December Weather in Grant Park, United States

Last updated: February 24, 2025

December in Grant Park, United States, reveals a fascinating climate narrative characterized by a maximum temperature of 18°C (65°F), dipping to a chilly average of 1°C (34°F) and an occasional drop to a minimum of -20°C (-5°F). This month sees significant precipitation, totaling 59 mm (2.3 in), over the course of just 7 days, contributing to the park's lush winter landscape. With an overall humidity level of 84%, visitors can expect a brisk and crisp atmosphere, perfect for embracing the beauty of winter in this serene locale.

December Temperature in Grant Park

In December, Grant Park experiences a notable transition into winter, with temperatures reflecting a chilly demeanor. The month opens with a minimum of -20°C (-5°F), while the average hovers around 1°C (34°F), and the maximum peaks at 18°C (65°F). This gradual descent from the previous months showcases a discernible pattern of cooling, as it is sandwiched between milder November and the harsher chill of January. December's temperatures signal not just a drop, but a stark shift from the warmer late fall days, encapsulating the essence of winter's grasp on the region as days grow shorter and nights become more biting.

December Weather in Grant Park: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Grant Park, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec272940506273767368554034
Data source: Temperature data for Grant Park 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 Grant Park

In Grant Park, United States, December wraps up the year with a modest precipitation total of 59 mm (2.3 in), marking it as one of the drier months alongside November. This decrease in rainfall is reflected in the 7 rainy days, suggesting a trend towards fewer, yet possibly heavier, precipitation events as winter settles in. Compared to the earlier months, like May's peak of 161 mm, December's totals emphasize a significant decline. Overall, the weather transitions into a quieter phase, hinting at the colder, clearer days of winter ahead while still offering occasional showers that keep the landscape vibrant.

December Precipitation Trends in Grant Park

The chart displays monthly precipitation patterns in Grant Park, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6971951201611249892771356459
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grant Park

In Grant Park, December brings a notable shift in humidity levels, measuring at 84%—a slight decrease from the 88% experienced in November. Throughout the year, humidity tends to fluctuate, peaking in the spring months of March and April with 84% and 85% respectively, before descending into the summer. The overall trend suggests winter months are generally more humid, with December maintaining a relatively high level compared to the 75% to 80% range seen in the mid-year months. This seasonal rhythm illustrates the park's characteristic moisture, particularly as winter approaches, making December a time of rich atmospheric depth in the area.

December Average Humidity in Grant Park

This chart illustrates the average monthly humidity levels in Grant Park, 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%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 Grant Park

In December, Grant Park experiences a significant drop in its UV Index, with a reading of 2, classifying it as low exposure. This reduction in UV radiation allows for a more forgiving burn time of 45 minutes, making it an ideal month for outdoor activities without the urgency of sun protection. Contrasting sharply with the peak months of May to July, when the UV Index soared to 10, December's lower levels indicate a seasonal trend where protection against UV exposure becomes less critical. As the year wraps up, individuals can enjoy the outdoors with a decreased risk of sunburn. For more detailed information, visit Grant Park UV Index.

Maximum UV Index Levels in Grant Park for December

The chart shows the monthly maximum UV Index (UVI) for Grant Park 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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Grant Park 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 Grant Park

In Grant Park, December marks a gentle decline in sunshine hours as the year draws to a close, with 179 hours gracing the skies. While this is a decrease from the vibrant peaks of summer—where July shines brightest at 353 hours—December still offers a decent amount of daylight compared to the chillier months of January, which only captures 116 hours. The trend highlights a steady transition from the long, sun-drenched days of summer, with each month offering a gradual reduction in brightness. Notably, December stands in contrast to the bustling June, which boasts the highest sun exposure at 329 hours, reminding us that even as winter approaches, Grant Park maintains a balmy holiday charm under its softer winter sun.

Monthly Sunshine Duration in Grant Park: December Highlighted

The December sunshine duration represents the total number of hours Grant Park 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.
JanFebMarAprMayJunJulAugSepOctNovDec116h172h226h244h284h329h353h334h287h223h189h179h
Data source: Grant Park December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grant Park During December

As December arrives in Grant Park, the likelihood of sunny weather stands at 38%, reflecting a slight dip from the previous month's 46%. This trend indicates that while December has a moderate chance of sunshine, it’s generally less promising than the more favorable months of September, which boasts a robust 59%, or November's higher likelihood. Interestingly, December sits comfortably between the cooler winter months of January and February, which are marked by significantly lower chances of sun at 25% and 31%, respectively. The gradual decline in sunny days towards the year's end suggests that while December may not offer the brightest skies, there are still opportunities for pleasant, sunny moments amidst the winter chill.

Percentage of Sunny Days in December in Grant Park

The chart illustrates the percentage of sunny days in Grant Park 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 Grant Park experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%31%45%40%33%42%43%45%59%33%46%38%
Data source: Grant Park December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grant Park in December

As December arrives in Grant Park, the cycle of daylight hours completes another year, mirroring the retreat of the sun during winter. With only 9 hours of daylight, the month reflects the shorter days characteristic of this season, aligning closely with November's duration. The gradual increase in light begins with January's 9-hour mark, but as spring approaches in March, daylight steadily climbs to 11 hours and peaks at 15 hours in the vibrant days of June. Following the peak, daylight hours begin their slow descent, a trend marked by soft transitions through autumn. The rhythm of day and night encapsulates the essence of seasonal change, reminding us of nature's unwavering cycle.

Average Daylight Hours in Grant Park for December

The chart illustrates the variation in daylight duration in Grant Park throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 34m10h 37m11h 58m13h 20m14h 30m15h 5m14h 46m13h 44m12h 24m11h 2m9h 50m9h 14m
Data source: Grant Park daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Grant Park

As December settles in Grant Park, a noticeable shift in wind dynamics accompanies the onset of winter. With an average wind speed climbing to 4.3 m/s (10 mph), this month stands out with a briskness that echoes the festive spirit. While the summer months experienced a gradual decrease in wind speed, peaking in March, December brings a revival of stronger breezes, reminiscent of the refreshing gusts felt earlier in the year. This uptick in wind is a stark contrast to the calmest summer days, enhancing the park's atmosphere as it prepares for the chill of winter. With the wind whispering through the trees and rustling the fallen leaves, December in Grant Park invites visitors to embrace the invigorating energy of the season.

Average December Wind Speed in Grant Park

The chart displays monthly wind speed patterns in Grant Park, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.44.64.03.63.43.02.73.83.64.24.3 m/s
Data source: Grant Park December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Grant Park Compares to Other Months

The weather in Grant Park 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 Grant Park and find detailed weather information for every month.

December and January present a notable shift in weather patterns. December experiences milder temperatures, with an average of 1°C (34°F) and a maximum of 18°C (65°F), while January sees a more severe chill, with an average of -3°C (27°F) and a minimum reaching -30°C (-22°F). Precipitation increases slightly from December's 59 mm (2.3 in) to January's 69 mm (2.7 in), although both months have comparable humidity levels, with December at 84% and January at 82%. For more detailed insights on how January weather unfolds in this region, you can check Grant Park weather in January.

In December, temperatures are milder, ranging from a minimum of -20°C (-5°F) to a maximum of 18°C (65°F), with an average of 1°C (34°F). The month experiences about 59 mm (2.3 in) of precipitation over approximately 7 days and maintains a humidity level of 84%. In contrast, February sees more extreme cold, with temperatures dipping to a minimum of -31°C (-24°F) and peaking at 21°C (70°F), resulting in an average temperature of -2°C (29°F). Precipitation increases slightly to 71 mm (2.8 in) over about 10 days, while the humidity remains relatively stable at 83%. For a detailed look at the weather in Grant Park during February, you can visit Grant Park weather in February.

In December, temperatures range from a frigid minimum of -20°C (-5°F) to a milder maximum of 18°C (65°F), with an average temperature around 1°C (34°F). The month sees approximately 59 mm (2.3 in) of precipitation over about 7 days, accompanied by 84% humidity.

In contrast, March offers a more temperate climate, with minimum temperatures slightly higher at -18°C (-1°F) and maximums reaching 26°C (80°F), contributing to a warmer average of 5°C (41°F). However, precipitation increases to 95 mm (3.7 in) over around 12 days, while humidity remains consistent at 84%. For more insights on March's weather, you can check Grant Park weather in March.

December and April present noteworthy contrasts in weather conditions. December experiences colder temperatures, with a minimum of -20°C (-5°F) and an average of 1°C (34°F), while April sees a significant rise, boasting a minimum of -7°C (19°F) and an average of 10°C (50°F). While precipitation in December totals 59 mm (2.3 in) over 7 days, April has a higher rainfall, accumulating 120 mm (4.7 in) across 13 days. Additionally, both months share similar humidity levels, with December at 84% and April slightly higher at 85%. To explore more about the weather conditions in April, visit Grant Park weather in April.

Comparing the weather between December and May reveals significant differences in temperature and precipitation. In December, temperatures can drop as low as -20°C (-5°F), with an average of 1°C (34°F) and a maximum of 18°C (65°F). The month sees 59 mm (2.3 in) of precipitation over approximately 7 days, coupled with high humidity at 84%. In contrast, May showcases much milder temperatures, with a minimum of -2°C (29°F), an average of 17°C (62°F), and a maximum reaching up to 34°C (94°F). This month is also wetter, accumulating 161 mm (6.3 in) of precipitation across around 15 days, while maintaining a slightly lower humidity of 79%. For more specific insights, check out the detailed weather patterns at Grant Park weather in May.

December and June present striking contrasts in weather patterns. In December, temperatures can plummet to a minimum of -20°C (-5°F), with an average of around 1°C (34°F) and a maximum reaching 18°C (65°F). The month experiences about 59 mm (2.3 in) of precipitation over 7 days, accompanied by high humidity levels at 84%. In contrast, June offers a much warmer climate, with minimum temperatures of 10°C (51°F) and an average of 23°C (73°F), peaking at 35°C (95°F). The precipitation increases to 124 mm (4.9 in) over 13 days, while humidity remains slightly lower at 82%. For more detailed information on June weather, check out Grant Park weather in June.

In December, temperatures in Grant Park can be quite chilly, with a minimum reaching -20°C (-5°F) and an average of around 1°C (34°F), while July boasts much warmer conditions, featuring minimums of 13°C (56°F) and averages of 24°C (76°F). December experiences lower humidity levels at 84%, compared to July's 80%, but the latter sees more days of precipitation, totaling 12 days with an average of 98 mm (3.9 in), as opposed to December's 7 days and 59 mm (2.3 in). Overall, July presents a stark contrast to the winter chill of December, making it a much more inviting time for outdoor activities. For more detailed information about the weather in July, check out Grant Park weather in July.

In December, temperatures can drop as low as -20°C (-5°F), with an average temperature of around 1°C (34°F) and occasional highs reaching up to 18°C (65°F). The month experiences approximately 59 mm (2.3 in) of precipitation over about 7 days, coupled with a high humidity level of 84%. In contrast, August brings much warmer weather, with minimum temperatures of 11°C (52°F) and averages reaching up to 23°C (74°F). Highs can soar to 35°C (95°F), and the precipitation increases to about 92 mm (3.6 in) over approximately 11 days, with slightly lower humidity at 81%. For more detailed insights, you can check Grant Park weather in August.

December and September present strikingly different weather conditions. In December, temperatures can plunge to a chilling minimum of -20°C (-5°F), while the average hovers around 1°C (34°F) and peaks at a mild 18°C (65°F). In contrast, September enjoys a more temperate climate with a minimum of 5°C (41°F) and an average of 20°C (69°F), reaching a sweltering maximum of 34°C (94°F). Precipitation levels are fairly similar, with December receiving 59 mm (2.3 in) over 7 days and September slightly higher at 77 mm (3.0 in) over 8 days. Humidity levels are comparable as well, with December at 84% and September at 80%. For a closer look at the specifics, check out Grant Park weather in September.

When comparing the weather in December and October, there is a noticeable contrast in temperatures and precipitation patterns. In December, the temperatures can drop quite low, with a minimum of -20°C (-5°F) and an average around 1°C (34°F), while October experiences much milder weather, with a minimum of -3°C (28°F) and an average of 13°C (56°F). Additionally, October sees more precipitation, totaling 135 mm (5.3 in) over 13 days, compared to December's 59 mm (2.3 in) over just 7 days. Humidity levels are quite similar, with December at 84% and October slightly lower at 82%. For a detailed look at October weather patterns, refer to Grant Park weather in October.

In December, temperatures can drop significantly, with a minimum of -20°C (-5°F) and an average of 1°C (34°F), compared to November's milder minimum of -13°C (9°F) and an average of 4°C (40°F). While December has a maximum temperature of 18°C (65°F), which is lower than November's peak of 25°C (78°F), it experiences slightly less precipitation at 59 mm (2.3 in) over 7 days, compared to November's 64 mm (2.5 in) over 8 days. Humidity remains fairly high in both months, with December at 84% and November at 88%. For more insights on weather conditions, you can check out Grant Park weather in November.

Compare Grant Park's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Grant Park

As December rolls into Grant Park, the weather showcases a dramatic shift from the milder months. With temperatures fluctuating between brisk lows and occasional highs, the biting cold settles in, creating a stark contrast to the more temperate autumn air. Additionally, the increase in precipitation, marked by about seven rainy days, adds an extra layer of chill and dampness, making the air feel even colder due to the elevated humidity levels. This atmospheric change signals the onset of winter, wrapping Grant Park in a unique blend of beauty and briskness. For a deeper understanding of how December's climate unfolds, be sure to explore Grant Park Climate.