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December Weather in South Pekin, United States

Last updated: June 24, 2025

In December, the average temperature in South Pekin, United States hovers around 2°C (35°F). Expect a minimum chill of -20°C (-5°F) and a maximum warmth reaching 20°C (69°F). During this month, 54 mm (2.1 in) of precipitation typically falls over 7 days, accompanied by an average humidity of 84%. Stay prepared for a mix of wintery conditions!

December Temperature in South Pekin

In December in South Pekin, the average temperature is 2°C (35°F). The maximum can reach 20°C (69°F) and the minimum can be as low as -20°C (-5°F). This wide range of temperatures suggests that travelers should be prepared for both mild and cold conditions during their stay.

December Weather in South Pekin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in South Pekin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Pekin, December typically has an average temperature of 2°C (35°F), with highs reaching up to 20°C (69°F) and lows dropping to around -20°C (-5°F).
JanFebMarAprMayJunJulAugSepOctNovDec273042526474777470564135
Data source: Temperature data for South Pekin 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 South Pekin

In South Pekin in December, the precipitation amount is 54 mm (2.1 in) over a duration of 7 days.

December Precipitation Trends in South Pekin

The chart displays monthly precipitation patterns in South Pekin, 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 South Pekin, December typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec646911811716515011289681226054
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in South Pekin

In South Pekin in December, humidity is 84%. With an average temperature of 2°C (35°F), this humidity feels like an uncomfortable chill that penetrates your bones, making outdoor travel quite brisk and uninviting.

December Average Humidity in South Pekin

This chart illustrates the average monthly humidity levels in South Pekin, 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 South Pekin is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in South Pekin

In South Pekin 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 South Pekin, you can visit Hourly UV Index in South Pekin.

Maximum UV Index Levels in South Pekin for December

The chart shows the monthly maximum UV Index (UVI) for South Pekin 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 South Pekin typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111098642
Data source: South Pekin 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 South Pekin Compares to Other Months

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

This table compares monthly weather conditions in South Pekin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)64 mm (2.5 inches)82%moderate
February Weather-1°C (30°F)69 mm (2.7 inches)83%moderate
March Weather6°C (43°F)118 mm (4.6 inches)84%high
April Weather11°C (52°F)117 mm (4.6 inches)85%very high
May Weather18°C (65°F)165 mm (6.5 inches)79%very high
June Weather23°C (75°F)150 mm (5.9 inches)82%extreme
July Weather25°C (77°F)112 mm (4.4 inches)80%very high
August Weather24°C (75°F)89 mm (3.5 inches)81%very high
September Weather21°C (70°F)68 mm (2.7 inches)80%very high
October Weather13°C (57°F)122 mm (4.8 inches)82%high
November Weather5°C (41°F)60 mm (2.4 inches)88%moderate
December Weather2°C (35°F)54 mm (2.1 inches)84%low

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