nomadseason

December Weather in Dillon, United States

Last updated: June 24, 2025

In Dillon, United States, the average temperature in December hovers around -9°C (17°F). Be prepared for the chill, as temperatures can plummet to a minimum of -27°C (-16°F), while peaking at a maximum of 11°C (52°F). Expect about 25 mm (1.0 in) of precipitation over 8 days, and brace yourself for high humidity, averaging a remarkable 96%.

December Temperature in Dillon

In December in Dillon, the average temperature is -9°C (17°F). Maximum temperatures can reach 11°C (52°F), while the minimum can drop as low as -27°C (-16°F). Be sure to pack warm clothing to stay comfortable while exploring the winter wonderland of Dillon.

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

The chart illustrates December temperature patterns in Dillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dillon, December typically has an average temperature of -9°C (17°F), with highs reaching up to 11°C (52°F) and lows dropping to around -27°C (-16°F).
JanFebMarAprMayJunJulAugSepOctNovDec151626354556656354362717
Data source: Temperature data for Dillon generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Dillon

In Dillon in December, the precipitation amount is 25 mm (1.0 in) occurring over a span of 8 days.

December Precipitation Trends in Dillon

The chart displays monthly precipitation patterns in Dillon, 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 Dillon, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec194431477767232535392425
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Dillon

In Dillon in December humidity is 96%. With an average temperature of -9°C (17°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm.

December Average Humidity in Dillon

This chart illustrates the average monthly humidity levels in Dillon, 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 Dillon is approximately 96%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec94%93%91%87%83%80%75%66%66%77%92%96%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Dillon

In Dillon in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Dillon, you can visit Hourly UV Index in Dillon.

Maximum UV Index Levels in Dillon for December

The chart shows the monthly maximum UV Index (UVI) for Dillon 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 Dillon typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101111108642
Data source: Dillon 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 Dillon Compares to Other Months

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

This table compares monthly weather conditions in Dillon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)19 mm (0.7 inches)94%moderate
February Weather-9°C (16°F)44 mm (1.7 inches)93%moderate
March Weather-3°C (27°F)31 mm (1.2 inches)91%high
April Weather1°C (35°F)47 mm (1.8 inches)87%very high
May Weather7°C (46°F)77 mm (3.0 inches)83%very high
June Weather14°C (57°F)67 mm (2.6 inches)80%extreme
July Weather19°C (66°F)23 mm (0.9 inches)75%extreme
August Weather17°C (64°F)25 mm (1.0 inches)66%very high
September Weather12°C (54°F)35 mm (1.4 inches)66%very high
October Weather2°C (36°F)39 mm (1.5 inches)77%high
November Weather-3°C (27°F)24 mm (1.0 inches)91%moderate
December Weather-9°C (17°F)25 mm (1.0 inches)96%low

Compare Dillon's Climate with Cities Worldwide