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December Weather in Grayson, United States

Last updated: June 24, 2025

In Grayson, United States, the average temperature in December hovers around 12°C (53°F), with variations ranging from a chilly -3°C (27°F) to a warm 28°C (83°F). Expect approximately 124 mm (4.9 in) of precipitation spread over 10 days, and a notably high average humidity of 88%. Whether you're bracing for the cold or anticipating the warmth, this month offers a unique blend of weather experiences!

December Temperature in Grayson

In December in Grayson, the average temperature is 12°C (53°F), with maximums reaching 28°C (83°F) and minimums dipping as low as -3°C (27°F). It's advisable to pack layers to accommodate the wide temperature range during your travels.

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

The chart illustrates December temperature patterns in Grayson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grayson, December typically has an average temperature of 12°C (53°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec495362667580828279695653
Data source: Temperature data for Grayson 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 Grayson

In Grayson in December, the precipitation amount is 124 mm (4.9 in) spread over a duration of 10 days.

December Precipitation Trends in Grayson

The chart displays monthly precipitation patterns in Grayson, 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 Grayson, December typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec1131691141401441311131209612080124
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grayson

In Grayson in December humidity is 88%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that clings to your skin, making it crucial to dress in layers and stay prepared for the discomfort while exploring.

December Average Humidity in Grayson

This chart illustrates the average monthly humidity levels in Grayson, 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 Grayson 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 Grayson

In Grayson 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 Grayson for better planning.

Maximum UV Index Levels in Grayson for December

The chart shows the monthly maximum UV Index (UVI) for Grayson 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 Grayson typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111112121110864
Data source: Grayson 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 Grayson Compares to Other Months

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

This table compares monthly weather conditions in Grayson, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (49°F)112 mm (4.4 inches)83%moderate
February Weather12°C (54°F)169 mm (6.6 inches)83%high
March Weather17°C (62°F)114 mm (4.5 inches)80%very high
April Weather19°C (66°F)140 mm (5.5 inches)81%extreme
May Weather24°C (75°F)144 mm (5.7 inches)81%extreme
June Weather27°C (80°F)131 mm (5.1 inches)78%extreme
July Weather28°C (83°F)113 mm (4.4 inches)79%extreme
August Weather28°C (83°F)120 mm (4.7 inches)79%extreme
September Weather26°C (80°F)96 mm (3.8 inches)79%very high
October Weather21°C (70°F)120 mm (4.7 inches)77%very high
November Weather13°C (56°F)80 mm (3.2 inches)85%high
December Weather12°C (53°F)124 mm (4.9 inches)88%moderate

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