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December Weather in McNary, United States

Last updated: June 24, 2025

In December, the average temperature in McNary, United States hovers around 1°C (34°F). Be prepared for chilly conditions, as temperatures can dip to a minimum of -18°C (-1°F) and rise to a maximum of 16°C (61°F). Expect 44 mm (1.7 in) of precipitation spread across 7 days, contributing to a noticeable average humidity of 84%.

December Temperature in McNary

In December in McNary, the average temperature is 1°C (34°F). Maximum temperatures can reach 16°C (61°F), while minimums can plummet to as low as -18°C (-1°F). Travelers should be prepared for a wide range of temperatures when visiting.

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

The chart illustrates December temperature patterns in McNary, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McNary, December typically has an average temperature of 1°C (34°F), with highs reaching up to 16°C (61°F) and lows dropping to around -18°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec323440495667676661524334
Data source: Temperature data for McNary 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 McNary

In McNary in December, the precipitation amount is 44 mm (1.7 in) spread over a duration of 7 days.

December Precipitation Trends in McNary

The chart displays monthly precipitation patterns in McNary, 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 McNary, December typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5062492123101666744302344
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in McNary

In McNary in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

December Average Humidity in McNary

This chart illustrates the average monthly humidity levels in McNary, 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 McNary 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 McNary

In McNary in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in McNary.

Maximum UV Index Levels in McNary for December

The chart shows the monthly maximum UV Index (UVI) for McNary 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 McNary typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5811121313131211865
Data source: McNary 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 McNary Compares to Other Months

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

This table compares monthly weather conditions in McNary, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)50 mm (2.0 inches)81%moderate
February Weather1°C (34°F)62 mm (2.4 inches)82%very high
March Weather4°C (40°F)49 mm (1.9 inches)68%extreme
April Weather9°C (49°F)21 mm (0.8 inches)55%extreme
May Weather13°C (56°F)23 mm (0.9 inches)45%extreme
June Weather20°C (68°F)10 mm (0.4 inches)37%extreme
July Weather20°C (68°F)166 mm (6.5 inches)43%extreme
August Weather19°C (66°F)67 mm (2.6 inches)53%extreme
September Weather16°C (62°F)44 mm (1.7 inches)66%extreme
October Weather11°C (52°F)30 mm (1.2 inches)72%very high
November Weather6°C (43°F)23 mm (0.9 inches)81%high
December Weather1°C (34°F)44 mm (1.7 inches)84%moderate

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