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December Weather in Morrisville, United States

Last updated: June 24, 2025

In Morrisville, United States, the average temperature in December hovers around -1°C (30°F). While the thermometer can drop to a chilly -20°C (-5°F), it has been known to peak at a mild 17°C (63°F). With an average humidity of 86% and precipitation amounting to 108 mm (4.3 in) over 17 days, be prepared for a mix of cold and damp conditions!

December Temperature in Morrisville

In December in Morrisville, the average temperature is -1°C (30°F). The maximum can reach 17°C (63°F) and the minimum can be as low as -20°C (-5°F). This climate makes Morrisville an intriguing destination for travelers seeking a winter wonderland experience.

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

The chart illustrates December temperature patterns in Morrisville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Morrisville, December typically has an average temperature of -1°C (30°F), with highs reaching up to 17°C (63°F) and lows dropping to around -20°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec242733455866727063533830
Data source: Temperature data for Morrisville 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 Morrisville

In Morrisville in December, the total precipitation amount is 108 mm (4.3 in) over the course of 17 days.

December Precipitation Trends in Morrisville

The chart displays monthly precipitation patterns in Morrisville, 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 Morrisville, December typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec961039812413212318513694172115108
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Morrisville

In Morrisville in December, humidity is 86%. With an average temperature of -1°C (30°F), this humidity feels like a heavy blanket wrapping around you, making traveling feel much colder and more uncomfortable than the temperature suggests.

December Average Humidity in Morrisville

This chart illustrates the average monthly humidity levels in Morrisville, 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 Morrisville is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Morrisville

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

Maximum UV Index Levels in Morrisville for December

The chart shows the monthly maximum UV Index (UVI) for Morrisville 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 Morrisville typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
Data source: Morrisville 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 Morrisville Compares to Other Months

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

This table compares monthly weather conditions in Morrisville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)96 mm (3.8 inches)90%moderate
February Weather-3°C (27°F)103 mm (4.1 inches)90%moderate
March Weather1°C (34°F)98 mm (3.8 inches)87%high
April Weather7°C (45°F)124 mm (4.9 inches)88%very high
May Weather14°C (58°F)132 mm (5.2 inches)82%very high
June Weather19°C (67°F)123 mm (4.9 inches)79%very high
July Weather22°C (72°F)185 mm (7.3 inches)78%very high
August Weather21°C (70°F)136 mm (5.4 inches)76%very high
September Weather17°C (63°F)94 mm (3.7 inches)78%very high
October Weather11°C (53°F)172 mm (6.8 inches)84%high
November Weather3°C (38°F)115 mm (4.5 inches)89%moderate
December Weather-1°C (30°F)108 mm (4.3 inches)86%low

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