)121 mm (4.8 inches)87%moderate

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