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December Weather in Prospect, United States

Last updated: June 24, 2025

In December, the average temperature in Prospect, United States hovers around 2°C (35°F), with temperatures ranging from a chilling -18°C (-1°F) to a pleasant 18°C (65°F). Expect about 83 mm (3.3 in) of precipitation spread over 11 days, accompanied by a notable average humidity of 86%.

December Temperature in Prospect

In December in Prospect, the average temperature is 2°C (35°F), with maximums reaching 18°C (65°F) and minimums dropping as low as -18°C (-1°F). Overall, travelers should be prepared for a wide range of temperatures and dress accordingly.

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 (35°F), with highs reaching up to 18°C (65°F) and lows dropping to around -18°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec303241516371757368574135
Data source: Temperature data for Prospect 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 Prospect

In Prospect in December, the precipitation amount is 83 mm (3.3 in) over the course 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 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7297971121251351128178979283
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Prospect

In Prospect in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
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 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 Prospect, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
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.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)72 mm (2.8 inches)88%moderate
February Weather0°C (33°F)97 mm (3.8 inches)87%moderate
March Weather5°C (41°F)97 mm (3.8 inches)87%high
April Weather10°C (51°F)112 mm (4.4 inches)87%very high
May Weather17°C (63°F)125 mm (4.9 inches)81%very high
June Weather22°C (72°F)135 mm (5.3 inches)82%very high
July Weather24°C (75°F)112 mm (4.4 inches)81%very high
August Weather23°C (73°F)81 mm (3.2 inches)78%very high
September Weather20°C (68°F)78 mm (3.1 inches)78%very high
October Weather14°C (57°F)96 mm (3.8 inches)82%high
November Weather5°C (42°F)92 mm (3.6 inches)89%moderate
December Weather2°C (35°F)83 mm (3.3 inches)86%moderate

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