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December Weather in Cynthiana, United States

Last updated: June 24, 2025

In December, the average temperature in Cynthiana, United States hovers around 4°C (40°F). Expect a chill, with minimum lows plummeting to -13°C (8°F), while maximums can reach a pleasant 21°C (69°F). Prepare for some wet days, too, as approximately 125 mm (4.9 in) of precipitation falls over 10 days, and with an average humidity of 87%, be ready for that cozy atmosphere!

December Temperature in Cynthiana

In December in Cynthiana, the average temperature is 4°C (40°F). Maximums can reach 21°C (69°F), while minimums can drop as low as -13°C (8°F). Be sure to pack layers to accommodate the wide temperature range during your travels.

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

The chart illustrates December temperature patterns in Cynthiana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cynthiana, December typically has an average temperature of 4°C (40°F), with highs reaching up to 21°C (69°F) and lows dropping to around -13°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec353946556673777570594540
Data source: Temperature data for Cynthiana 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 Cynthiana

In Cynthiana in December, the precipitation amount is 125 mm (4.9 in) spread over a period of 10 days.

December Precipitation Trends in Cynthiana

The chart displays monthly precipitation patterns in Cynthiana, 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 Cynthiana, December typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec911311271391311851159812210788125
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cynthiana

In Cynthiana in December humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

December Average Humidity in Cynthiana

This chart illustrates the average monthly humidity levels in Cynthiana, 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 Cynthiana is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cynthiana

In Cynthiana 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 Cynthiana, you can check the information here.

Maximum UV Index Levels in Cynthiana for December

The chart shows the monthly maximum UV Index (UVI) for Cynthiana 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 Cynthiana typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108653
Data source: Cynthiana 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 Cynthiana Compares to Other Months

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

This table compares monthly weather conditions in Cynthiana, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)90 mm (3.6 inches)88%moderate
February Weather4°C (39°F)131 mm (5.2 inches)88%moderate
March Weather8°C (47°F)127 mm (5.0 inches)87%high
April Weather13°C (55°F)139 mm (5.5 inches)85%very high
May Weather19°C (66°F)131 mm (5.2 inches)81%very high
June Weather23°C (73°F)185 mm (7.3 inches)82%very high
July Weather25°C (77°F)115 mm (4.5 inches)81%very high
August Weather24°C (75°F)98 mm (3.8 inches)73%very high
September Weather21°C (71°F)122 mm (4.8 inches)73%very high
October Weather15°C (60°F)107 mm (4.2 inches)78%high
November Weather7°C (45°F)88 mm (3.5 inches)89%moderate
December Weather4°C (40°F)125 mm (4.9 inches)87%moderate

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