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December Weather in Youngstown, United States

Last updated: June 24, 2025

In December, the average temperature in Youngstown, United States hovers around 14°C (58°F), with a minimum of -1°C (31°F) and a maximum of 25°C (78°F). Expect 131 mm (5.2 in) of precipitation spread over 9 days, contributing to the notably high average humidity of 86%. Be prepared for a range of weather conditions!

December Temperature in Youngstown

In December in Youngstown, the average temperature is 14°C (58°F). Maximums can reach 25°C (78°F) and minimums can drop as low as -1°C (31°F). This varied climate makes Youngstown an intriguing destination for travelers seeking diverse weather experiences.

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

The chart illustrates December temperature patterns in Youngstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Youngstown, December typically has an average temperature of 14°C (58°F), with highs reaching up to 25°C (78°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec556064687580828179746157
Data source: Temperature data for Youngstown 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 Youngstown

In Youngstown in December, the precipitation amount is 131 mm (5.2 in) over the course of 9 days.

December Precipitation Trends in Youngstown

The chart displays monthly precipitation patterns in Youngstown, 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 Youngstown, December typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec891235611810018017220016410049131
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Youngstown

In Youngstown in December, humidity is 86%. With an average temperature of 14°C (58°F), this humidity feels like traveling in a warm, sticky embrace that can make outdoor adventures a bit heavy and sweat-inducing, so it's wise to stay hydrated and take frequent breaks in the shade.

December Average Humidity in Youngstown

This chart illustrates the average monthly humidity levels in Youngstown, 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 Youngstown is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Youngstown

In Youngstown in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Youngstown for better planning.

Maximum UV Index Levels in Youngstown for December

The chart shows the monthly maximum UV Index (UVI) for Youngstown 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 Youngstown typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111121110864
Data source: Youngstown 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 Youngstown Compares to Other Months

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

This table compares monthly weather conditions in Youngstown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)89 mm (3.5 inches)83%moderate
February Weather16°C (60°F)123 mm (4.8 inches)82%very high
March Weather18°C (64°F)56 mm (2.2 inches)79%very high
April Weather20°C (68°F)118 mm (4.6 inches)77%very high
May Weather24°C (76°F)100 mm (3.9 inches)74%extreme
June Weather27°C (81°F)180 mm (7.1 inches)70%extreme
July Weather28°C (82°F)172 mm (6.8 inches)78%extreme
August Weather27°C (82°F)200 mm (7.9 inches)78%extreme
September Weather26°C (80°F)164 mm (6.5 inches)79%very high
October Weather23°C (74°F)100 mm (3.9 inches)74%very high
November Weather16°C (62°F)48 mm (1.9 inches)83%high
December Weather14°C (58°F)131 mm (5.2 inches)86%moderate

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