December Weather in Cahokia, United States

Last updated: February 24, 2025

In December, Cahokia experiences a diverse weather spectrum, with maximum temperatures peaking at 23°C (74°F) and a notable average of 4°C (40°F). The minimum can drop to a chilly -16°C (3°F), creating a stark contrast. During this month, precipitation totals 64 mm (2.5 in), spread over approximately 7 days, making it a relatively wet period. Additionally, the humidity level holds high at 86%, resulting in crisp, damp air that characterizes the winter landscape of Cahokia.

December Temperature in Cahokia

In Cahokia, United States, December ushers in the heart of winter, marked by a notable dip in temperatures compared to the transitional months preceding it. With minimums plummeting to -16°C (3°F) and average highs reaching around 23°C (74°F), the month reflects a stark contrast to the milder temperatures of November. As the year draws to a close, the weather is characterized by chilly starts, with the average temperature resting at 4°C (40°F), creating a brisk atmosphere perfect for winter festivities. This decline in warmth echoes a broader trend, as the community braces for the deep freeze of January, which typically presents the most frigid conditions of the year. The sharp seasonal shift from vibrant autumn to frosty winter highlights the dynamic climate of this Midwestern region, inviting residents to embrace cozy gatherings and the serene beauty of a snow-blanketed landscape.

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

The chart illustrates December temperature patterns in Cahokia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec333647556877807773594539
Data source: Temperature data for Cahokia 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 Cahokia

In December, Cahokia experiences a noticeable drop in precipitation, with only 64 mm (2.5 in) of rain spread over 7 days. This decline continues from the wettest months, such as May, which averages 146 mm (5.7 in) across 14 days. The trend shows a gradual decrease in both precipitation amount and frequency as the year comes to a close, hinting at a dryer end to the year. As winter settles in, December’s drier conditions pave the way for a quieter weather pattern, reflecting a significant shift from the earlier months of rain.

December Precipitation Trends in Cahokia

The chart displays monthly precipitation patterns in Cahokia, 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.
JanFebMarAprMayJunJulAugSepOctNovDec79831351351469492131581077564
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cahokia

In December, Cahokia experiences its highest humidity of the year at 86%, marking a noticeable increase from the 85% recorded in November. This end-of-year surge continues the trend of elevated humidity levels that begins in the warmer months, peaking in the summer with 83% in June. As autumn sets in, humidity remains relatively stable, hovering around 76% from September to October, before rising sharply again in November. The gradual increase through the fall culminates in December’s damp chill, making it a month characterized by significant moisture in the air. This seasonal pattern highlights Cahokia’s transition from warm, humid summers to cooler, more humid winters, providing a unique atmospheric experience for its residents.

December Average Humidity in Cahokia

This chart illustrates the average monthly humidity levels in Cahokia, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cahokia

In Cahokia, the UV Index begins to dip in December, settling at a moderate level of 3, which is a notable decrease from the extreme highs experienced during the summer months. This December reading aligns with the trends observed from earlier in the year, where the UV Index peaked at 11 in June. As the temperature cools, residents can feel relieved with a longer burn time of 30 minutes before sun exposure becomes a concern. However, it’s essential to remain vigilant, as even moderate UV levels can still lead to skin damage with prolonged exposure. For more detailed UV information, check out Cahokia UV Index.

Maximum UV Index Levels in Cahokia for December

The chart shows the monthly maximum UV Index (UVI) for Cahokia 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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109753
Data source: Cahokia 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.

December Sunshine in Cahokia

December in Cahokia sees a decline in sunshine hours as the year draws to a close, with 196 hours of sunlight illuminating the winter landscape. This marks a noticeable dip from the peak summer months, where sunshine blazes for up to 349 hours in July. As days shorten, the trend of decreasing daylight starts in late summer, continuing through fall, and hits its lowest point in December before the gradual increase begins anew in January. This pattern reflects the broader seasonal shifts experienced throughout the year, with winter promising a cozy respite from the bright intensity of the summer sun. The transition into the new year hints at the return of longer days, making December a time to savor the warmth of both sunlight and community during the colder months.

Monthly Sunshine Duration in Cahokia: December Highlighted

The December sunshine duration represents the total number of hours Cahokia experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec127h177h207h240h289h328h349h328h291h242h215h196h
Data source: Cahokia December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Cahokia During December

In December, the likelihood of sunny weather in Cahokia, United States, sits at a mild 48%, offering a pleasant balance amid the encroaching winter chill. This figure is reflective of an upward trend as it follows November's promising 53% sun chance, which peaks during the autumnal transition. Although December's chances see a slight decrease compared to the previous month, they are still notably higher than the winter months like January and February, which hover around the 30% mark. Thus, for those looking to soak up some sun before the New Year, December in Cahokia presents a reasonable opportunity for clear skies and sunshine.

Percentage of Sunny Days in December in Cahokia

The chart illustrates the percentage of sunny days in Cahokia throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Cahokia experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec30%29%45%49%27%42%51%47%64%40%53%48%
Data source: Cahokia December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Cahokia in December

As December settles in Cahokia, daylight begins to dwindle, offering just 9 hours of sunlight—similar to January's brief glow. This marks the year's low point for daylight duration, following a gradual decline from the peak of 14 hours experienced during the summer months of June and July. The transition from November's 10 hours to December's shorter days signifies the seasonal shift towards winter, where evenings grow longer and the warmth of the sun is cherished in those fleeting hours. This cyclical pattern of daylight reflects the rhythmic dance of the seasons, inviting residents to savor cozy indoor moments as they await the return of longer days in the coming months.

Average Daylight Hours in Cahokia for December

The chart illustrates the variation in daylight duration in Cahokia throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 48m10h 45m11h 58m13h 13m14h 16m14h 47m14h 30m13h 34m12h 22m11h 8m10h 3m9h 30m
Data source: Cahokia daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Cahokia

As December rolls into Cahokia, the winds pick up slightly, averaging 3.6 m/s (about 8 mph), marking a noticeable increase compared to the calmer summer months. This briskness is a refreshing shift from the gentle breezes of July, which sees average winds as low as 2.0 m/s (5 mph). It's intriguing to observe how wind patterns oscillate throughout the year—peaking subtly in the cooler months while remaining moderate in the spring and autumn. The transition into winter brings this invigorating air to the region, hinting at the season's approach and inviting residents to embrace the chill with open arms.

Average December Wind Speed in Cahokia

The chart displays monthly wind speed patterns in Cahokia, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.73.73.43.12.72.02.33.03.43.33.6 m/s
Data source: Cahokia December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Cahokia Compares to Other Months

The weather in Cahokia changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Cahokia and find detailed weather information for every month.

December and January showcase notable differences in weather patterns. In December, temperatures range from a minimum of -16°C (3°F) to a comfortable maximum of 23°C (74°F), with an average of 4°C (40°F). The month sees about 64 mm (2.5 in) of precipitation over approximately 7 days, and humidity levels are relatively high at 86%. In contrast, January experiences even colder conditions, with temperatures dipping to a minimum of -21°C (-5°F) and averaging around 0°C (33°F), peaking at a maximum of 20°C (68°F). Precipitation increases slightly to 79 mm (3.1 in) over 8 days, accompanied by a decrease in humidity to 82%. For a detailed look at January weather, you can check out Cahokia weather in January.

In December, the weather experiences a wider temperature range with a minimum of -16°C (3°F) and a maximum reaching 23°C (74°F), averaging around 4°C (40°F). Precipitation is moderate, totaling 64 mm (2.5 in) over approximately 7 days, with high humidity at 86%. In contrast, February shows slightly colder conditions with a minimum of -19°C (-2°F) and a maximum of 25°C (77°F), averaging 2°C (36°F). February also sees increased precipitation at 82 mm (3.2 in) over roughly 10 days, but with lower humidity at 80%. For more detailed insights on February weather, you can visit Cahokia weather in February.

December and March offer contrasting weather patterns that reflect the transition from winter to spring. In December, temperatures range from a brisk minimum of -16°C (3°F) to a mild maximum of 23°C (74°F), averaging around 4°C (40°F), accompanied by relatively high humidity of 86%. Precipitation in December totals 64 mm (2.5 in) over about 7 days. In contrast, March sees a slight increase in average temperature, with a minimum also at -16°C (3°F) and a maximum reaching 28°C (82°F), averaging 8°C (48°F). March is wetter, with total precipitation of 134 mm (5.3 in) spread across 12 days and slightly lower humidity at 80%. For a more detailed look at March conditions, you can check Cahokia weather in March.

December and April present striking contrasts in weather conditions. December typically sees an average temperature of around 4°C (40°F), with night-time lows plunging to -16°C (3°F) and occasional highs reaching 23°C (74°F). The month is characterized by high humidity at 86% and relatively low precipitation, totaling 64 mm (2.5 in) over about 7 days. In contrast, April experiences a significant warming trend, with average temperatures rising to 13°C (56°F) and maximums peaking at 31°C (88°F). However, it also brings increased rainfall, amounting to 135 mm (5.3 in) over 11 days, coupled with a slightly lower humidity level of 80%. For a closer look at how April's weather unfolds, visit Cahokia weather in April.

December and May present starkly contrasting weather patterns. In December, temperatures can plummet to a minimum of -16°C (3°F) but average around 4°C (40°F), with a maximum reaching 23°C (74°F). The month sees a fair amount of precipitation, measuring 64 mm (2.5 in) over about 7 days, accompanied by high humidity levels at 86%. In contrast, May experiences much milder conditions with a minimum temperature of 4°C (40°F) and an average of 20°C (68°F), peaking at a sweltering 34°C (94°F). This month also brings increased rainfall, totaling 146 mm (5.7 in) across approximately 14 days and slightly lower humidity at 82%. For a more detailed view of weather conditions in May, you can check out Cahokia weather in May.

December and June present contrasting weather conditions. In December, temperatures can plunge as low as -16°C (3°F), with an average of 4°C (40°F) and a maximum reaching 23°C (74°F). This cold month also sees significant humidity at 86% and about 64 mm (2.5 in) of precipitation over 7 days. In stark contrast, June boasts much warmer temperatures, with a minimum of 12°C (54°F), an average of 25°C (77°F), and highs soaring to 36°C (97°F). Although June experiences increased precipitation of 94 mm (3.7 in) across 11 days, the humidity is slightly lower at 83%. For a more detailed look at June weather, check this link: Cahokia weather in June.

December and July present contrasting weather experiences. In December, temperatures can plummet to a chilling minimum of -16°C (3°F), with an average temperature of 4°C (40°F) and highs reaching up to 23°C (74°F). This month also brings significant humidity at 86% and a total precipitation of 64 mm (2.5 in) over approximately 7 days. In stark contrast, July boasts milder minimum temperatures of 16°C (61°F) and an average of 27°C (80°F), peaking at a scorching 38°C (102°F). Despite being the wetter month with 92 mm (3.6 in) of precipitation over about 10 days, humidity is slightly lower at 81%. For more specifics on July weather, you can visit Cahokia weather in July.

December weather is characterized by colder temperatures, with a minimum of -16°C (3°F) and an average of 4°C (40°F), while August enjoys much warmer conditions, with a minimum of 12°C (55°F) and an average of 25°C (77°F). Precipitation is also more frequent in August, with 131 mm (5.1 in) spread over 12 days, compared to December's 64 mm (2.5 in) over just 7 days. Additionally, December boasts higher humidity levels at 86%, while August's humidity sits at a lower 80%. For a closer look at what to expect in August, check out Cahokia weather in August.

When comparing December and September weather, the differences are quite stark. December experiences a wide range of temperatures, with a minimum of -16°C (3°F) and an average of 4°C (40°F), while September boasts much warmer conditions, featuring temperatures ranging from a minimum of 7°C (46°F) to a maximum of 35°C (95°F). Additionally, December has higher humidity levels at 86%, compared to September's 76%. Precipitation is somewhat similar, with December receiving 64 mm (2.5 in) over 7 days and September slightly less at 58 mm (2.3 in) over the same duration. For more specific insights into September weather, you can visit Cahokia weather in September.

In comparing the weather between December and October, we see a stark contrast in temperatures and precipitation. December experiences colder conditions, with average temperatures around 4°C (40°F) and a minimum plunging to -16°C (3°F), while October enjoys a milder atmosphere with average temperatures reaching 15°C (60°F) and maximums soaring up to 34°C (94°F). Additionally, October is wetter, with 107 mm (4.2 in) of precipitation spread over 11 days compared to December's 64 mm (2.5 in) over just 7 days. Humidity levels are also higher in December at 86%, compared to October's more moderate 76%. For more detailed information on October weather in this area, you can check Cahokia weather in October.

In comparing the weather of December and November, December typically experiences slightly colder temperatures, with a minimum of -16°C (3°F) compared to November's -12°C (10°F). The average temperature in December is 4°C (40°F), whereas November has a bit warmer average of 7°C (45°F). Interestingly, both months see relatively high maximum temperatures, with December reaching up to 23°C (74°F) and November peaking at 25°C (78°F). Precipitation is also notable, as December receives 64 mm (2.5 in) over 7 days, while November has slightly higher precipitation at 75 mm (3.0 in) across 9 days. Both months share similar humidity levels, with December at 86% and November at 85%. For a more detailed look at November's weather patterns, you can visit Cahokia weather in November.

Compare Cahokia's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Cahokia

In December, Cahokia experiences a notable shift in weather patterns, marked by colder temperatures and increased humidity. While the maximum temperature can reach a mild 23°C (74°F), the overall atmosphere is dominated by a significant drop, with average readings settling around 4°C (40°F) and the chilling lows plunging to nearly -16°C (3°F). This month also sees a notable 86% humidity and about 64 mm (2.5 in) of precipitation spread across 7 days, painting a stark contrast to the generally warmer and drier months preceding it. The combination of these elements creates a unique winter climate that shapes the character of Cahokia during December. For a more detailed perspective, check out Cahokia Climate.