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December Weather in Stewartstown, United States

Last updated: June 24, 2025

In December, the average temperature in Stewartstown, United States hovers around 3°C (39°F). Expect a chill in the air, with minimums dipping as low as -12°C (11°F) and maximums reaching a mild 18°C (65°F). Rain is likely, with 95 mm (3.8 in) of precipitation over 9 days, and the air will feel quite humid, with an average humidity of 84%.

December Temperature in Stewartstown

In December in Stewartstown, the average temperature is 3°C (39°F). The maximum can reach 18°C (65°F) while the minimum can drop to as low as -12°C (11°F). Travelers should be prepared for chilly weather and possible temperature fluctuations during this time.

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

The chart illustrates December temperature patterns in Stewartstown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stewartstown, December typically has an average temperature of 3°C (39°F), with highs reaching up to 18°C (65°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec343843546473787569604538
Data source: Temperature data for Stewartstown 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 Stewartstown

In Stewartstown in December, the total precipitation amount is 95 mm (3.8 in) over the course of 9 days.

December Precipitation Trends in Stewartstown

The chart displays monthly precipitation patterns in Stewartstown, 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 Stewartstown, December typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec6197991011401161531501201039195
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Stewartstown

In Stewartstown in December humidity is 84%. With an average temperature of 3°C (39°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and the air heavy, where every step feels like wading through a thick fog.

December Average Humidity in Stewartstown

This chart illustrates the average monthly humidity levels in Stewartstown, 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 Stewartstown is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Stewartstown

In Stewartstown in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Stewartstown, you can check the information here.

Maximum UV Index Levels in Stewartstown for December

The chart shows the monthly maximum UV Index (UVI) for Stewartstown 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 Stewartstown typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098743
Data source: Stewartstown 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 Stewartstown Compares to Other Months

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

This table compares monthly weather conditions in Stewartstown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)60 mm (2.4 inches)84%moderate
February Weather3°C (38°F)97 mm (3.8 inches)83%moderate
March Weather6°C (44°F)99 mm (3.9 inches)83%high
April Weather12°C (54°F)101 mm (4.0 inches)81%very high
May Weather18°C (64°F)140 mm (5.5 inches)78%very high
June Weather23°C (73°F)116 mm (4.6 inches)79%very high
July Weather26°C (78°F)153 mm (6.0 inches)74%very high
August Weather24°C (75°F)150 mm (5.9 inches)72%very high
September Weather21°C (70°F)120 mm (4.7 inches)75%very high
October Weather15°C (60°F)103 mm (4.1 inches)81%high
November Weather7°C (45°F)91 mm (3.6 inches)85%moderate
December Weather3°C (39°F)95 mm (3.8 inches)84%moderate

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