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December Weather in Oshkosh, United States

Last updated: June 24, 2025

In Oshkosh, United States, the average temperature in December hovers around -2°C (28°F). However, be prepared for significant fluctuations, as the thermometer can dip to a chilling -24°C (-11°F) or rise to a comfortable 15°C (60°F). During this month, expect about 47 mm (1.9 in) of precipitation spread over 7 days, accompanied by an average humidity of 81%.

December Temperature in Oshkosh

In December in Oshkosh, the average temperature is -2°C (28°F), with maximums reaching up to 15°C (60°F) and minimums plummeting as low as -24°C (-11°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both chilly and moderately warm conditions.

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

The chart illustrates December temperature patterns in Oshkosh, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oshkosh, December typically has an average temperature of -2°C (28°F), with highs reaching up to 15°C (60°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec212132425769747164513628
Data source: Temperature data for Oshkosh 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 Oshkosh

In Oshkosh in December, the total precipitation amount is 47 mm (1.9 in) recorded over a span of 7 days.

December Precipitation Trends in Oshkosh

The chart displays monthly precipitation patterns in Oshkosh, 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 Oshkosh, December typically receives around 47 mm (1.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec43466094107101100107751014747
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Oshkosh

In Oshkosh in December, humidity is 81%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Oshkosh

This chart illustrates the average monthly humidity levels in Oshkosh, 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 Oshkosh is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Oshkosh

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

Maximum UV Index Levels in Oshkosh for December

The chart shows the monthly maximum UV Index (UVI) for Oshkosh 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 Oshkosh typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
Data source: Oshkosh 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 Oshkosh Compares to Other Months

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

This table compares monthly weather conditions in Oshkosh, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)43 mm (1.7 inches)85%moderate
February Weather-6°C (21°F)46 mm (1.8 inches)85%moderate
March Weather0°C (32°F)60 mm (2.4 inches)85%moderate
April Weather6°C (43°F)94 mm (3.7 inches)85%very high
May Weather14°C (57°F)107 mm (4.2 inches)78%very high
June Weather20°C (69°F)101 mm (4.0 inches)80%very high
July Weather23°C (74°F)100 mm (3.9 inches)78%very high
August Weather22°C (71°F)107 mm (4.2 inches)76%very high
September Weather18°C (64°F)75 mm (3.0 inches)79%high
October Weather11°C (51°F)101 mm (4.0 inches)83%moderate
November Weather2°C (36°F)47 mm (1.8 inches)88%moderate
December Weather-2°C (28°F)47 mm (1.9 inches)81%low

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