December Weather in Stone Mountain, United States

Last updated: February 24, 2025

In December, Stone Mountain, United States, experiences a notable transition into winter. With maximum temperatures reaching 24°C (75°F) and an average of 9°C (48°F), the month presents a mix of mild days and brisk evenings. However, temperatures can plunge to a chilly minimum of -6°C (21°F), reminding residents of the season’s chill. The area sees 137 mm (5.4 in) of precipitation, spread over approximately 11 days, contributing to the lushness of the landscape. Coupled with a high humidity level at 89%, December offers a unique blend of cool, wet weather that sets the stage for a picturesque winter environment in this vibrant region.

December Temperature in Stone Mountain

In December, Stone Mountain experiences a transition into the colder months, showcasing a notable drop in temperatures. The minimum temperature hovers around -6°C (21°F), while the average temperature sits at a brisk 9°C (48°F). Daytime highs can still be rather pleasant, reaching up to 24°C (75°F), reflecting the region's variability even during winter. This trend illustrates a significant cooling from the mild autumn temperatures, yet offers a balance with manageable highs, making December an interesting month for both tourists and locals. As the year closes, the chilly nights juxtaposed with warmer daytime peaks create a unique winter atmosphere in this picturesque setting.

December Weather in Stone Mountain: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Stone Mountain, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec455156627176797875665248
Data source: Temperature data for Stone Mountain 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 Stone Mountain

In Stone Mountain, United States, December emerges as a notable month in terms of precipitation, receiving an average of 137 mm (5.4 in) over approximately 11 days. This places December among the wetter months, following the summer's peak rainfall in June and August. Interestingly, while precipitation in early winter surpasses November's lower total of 80 mm (3.1 in), it is slightly less than the amounts seen in the spring months, such as March and February. The distribution of rainfall is relatively consistent as well, with December standing out as a transitional month, bridging the dry spells of late fall and the wetter conditions often experienced in early spring. Overall, December reflects a shift in the weather pattern, hinting at the approach of winter's chill accompanied by moisture that sustains the region’s vibrant ecosystem.

December Precipitation Trends in Stone Mountain

The chart displays monthly precipitation patterns in Stone Mountain, 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.
JanFebMarAprMayJunJulAugSepOctNovDec10514712912110112711314511312380137
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Stone Mountain

In Stone Mountain, December brings a notable increase in humidity, reaching a peak of 89%—the highest for the year. This rise is part of a broader trend, as humidity tends to fluctuate seasonally; it starts strong at 86% in January and dips to its lowest in October at 78%. Despite the occasional drop, the latter months see a spike, with November mirroring January's levels before December's surge. This pattern indicates a winter season characterized by moist air, which can create a cozy atmosphere but may also lead to a chill that residents feel more acutely. As the year wraps up, the increased humidity can enhance the landscape's beauty, making Stone Mountain's renowned scenery even more breathtaking.

December Average Humidity in Stone Mountain

This chart illustrates the average monthly humidity levels in Stone Mountain, 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.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%81%81%81%83%81%82%78%86%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Stone Mountain

In Stone Mountain, United States, the UV Index experiences a noticeable decline as winter approaches. Starting at a robust 11 in the summer months of April through July, which falls into the extreme exposure category with a quick 10-minute burn time, the index gradually dips to 4 by December. This moderate rating indicates a much safer environment for outdoor activities, with a burn time extending to 30 minutes. The transition from the sweltering peaks of summer contrasts sharply with the cooler, milder winter sun, making December an ideal time to enjoy the beauty of the outdoors without the intense risk of sunburn. For further details about the UV Index throughout the year, check out Stone Mountain UV Index.

Maximum UV Index Levels in Stone Mountain for December

The chart shows the monthly maximum UV Index (UVI) for Stone Mountain 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.
JanFebMarAprMayJunJulAugSepOctNovDec47811111111109864
Data source: Stone Mountain 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 Stone Mountain

December in Stone Mountain, United States, brings a gentle decline in sunshine hours, averaging 193 hours. While this marks a tapering off from the sun-soaked months of summer, it still holds a respectable glow compared to the early winter months. Notably, the highest sunshine occurs in July, with an impressive 339 hours, gradually decreasing through the fall and into December. This pattern reflects the natural shift in seasons, where shorter days yield to cooler temperatures, making each sunny moment in December a cherished reminder of the warmer months. As winter approaches, Stone Mountain bestows its visitors with a softer light, encouraging cozy gatherings and festive celebrations beneath the waning sun.

Monthly Sunshine Duration in Stone Mountain: December Highlighted

The December sunshine duration represents the total number of hours Stone Mountain 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.
JanFebMarAprMayJunJulAugSepOctNovDec169h173h242h282h314h309h339h318h297h270h241h193h
Data source: Stone Mountain December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Stone Mountain During December

In Stone Mountain, December brings a 38% chance of sunny weather, positioning it among the more cloud-covered months of the year. While this percentage signifies a lower likelihood of sun compared to the sunnier November (66%), it reflects a consistent trend of reduced sunlight as winter approaches. Interestingly, the skies in December are not as overcast as in the peak summer months like July, which hits a low of 31% sun. Overall, while December may not be the sunniest month, the remnants of fall sunshine linger, offering a glimmer of brightness as the year comes to a close.

Percentage of Sunny Days in December in Stone Mountain

The chart illustrates the percentage of sunny days in Stone Mountain 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 Stone Mountain experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec41%39%34%54%39%36%31%39%45%43%66%38%
Data source: Stone Mountain December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Stone Mountain in December

As December unfolds in Stone Mountain, daylight takes a noticeable dip, with just 9 hours of sunlight gracing the days. This marks a decline from the previous months, creating a stark contrast to the peak summer days of June and July, where the sun shone for a generous 14 hours. Following the vibrant 13 hours of light in May and August, the transition into fall brings shorter days, ultimately settling into the brisk winter season. This gradual seasonal shift showcases a natural ebb and flow of light, offering residents a cozy opportunity to embrace the comforting glow of the holiday season as daylight wanes.

Average Daylight Hours in Stone Mountain for December

The chart illustrates the variation in daylight duration in Stone Mountain throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 11m10h 58m11h 59m13h 2m13h 55m14h 20m14h 6m13h 20m12h 20m11h 17m10h 23m9h 56m
Data source: Stone Mountain daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Stone Mountain

In Stone Mountain, United States, the December winds carry a subtle chill, with an average speed of 3.2 m/s (7 mph). This marks a slight increase from November's 3.1 m/s, continuing a trend where wind speeds tend to peak during the late fall and early winter months. Notably, the winds are markedly gentler during the summer, dipping to a low of 2.0 m/s (4 mph) in July. As the year progresses, the return to higher wind speeds in December suggests a seasonal shift, invigorating the landscape with brisk, fresh air just in time for the holiday season. Overall, while the wind varies throughout the year, the consistent return to stronger breezes in the cooler months reminds residents of nature's ever-changing rhythms.

Average December Wind Speed in Stone Mountain

The chart displays monthly wind speed patterns in Stone Mountain, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.73.53.23.12.62.02.12.32.73.13.2 m/s
Data source: Stone Mountain December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Stone Mountain Compares to Other Months

The weather in Stone Mountain 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 Stone Mountain and find detailed weather information for every month.

December and January showcase notable differences in weather conditions. December experiences a wider temperature range, with minimums around -6°C (21°F) and maximums reaching up to 24°C (75°F), while January tends to be colder, with minimum temperatures dropping to -10°C (14°F) and maximums slightly higher at 25°C (77°F). Precipitation in December is greater, totaling 137 mm (5.4 in) over 11 days compared to January’s 105 mm (4.1 in) over 9 days. Additionally, December maintains a higher humidity level at 89%, contrasted with January's 86%. For those interested in more detailed insights, refer to Stone Mountain weather in January.

December and February exhibit similar cold temperatures, with December experiencing a minimum of -6°C (21°F) and February slightly warmer with a minimum of -5°C (23°F). In terms of average temperatures, December averages 9°C (48°F), while February is a bit milder at 11°C (51°F). Both months see notable precipitation, with December recording 137 mm (5.4 in) over 11 days and February slightly higher at 147 mm (5.8 in) over 13 days. Humidity levels are also fairly close, with December at 89% and February at 84%. For a more detailed look at the weather specifics in February, you can check Stone Mountain weather in February.

When comparing the weather in December and March, we see notable differences. December experiences a wider temperature range, with minimums reaching down to -6°C (21°F) and maximums peaking at 24°C (75°F), while March's temperatures are slightly milder, varying from -5°C (23°F) to a maximum of 29°C (85°F). Precipitation levels are relatively close, with December receiving 137 mm (5.4 in) over 11 days and March slightly less at 129 mm (5.1 in) over 13 days. Additionally, December has higher humidity at 89%, compared to March's 83%. For a more detailed look at conditions during this period, you can explore Stone Mountain weather in March.

When comparing December and April weather, there are notable differences in temperature and humidity. December tends to be much colder, with temperatures ranging from a minimum of -6°C (21°F) to a maximum of 24°C (75°F) and an average of 9°C (48°F). The month also experiences high humidity at 89%, along with significant precipitation totaling 137 mm (5.4 in) over 11 days. In contrast, April brings milder temperatures, with a minimum of 0°C (33°F) and a maximum of 29°C (84°F), averaging 17°C (62°F). The humidity decreases to 81%, and precipitation is slightly lower at 121 mm (4.8 in) over 8 days. For more details on what to expect during this vibrant spring month, check out Stone Mountain weather in April.

December and May present distinct contrasts in weather. In December, temperatures can drop as low as -6°C (21°F) with an average of 9°C (48°F) and a maximum reaching 24°C (75°F). The month witnesses significant precipitation, totaling 137 mm (5.4 in) over approximately 11 days, accompanied by high humidity levels at 89%. In comparison, May boasts a milder climate with minimum temperatures of 5°C (41°F), an inviting average of 22°C (71°F), and maximums soaring up to 34°C (94°F). Although May also experiences rainfall—100 mm (4.0 in) over the same number of days—its humidity is lower at 81%. For a closer look at May's weather patterns, visit Stone Mountain weather in May.

December and June present strikingly different weather conditions. In December, temperatures range from a chilly minimum of -6°C (21°F) to a max of 24°C (75°F), with an average of 9°C (48°F). The month sees 137 mm (5.4 in) of precipitation over 11 days, accompanied by high humidity at 89%. In contrast, June boasts much warmer temperatures, with a minimum of 13°C (56°F) and a maximum of 33°C (92°F), averaging 24°C (76°F). Although June has slightly less precipitation at 127 mm (5.0 in), it experiences rain on more days, totaling 16. Humidity is more comfortable at 81%. For those interested in exploring June weather, you can find more detailed information here: Stone Mountain weather in June.

December and July present contrasting weather conditions. December experiences cooler temperatures, with a minimum of -6°C (21°F) and an average of 9°C (48°F), while July boasts significantly warmer temperatures, ranging from a minimum of 16°C (61°F) to an average of 26°C (80°F). Precipitation is notable in both months, with December receiving 137 mm (5.4 in) over 11 days compared to July's 113 mm (4.4 in) across 18 days. Additionally, December's humidity peaks at 89%, while July's is slightly lower at 83%. For a closer look at July's climate specifics, visit Stone Mountain weather in July.

December and August present contrasting weather patterns. In December, temperatures can drop as low as -6°C (21°F), with an average temperature of 9°C (48°F) and a maximum of 24°C (75°F). The month also experiences significant precipitation, with 137 mm (5.4 in) falling over 11 days and high humidity levels at 89%. In contrast, August boasts much warmer temperatures, with a minimum of 16°C (62°F), an average of 26°C (79°F), and a maximum reaching 35°C (96°F). Precipitation is slightly higher in August at 145 mm (5.7 in) over 15 days, but the humidity is lower at 81%. For a more detailed look at August weather, check out Stone Mountain weather in August.

December and September present contrasting weather experiences. In December, temperatures can drop as low as -6°C (21°F), with a mild average of 9°C (48°F) and a maximum of 24°C (75°F). The month is characterized by higher humidity at 89% and significant precipitation, totaling 137 mm (5.4 in) over 11 days. In contrast, September boasts a warmer climate, with temperatures ranging from a minimum of 10°C (50°F) to a sweltering maximum of 36°C (97°F) and an average of 24°C (75°F). The month is slightly drier, with 113 mm (4.4 in) of rainfall over just 9 days and humidity at 82%. For more details on the conditions during this month, you can visit Stone Mountain weather in September.

In comparing the weather patterns of December and October, we notice significant differences. December experiences cooler temperatures with a minimum of -6°C (21°F) and an average of 9°C (48°F), while October boasts a higher average temperature of 19°C (66°F) and can reach a maximum of 36°C (98°F). Precipitation levels are slightly higher in December, totaling 137 mm (5.4 in) over 11 days, compared to October's 123 mm (4.9 in) across 8 days. The humidity also rises in December to 89%, contrasting with October's more moderate 78%. For a detailed look at Stone Mountain's October conditions, you can visit Stone Mountain weather in October.

December brings cooler temperatures compared to November, with a minimum of -6°C (21°F) and an average of 9°C (48°F), while November has a minimum of -5°C (23°F) and an average of 11°C (52°F). The maximum temperatures also drop slightly from November’s 26°C (79°F) to December’s 24°C (75°F). Precipitation increases significantly in December to 137 mm (5.4 in) over 11 days, compared to November's 80 mm (3.1 in) over 8 days, making December a wetter month with higher humidity at 89%. For a detailed look at the weather in November, you can check Stone Mountain weather in November.

Compare Stone Mountain's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Stone Mountain

As December settles in Stone Mountain, the weather transforms dramatically compared to other months, ushering in a cooler atmosphere marked by crisp temperatures and increased humidity. With average highs reaching a modest 24°C and lows dipping to -6°C, visitors can expect a significant drop in warmth. Precipitation becomes more frequent, with rain gracing approximately 11 days of the month, contributing to a soggy yet picturesque landscape. This blend of cooler temperatures and moisture creates a unique climate, perfect for outdoor activities that celebrate the season. For a detailed overview of what to expect throughout the year, visit Stone Mountain Climate.