December Weather in Prospect, United States

Last updated: June 24, 2025

In December, the average temperature in Prospect, United States hovers around -2°C (29°F). Expect colder nights, with minimums plunging to -22°C (-7°F), while daytime highs may reach a mild 15°C (59°F). Be prepared for wet weather, as precipitation averages 133 mm (5.2 in) over 11 days, accompanied by an average humidity of 84%.

December Temperature in Prospect

In December in Prospect, the average temperature is -2°C (29°F), with maximums reaching up to 15°C (59°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide temperature range and pack accordingly for both cold and milder conditions.

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

The chart illustrates December temperature patterns in Prospect, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Prospect, December typically has an average temperature of -2°C (29°F), with highs reaching up to 15°C (59°F) and lows dropping to around -22°C (-7°F).

Data source: Temperature data for Prospect generated using information from the Copernicus Climate Change Service.

December Precipitation in Prospect

In Prospect in December, the precipitation amount is 133 mm (5.2 in) spread over a period of 11 days.

December Precipitation Trends in Prospect

The chart displays monthly precipitation patterns in Prospect, 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 Prospect, December typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Prospect

In Prospect in December, humidity is 84%. With an average temperature of -2°C (29°F), this humidity feels like an icy blanket that clings to your skin, making it difficult to stay warm and comfortable while traveling.

December Average Humidity in Prospect

This chart illustrates the average monthly humidity levels in Prospect, 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 Prospect is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Prospect

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

Maximum UV Index Levels in Prospect for December

The chart shows the monthly maximum UV Index (UVI) for Prospect 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 Prospect typically reaches 2, which falls under the low exposure category.

Data source: Prospect 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 Prospect Compares to Other Months

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

This table compares monthly weather conditions in Prospect, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	93 mm (3.7 inches)	88%	low
February Weather	-3°C (26°F)	88 mm (3.5 inches)	88%	moderate
March Weather	0°C (32°F)	71 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	130 mm (5.1 inches)	81%	high
May Weather	11°C (52°F)	89 mm (3.5 inches)	76%	very high
June Weather	16°C (62°F)	75 mm (3.0 inches)	74%	very high
July Weather	19°C (67°F)	86 mm (3.4 inches)	74%	very high
August Weather	20°C (68°F)	71 mm (2.8 inches)	74%	very high
September Weather	16°C (61°F)	83 mm (3.3 inches)	77%	high
October Weather	11°C (52°F)	121 mm (4.8 inches)	82%	moderate
November Weather	4°C (39°F)	122 mm (4.8 inches)	85%	moderate
December Weather	-2°C (29°F)	133 mm (5.2 inches)	84%	low