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December Weather in Penn Yan, United States

Last updated: June 24, 2025

In December, the average temperature in Penn Yan, United States hovers around 0°C (33°F), with extremes ranging from a chilly -16°C (3°F) to a mild 17°C (63°F). The region experiences 91 mm (3.6 in) of precipitation spread over 15 days, contributing to a notable average humidity of 86%. Prepare for a wet and cold atmosphere during this time!

December Temperature in Penn Yan

In December in Penn Yan, the average temperature is 0°C (33°F). Maximums can reach 17°C (63°F), while minimums can drop as low as -16°C (3°F). Pack accordingly for a trip to Penn Yan this month, as you'll experience a mix of chilly and mild weather.

December Weather in Penn Yan: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Penn Yan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Penn Yan, December typically has an average temperature of 0°C (33°F), with highs reaching up to 17°C (63°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935465867737265544033
Data source: Temperature data for Penn Yan 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 Penn Yan

In Penn Yan in December, the total precipitation amount is 91 mm (3.6 in) over a span of 15 days.

December Precipitation Trends in Penn Yan

The chart displays monthly precipitation patterns in Penn Yan, 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 Penn Yan, December typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7781741121168914295811428691
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Penn Yan

In Penn Yan in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

December Average Humidity in Penn Yan

This chart illustrates the average monthly humidity levels in Penn Yan, 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 Penn Yan 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 Penn Yan

In Penn Yan 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 Penn Yan, you can visit Hourly UV Index in Penn Yan.

Maximum UV Index Levels in Penn Yan for December

The chart shows the monthly maximum UV Index (UVI) for Penn Yan 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 Penn Yan typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098642
Data source: Penn Yan 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 Penn Yan Compares to Other Months

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

This table compares monthly weather conditions in Penn Yan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)77 mm (3.0 inches)90%moderate
February Weather-2°C (29°F)81 mm (3.2 inches)90%moderate
March Weather2°C (35°F)74 mm (2.9 inches)87%high
April Weather8°C (46°F)112 mm (4.4 inches)88%very high
May Weather14°C (58°F)116 mm (4.5 inches)82%very high
June Weather20°C (68°F)89 mm (3.5 inches)79%very high
July Weather23°C (73°F)142 mm (5.6 inches)78%very high
August Weather22°C (72°F)95 mm (3.8 inches)76%very high
September Weather18°C (65°F)81 mm (3.2 inches)78%very high
October Weather12°C (55°F)142 mm (5.6 inches)84%high
November Weather5°C (41°F)86 mm (3.4 inches)89%moderate
December Weather0°C (33°F)91 mm (3.6 inches)86%low

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