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December Weather in Saint James, United States

Last updated: June 24, 2025

In December, the average temperature in Saint James, United States is a comfortable 12°C (54°F). However, be prepared for a range, as temperatures can dip as low as -1°C (30°F) and soar up to 23°C (73°F). This month also brings about 132 mm (5.2 in) of precipitation over 10 days, accompanied by a relatively high average humidity of 84%.

December Temperature in Saint James

In December in Saint James, the average temperature is 12°C (54°F), with maximums reaching up to 23°C (73°F) and minimums dropping as low as -1°C (30°F). This diverse temperature range makes it essential to pack for both warm days and cooler evenings during your travels.

December Weather in Saint James: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint James, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint James, December typically has an average temperature of 12°C (54°F), with highs reaching up to 23°C (73°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec505457647277818077715954
Data source: Temperature data for Saint James 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 Saint James

In Saint James in December, the total precipitation amount is 132 mm (5.2 in) over a span of 10 days.

December Precipitation Trends in Saint James

The chart displays monthly precipitation patterns in Saint James, 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 Saint James, December typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec70108759510713816420421267104132
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint James

In Saint James in December, humidity is 84%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky.

December Average Humidity in Saint James

This chart illustrates the average monthly humidity levels in Saint James, 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 Saint James is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%79%78%78%78%82%81%81%78%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint James

In Saint James 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 Saint James for better planning.

Maximum UV Index Levels in Saint James for December

The chart shows the monthly maximum UV Index (UVI) for Saint James 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 Saint James typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Saint James 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 Saint James Compares to Other Months

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

This table compares monthly weather conditions in Saint James, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)70 mm (2.8 inches)83%moderate
February Weather12°C (54°F)108 mm (4.3 inches)79%high
March Weather14°C (57°F)75 mm (2.9 inches)79%very high
April Weather18°C (64°F)95 mm (3.7 inches)78%very high
May Weather22°C (72°F)107 mm (4.2 inches)78%extreme
June Weather25°C (78°F)138 mm (5.4 inches)78%extreme
July Weather27°C (81°F)163 mm (6.4 inches)82%extreme
August Weather27°C (80°F)204 mm (8.0 inches)81%extreme
September Weather25°C (78°F)212 mm (8.4 inches)81%very high
October Weather22°C (71°F)67 mm (2.6 inches)78%very high
November Weather15°C (59°F)104 mm (4.1 inches)82%high
December Weather12°C (54°F)132 mm (5.2 inches)84%moderate

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