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December Weather in Washington Grove, United States

Last updated: June 24, 2025

In Washington Grove, United States, the average temperature in December is a cool 4°C (40°F). Be prepared for a range of temperatures, with a minimum of -11°C (12°F) and a maximum of 19°C (67°F). During this time, expect approximately 95 mm (3.7 in) of precipitation spread over 9 days, contributing to an average humidity of 84%.

December Temperature in Washington Grove

In December in Washington Grove, the average temperature is 4°C (40°F). The maximum can reach 19°C (67°F) and the minimum can be as low as -11°C (12°F). Be prepared for a wide temperature range if you're planning to travel during this time.

December Weather in Washington Grove: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Washington Grove, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Washington Grove, December typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (67°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec363945556574797671614639
Data source: Temperature data for Washington Grove 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 Washington Grove

In Washington Grove in December, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.

December Precipitation Trends in Washington Grove

The chart displays monthly precipitation patterns in Washington Grove, 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 Washington Grove, December typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec609689971381301541341051048895
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Washington Grove

In Washington Grove in December, humidity is 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

December Average Humidity in Washington Grove

This chart illustrates the average monthly humidity levels in Washington Grove, 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 Washington Grove is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Washington Grove

In Washington Grove 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 Washington Grove, you can check the information here.

Maximum UV Index Levels in Washington Grove for December

The chart shows the monthly maximum UV Index (UVI) for Washington Grove 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 Washington Grove typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Washington Grove 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 Washington Grove Compares to Other Months

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

This table compares monthly weather conditions in Washington Grove, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)59 mm (2.3 inches)84%moderate
February Weather4°C (40°F)96 mm (3.8 inches)83%moderate
March Weather7°C (45°F)89 mm (3.5 inches)83%high
April Weather13°C (56°F)96 mm (3.8 inches)81%very high
May Weather18°C (65°F)138 mm (5.4 inches)78%very high
June Weather23°C (74°F)129 mm (5.1 inches)79%very high
July Weather26°C (80°F)154 mm (6.1 inches)74%very high
August Weather25°C (77°F)134 mm (5.3 inches)72%very high
September Weather21°C (71°F)105 mm (4.2 inches)75%very high
October Weather16°C (61°F)104 mm (4.1 inches)81%high
November Weather8°C (46°F)88 mm (3.5 inches)85%moderate
December Weather4°C (40°F)95 mm (3.7 inches)84%moderate

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