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December Weather in McMinnville, United States

Last updated: June 24, 2025

In McMinnville, United States, the average temperature in December hovers around 8°C (46°F), with fluctuations from a chilly -9°C (16°F) to a warm 23°C (74°F). Expect 140 mm (5.5 in) of precipitation spread over approximately 11 days, paired with a high average humidity of 88%. Be prepared for a varied yet often damp atmosphere!

December Temperature in McMinnville

In December in McMinnville, the average temperature is 8°C (46°F), with maximums reaching 23°C (74°F) and minimums dropping as low as -9°C (16°F). This variation makes it essential for travelers to pack layers and be prepared for both mild and chilly weather.

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 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -9°C (16°F).
JanFebMarAprMayJunJulAugSepOctNovDec414653596975797773634946
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 140 mm (5.5 in), occurring over a span of 11 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 140 mm (5.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec10517616414211711110810210711773140
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 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
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 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 McMinnville, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
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)105 mm (4.1 inches)87%moderate
February Weather8°C (47°F)176 mm (6.9 inches)87%high
March Weather12°C (53°F)164 mm (6.5 inches)85%very high
April Weather15°C (59°F)142 mm (5.6 inches)82%very high
May Weather21°C (70°F)117 mm (4.6 inches)83%extreme
June Weather24°C (76°F)111 mm (4.4 inches)82%extreme
July Weather26°C (79°F)108 mm (4.3 inches)78%extreme
August Weather25°C (78°F)102 mm (4.0 inches)67%very high
September Weather23°C (73°F)107 mm (4.2 inches)64%very high
October Weather17°C (64°F)117 mm (4.6 inches)74%high
November Weather9°C (49°F)73 mm (2.9 inches)87%moderate
December Weather8°C (46°F)140 mm (5.5 inches)88%moderate

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