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December Weather in Zachary, United States

Last updated: June 24, 2025

In Zachary, United States, the average temperature in December hovers around 13°C (55°F). Expect a range from a chilly -3°C (27°F) to a warm 28°C (82°F). During this month, you can anticipate 126 mm (4.9 in) of precipitation spread over 12 days, leading to a high average humidity of 88%.

December Temperature in Zachary

In December in Zachary, the average temperature is 13°C (55°F), with maximums reaching 28°C (82°F) and minimums dropping as low as -3°C (27°F). Be prepared for a wide range of temperatures, ensuring you're equipped for both warm days and chilly evenings while traveling.

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

The chart illustrates December temperature patterns in Zachary, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Zachary, December typically has an average temperature of 13°C (55°F), with highs reaching up to 28°C (82°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec525763677580818179715855
Data source: Temperature data for Zachary 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 Zachary

In Zachary in December, the precipitation amount is 126 mm (4.9 in) spread over a span of 12 days.

December Precipitation Trends in Zachary

The chart displays monthly precipitation patterns in Zachary, 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 Zachary, December typically receives around 126 mm (4.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1191209516816216717913912711085126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Zachary

In Zachary in December humidity is 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience for traveling.

December Average Humidity in Zachary

This chart illustrates the average monthly humidity levels in Zachary, 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 Zachary is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Zachary

In Zachary 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 Zachary for better planning.

Maximum UV Index Levels in Zachary for December

The chart shows the monthly maximum UV Index (UVI) for Zachary 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 Zachary typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110864
Data source: Zachary 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 Zachary Compares to Other Months

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

This table compares monthly weather conditions in Zachary, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)119 mm (4.7 inches)83%moderate
February Weather14°C (57°F)120 mm (4.7 inches)83%very high
March Weather17°C (64°F)95 mm (3.7 inches)80%very high
April Weather19°C (67°F)168 mm (6.6 inches)81%extreme
May Weather24°C (75°F)162 mm (6.4 inches)81%extreme
June Weather26°C (80°F)167 mm (6.6 inches)78%extreme
July Weather27°C (82°F)179 mm (7.0 inches)79%extreme
August Weather27°C (81°F)139 mm (5.5 inches)79%extreme
September Weather26°C (79°F)127 mm (5.0 inches)79%very high
October Weather22°C (71°F)110 mm (4.3 inches)77%very high
November Weather15°C (59°F)85 mm (3.3 inches)85%high
December Weather13°C (55°F)126 mm (4.9 inches)88%moderate

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