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December Weather in Saint David, United States

Last updated: June 24, 2025

In December, the average temperature in Saint David, United States hovers around 9°C (48°F). Expect a range from a chilly -6°C (22°F) to a pleasant 23°C (74°F). During this month, precipitation typically totals around 27 mm (1.1 in) spread over 4 days, while the average humidity remains at a high 81%.

December Temperature in Saint David

In December in Saint David, the average temperature is 9°C (48°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop as low as -6°C (22°F). It's essential to pack layers to prepare for the varying temperatures during your travels.

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

The chart illustrates December temperature patterns in Saint David, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint David, December typically has an average temperature of 9°C (48°F), with highs reaching up to 23°C (74°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec464956657282828176665748
Data source: Temperature data for Saint David 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 David

In Saint David in December, the total precipitation amount is 27 mm (1.1 in) over a span of 4 days.

December Precipitation Trends in Saint David

The chart displays monthly precipitation patterns in Saint David, 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 David, December typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec243217438655231132327
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint David

In Saint David in December, humidity is 81%. With an average temperature of 9°C (48°F), this humidity feels like a chilly, damp embrace that can make outdoor activities less enjoyable and may require extra layers to stay comfortable while traveling.

December Average Humidity in Saint David

This chart illustrates the average monthly humidity levels in Saint David, 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 David is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%60%43%32%28%38%60%72%66%74%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint David

In Saint David in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Saint David.

Maximum UV Index Levels in Saint David for December

The chart shows the monthly maximum UV Index (UVI) for Saint David 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 David typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710121213121211965
Data source: Saint David 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 David Compares to Other Months

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

This table compares monthly weather conditions in Saint David, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)24 mm (0.9 inches)74%moderate
February Weather10°C (49°F)32 mm (1.2 inches)71%high
March Weather13°C (57°F)17 mm (0.7 inches)60%very high
April Weather18°C (65°F)3 mm (0.1 inches)43%extreme
May Weather22°C (73°F)3 mm (0.1 inches)32%extreme
June Weather28°C (83°F)8 mm (0.3 inches)28%extreme
July Weather28°C (82°F)65 mm (2.6 inches)38%extreme
August Weather27°C (81°F)52 mm (2.0 inches)60%extreme
September Weather25°C (76°F)31 mm (1.2 inches)72%extreme
October Weather19°C (67°F)13 mm (0.5 inches)66%very high
November Weather14°C (57°F)23 mm (0.9 inches)74%high
December Weather9°C (48°F)27 mm (1.1 inches)81%moderate

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