nomadseason

December Weather in Hornell, United States

Last updated: June 24, 2025

In December, the average temperature in Hornell, United States hovers around -1°C (30°F). While it can dip as low as -23°C (-9°F), you might also experience a pleasant high of 15°C (60°F). Expect about 85 mm (3.3 in) of precipitation spread over 14 days, contributing to an overall average humidity of 87%.

December Temperature in Hornell

In December in Hornell, the average temperature is -1°C (30°F), with a maximum that can reach 15°C (60°F) and a minimum that can drop as low as -23°C (-9°F). Be prepared for a wide range of temperatures when traveling to Hornell during this month.

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

The chart illustrates December temperature patterns in Hornell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hornell, December typically has an average temperature of -1°C (30°F), with highs reaching up to 15°C (60°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec242734445765706862513730
Data source: Temperature data for Hornell 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 Hornell

In Hornell in December, the precipitation amount is 85 mm (3.3 in) over the course of 14 days.

December Precipitation Trends in Hornell

The chart displays monthly precipitation patterns in Hornell, 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 Hornell, December typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7487771091179512882801278185
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hornell

In Hornell in December, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.

December Average Humidity in Hornell

This chart illustrates the average monthly humidity levels in Hornell, 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 Hornell is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hornell

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

Maximum UV Index Levels in Hornell for December

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

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

This table compares monthly weather conditions in Hornell, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)74 mm (2.9 inches)91%moderate
February Weather-3°C (27°F)87 mm (3.4 inches)91%moderate
March Weather1°C (34°F)77 mm (3.0 inches)88%high
April Weather7°C (45°F)109 mm (4.3 inches)88%very high
May Weather14°C (57°F)117 mm (4.6 inches)82%very high
June Weather18°C (65°F)95 mm (3.7 inches)79%very high
July Weather21°C (70°F)128 mm (5.0 inches)77%very high
August Weather20°C (68°F)81 mm (3.2 inches)72%very high
September Weather16°C (62°F)80 mm (3.2 inches)76%very high
October Weather11°C (52°F)127 mm (5.0 inches)83%high
November Weather3°C (37°F)81 mm (3.2 inches)88%moderate
December Weather-1°C (30°F)85 mm (3.3 inches)87%low

Compare Hornell's Climate with Cities Worldwide