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December Weather in Monticello, United States

Last updated: June 24, 2025

In December, the average temperature in Monticello, United States hovers around 7°C (44°F), with a minimum drop to -11°C (12°F) and a pleasant maximum of 22°C (72°F). Expect 136 mm (5.4 in) of precipitation spread over about 11 days, contributing to an average humidity level of 88%.🌧️ Stay prepared for the cool, damp weather of this enchanting locale!

December Temperature in Monticello

In December in Monticello, the average temperature is 7°C (44°F), with maximums reaching 22°C (72°F) and minimums dropping as low as -11°C (12°F). Be prepared for varying conditions, ranging from mild days to chilly nights, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Monticello, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monticello, December typically has an average temperature of 7°C (44°F), with highs reaching up to 22°C (72°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec394450576874787672624844
Data source: Temperature data for Monticello 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 Monticello

In Monticello in December, the total precipitation amount reaches 136 mm (5.4 in) over the course of 11 days.

December Precipitation Trends in Monticello

The chart displays monthly precipitation patterns in Monticello, 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 Monticello, December typically receives around 136 mm (5.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec9718014714612814010512911412774136
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Monticello

In Monticello in December, humidity is 88%. With an average temperature of 7°C (44°F), this humidity feels like an unwelcoming chill that clings to your skin, making outdoor exploration uncomfortable and prompting frequent breaks in sheltered areas.

December Average Humidity in Monticello

This chart illustrates the average monthly humidity levels in Monticello, 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 Monticello is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Monticello

In Monticello 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 Monticello, you can check the information here.

Maximum UV Index Levels in Monticello for December

The chart shows the monthly maximum UV Index (UVI) for Monticello 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 Monticello typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710111111109753
Data source: Monticello 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 Monticello Compares to Other Months

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

This table compares monthly weather conditions in Monticello, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)97 mm (3.8 inches)88%moderate
February Weather7°C (44°F)180 mm (7.1 inches)88%high
March Weather10°C (51°F)147 mm (5.8 inches)87%high
April Weather14°C (58°F)145 mm (5.7 inches)84%very high
May Weather20°C (68°F)128 mm (5.0 inches)84%extreme
June Weather23°C (74°F)140 mm (5.5 inches)83%extreme
July Weather26°C (78°F)104 mm (4.1 inches)79%extreme
August Weather24°C (76°F)129 mm (5.1 inches)66%very high
September Weather22°C (72°F)114 mm (4.5 inches)67%very high
October Weather17°C (62°F)127 mm (5.0 inches)76%high
November Weather9°C (48°F)74 mm (2.9 inches)89%moderate
December Weather7°C (44°F)136 mm (5.4 inches)88%moderate

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