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December Weather in Morrisville, United States

Last updated: June 24, 2025

In December, the average temperature in Morrisville, United States hovers around -5°C (23°F), but be prepared for a range that can dip as low as -29°C (-20°F) and reach up to 13°C (56°F). Expect a precipitation amount of 88 mm (3.5 in) spread over 16 days, contributing to a high average humidity of 89%. Make sure to dress warmly and stay dry during your visit!

December Temperature in Morrisville

In December in Morrisville, the average temperature is -5°C (23°F), with maximums reaching 13°C (56°F) and minimums plummeting to as low as -29°C (-20°F). Travelers should be prepared for a wide range of temperatures and ensure they pack warm clothing for their visit.

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 -5°C (23°F), with highs reaching up to 13°C (56°F) and lows dropping to around -29°C (-20°F).
JanFebMarAprMayJunJulAugSepOctNovDec172028415463686659473222
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 precipitation amount is 88 mm (3.5 in) spread over 16 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 88 mm (3.5 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec8784801171031141381017615211288
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 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
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.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
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-8°C (17°F)87 mm (3.4 inches)93%low
February Weather-7°C (20°F)84 mm (3.3 inches)92%moderate
March Weather-2°C (28°F)80 mm (3.2 inches)86%moderate
April Weather5°C (41°F)117 mm (4.6 inches)85%very high
May Weather12°C (54°F)103 mm (4.0 inches)80%very high
June Weather17°C (63°F)114 mm (4.5 inches)74%very high
July Weather20°C (68°F)138 mm (5.4 inches)76%very high
August Weather19°C (66°F)101 mm (4.0 inches)75%very high
September Weather15°C (59°F)76 mm (3.0 inches)78%high
October Weather8°C (47°F)152 mm (6.0 inches)86%moderate
November Weather0°C (32°F)112 mm (4.4 inches)88%moderate
December Weather-5°C (23°F)88 mm (3.5 inches)89%low

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