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December Weather in Youngsville, United States

Last updated: June 24, 2025

In December, the average temperature in Youngsville, United States is a cool 8°C (47°F), with the thermometer sometimes dipping as low as -8°C (17°F) or peaking at a pleasant 23°C (74°F). Expect a moderate precipitation amount of 103 mm (4.0 in) over about 9 days, accompanied by a high average humidity of 86%.

December Temperature in Youngsville

In December in Youngsville, the average temperature is 8°C (47°F), with maximums reaching 23°C (74°F) and minimums dipping as low as -8°C (17°F). This varied climate makes it essential for travelers to pack layers to comfortably enjoy both the warmer days and cooler nights.

December Weather in Youngsville: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Youngsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Youngsville, December typically has an average temperature of 8°C (47°F), with highs reaching up to 23°C (74°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec434852627076807874655146
Data source: Temperature data for Youngsville 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 Youngsville

In Youngsville in December, the precipitation amount is 103 mm (4.0 in) over the course of 9 days.

December Precipitation Trends in Youngsville

The chart displays monthly precipitation patterns in Youngsville, 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 Youngsville, December typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec91111821131201371221541299181103
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Youngsville

In Youngsville in December, humidity is 86%. With an average temperature of 8°C (47°F), this humidity feels like a chilling damp that penetrates your clothes, making outdoor adventures less enjoyable and encouraging you to seek warmth indoors rather than explore the sights.

December Average Humidity in Youngsville

This chart illustrates the average monthly humidity levels in Youngsville, 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 Youngsville is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%81%80%81%81%81%80%79%80%86%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Youngsville

In Youngsville 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 Youngsville, you can check the information here.

Maximum UV Index Levels in Youngsville for December

The chart shows the monthly maximum UV Index (UVI) for Youngsville 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 Youngsville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
Data source: Youngsville 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 Youngsville Compares to Other Months

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

This table compares monthly weather conditions in Youngsville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)91 mm (3.6 inches)85%moderate
February Weather9°C (48°F)111 mm (4.4 inches)82%high
March Weather11°C (52°F)82 mm (3.2 inches)81%very high
April Weather16°C (62°F)113 mm (4.4 inches)80%very high
May Weather21°C (70°F)120 mm (4.7 inches)81%very high
June Weather24°C (76°F)137 mm (5.4 inches)81%extreme
July Weather27°C (80°F)122 mm (4.8 inches)81%extreme
August Weather26°C (79°F)154 mm (6.1 inches)80%very high
September Weather23°C (74°F)128 mm (5.1 inches)79%very high
October Weather18°C (65°F)91 mm (3.6 inches)80%very high
November Weather11°C (51°F)81 mm (3.2 inches)85%moderate
December Weather8°C (47°F)103 mm (4.0 inches)86%moderate

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