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December Weather in McMinnville, United States

Last updated: June 24, 2025

In December, the average temperature in McMinnville, United States hovers around 5°C (40°F), with a low of -6°C (21°F) and a high of 15°C (59°F). Expect considerable moisture, as precipitation totals approximately 209 mm (8.2 in) over 19 days. The air remains quite damp, with an average humidity level of 87%.

December Temperature in McMinnville

In December in McMinnville, the average temperature is 5°C (40°F). The maximum can reach 15°C (59°F), and the minimum can be as low as -6°C (21°F). Be sure to pack warm clothing and be prepared for chilly weather while exploring the area.

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

The chart illustrates December temperature patterns in McMinnville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McMinnville, December typically has an average temperature of 5°C (40°F), with highs reaching up to 15°C (59°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec414044495662676863524540
Data source: Temperature data for McMinnville 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 McMinnville

In McMinnville in December, the total precipitation amount is 209 mm (8.2 in) spread over 19 days.

December Precipitation Trends in McMinnville

The chart displays monthly precipitation patterns in McMinnville, 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 McMinnville, December typically receives around 209 mm (8.2 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec19117514412358465668104163209
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in McMinnville

In McMinnville in December, humidity is 87%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that wraps around you, making outdoor excursions less enjoyable and requiring extra layers to stay comfortable while exploring.

December Average Humidity in McMinnville

This chart illustrates the average monthly humidity levels in McMinnville, 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 McMinnville is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in McMinnville

In McMinnville 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 McMinnville, you can visit Hourly UV Index in McMinnville.

Maximum UV Index Levels in McMinnville for December

The chart shows the monthly maximum UV Index (UVI) for McMinnville 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 McMinnville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec23579101097532
Data source: McMinnville 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 McMinnville Compares to Other Months

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

This table compares monthly weather conditions in McMinnville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)191 mm (7.5 inches)85%low
February Weather4°C (40°F)175 mm (6.9 inches)84%moderate
March Weather7°C (45°F)144 mm (5.7 inches)85%moderate
April Weather10°C (50°F)123 mm (4.8 inches)83%high
May Weather13°C (56°F)58 mm (2.3 inches)83%very high
June Weather17°C (62°F)46 mm (1.8 inches)83%very high
July Weather19°C (67°F)5 mm (0.2 inches)82%very high
August Weather20°C (69°F)6 mm (0.3 inches)74%very high
September Weather17°C (63°F)67 mm (2.7 inches)71%high
October Weather11°C (52°F)104 mm (4.1 inches)81%moderate
November Weather7°C (46°F)163 mm (6.4 inches)87%moderate
December Weather5°C (40°F)209 mm (8.2 inches)87%low

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