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December Weather in Duncan, United States

Last updated: June 24, 2025

In Duncan, United States, the average temperature in December hovers around 8°C (46°F). However, temperatures can dip as low as -12°C (12°F) or rise to a comfortable 23°C (73°F). Expect 25 mm (1.0 in) of precipitation over 4 days, contributing to an average humidity level of 84%. Prepare for a mix of chilly days and refreshing rain!

December Temperature in Duncan

In December in Duncan, the average temperature is 8°C (46°F). The maximum can reach 23°C (73°F), while the minimum can drop to as low as -12°C (12°F). This weather offers a unique opportunity for travelers to experience both mild and chilly conditions, so be sure to pack accordingly!

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

The chart illustrates December temperature patterns in Duncan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Duncan, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (73°F) and lows dropping to around -12°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec444857667484838377665646
Data source: Temperature data for Duncan 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 Duncan

In Duncan in December, the precipitation amount is 25 mm (1.0 in) over the course of 4 days.

December Precipitation Trends in Duncan

The chart displays monthly precipitation patterns in Duncan, 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 Duncan, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec263418336502329152625
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Duncan

In Duncan in December humidity is 84%. With an average temperature of 8°C (46°F), this humidity feels like a chilly mist wrapping around you, making outdoor exploration cumbersome and layering your clothing a necessity for comfort.

December Average Humidity in Duncan

This chart illustrates the average monthly humidity levels in Duncan, 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 Duncan is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%82%68%55%45%37%43%53%66%72%81%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Duncan

In Duncan 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 Duncan for better planning.

Maximum UV Index Levels in Duncan for December

The chart shows the monthly maximum UV Index (UVI) for Duncan 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 Duncan typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213121211864
Data source: Duncan 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 Duncan Compares to Other Months

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

This table compares monthly weather conditions in Duncan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)26 mm (1.0 inches)81%moderate
February Weather9°C (48°F)34 mm (1.3 inches)82%high
March Weather14°C (57°F)18 mm (0.7 inches)68%very high
April Weather19°C (67°F)3 mm (0.1 inches)55%extreme
May Weather23°C (74°F)3 mm (0.1 inches)45%extreme
June Weather29°C (84°F)6 mm (0.2 inches)37%extreme
July Weather29°C (84°F)50 mm (2.0 inches)43%extreme
August Weather28°C (83°F)23 mm (0.9 inches)53%extreme
September Weather25°C (77°F)29 mm (1.1 inches)66%extreme
October Weather19°C (66°F)15 mm (0.6 inches)72%very high
November Weather13°C (56°F)25 mm (1.0 inches)81%high
December Weather8°C (46°F)25 mm (1.0 inches)84%moderate

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