nomadseason

December Weather in Hartwick, United States

Last updated: June 24, 2025

In December, the average temperature in Hartwick, United States hovers around -2°C (29°F). Visitors can expect a chilly range, with minimums plunging to -23°C (-8°F) and highs reaching up to 16°C (61°F). During this time, precipitation is fairly common, amounting to 100 mm (4.0 in) over approximately 15 days, and the average humidity lingers at a high 86%. Be prepared for a brisk yet captivating experience!

December Temperature in Hartwick

In December in Hartwick, the average temperature is -2°C (29°F), with maximums reaching 16°C (61°F) and minimums dropping as low as -23°C (-8°F). This range in temperatures means travelers should prepare for both chilly conditions and occasional warmer days, making layers a wise choice for outdoor activities.

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

The chart illustrates December temperature patterns in Hartwick, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartwick, December typically has an average temperature of -2°C (29°F), with highs reaching up to 16°C (61°F) and lows dropping to around -23°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec232632445665706861513629
Data source: Temperature data for Hartwick generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Hartwick

In Hartwick in December, the total precipitation amount is 100 mm (4.0 in) over the course of 15 days.

December Precipitation Trends in Hartwick

The chart displays monthly precipitation patterns in Hartwick, 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 Hartwick, December typically receives around 100 mm (4.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec849989121125118146127102163105101
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hartwick

In Hartwick in December humidity is 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

December Average Humidity in Hartwick

This chart illustrates the average monthly humidity levels in Hartwick, 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 Hartwick 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 Hartwick

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

Maximum UV Index Levels in Hartwick for December

The chart shows the monthly maximum UV Index (UVI) for Hartwick 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 Hartwick typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998642
Data source: Hartwick 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 Hartwick Compares to Other Months

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

This table compares monthly weather conditions in Hartwick, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)84 mm (3.3 inches)90%moderate
February Weather-3°C (27°F)99 mm (3.9 inches)90%moderate
March Weather0°C (33°F)89 mm (3.5 inches)87%high
April Weather7°C (44°F)121 mm (4.8 inches)88%very high
May Weather14°C (57°F)125 mm (4.9 inches)82%very high
June Weather18°C (65°F)118 mm (4.7 inches)79%very high
July Weather21°C (70°F)146 mm (5.7 inches)78%very high
August Weather20°C (68°F)127 mm (5.0 inches)76%very high
September Weather16°C (62°F)102 mm (4.0 inches)78%very high
October Weather11°C (51°F)163 mm (6.4 inches)84%high
November Weather2°C (37°F)105 mm (4.1 inches)89%moderate
December Weather-2°C (29°F)100 mm (4.0 inches)86%low

Compare Hartwick's Climate with Cities Worldwide