December Weather in Chattanooga, United States

Last updated: February 24, 2025

In Chattanooga, December brings a distinct chill, with maximum temperatures reaching 23°C (73°F) and minimums dropping to a brisk -8°C (18°F). The average temperature hovers around a cool 8°C (46°F). Rainfall is a notable feature of this month, with precipitation totaling 139 mm (5.5 inches) over approximately 10 days, contributing to a humidity level of 88%. This blend of cool temperatures and significant moisture sets the stage for a winter ambiance that residents and visitors alike can appreciate.

December Temperature in Chattanooga

In Chattanooga, December ushers in a noticeable chill, with temperatures typically ranging from a minimum of -8°C (18°F) to an average of 8°C (46°F), peaking at a mild 23°C (73°F). This month marks a transition into winter, where the days grow shorter and the air crisp, particularly in stark contrast to the preceding autumn months. The decline in average temperatures from November, which averaged around 10°C (50°F), hints at the approaching coldest months ahead. While December can still see some warmer days, the overall trend signifies the start of a more frigid season, beckoning visitors and locals alike to bundle up and enjoy the festive cheer that blankets the city.

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

The chart illustrates December temperature patterns in Chattanooga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec434854607076797874645046
Data source: Temperature data for Chattanooga 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 Chattanooga

In December, Chattanooga experiences a notable shift in precipitation, accumulating approximately 139 mm (5.5 in) over 10 days of rainfall. This marks a significant increase from the preceding months, with November's meager 72 mm (2.8 in) over only 8 days. The December rainfall aligns closely with the wetter months of early spring, showcasing a trend of increased moisture as the year wraps up. This consistent precipitation not only brings a sense of rejuvenation to the region but also sets the stage for the lush growth that follows in the coming months. Overall, Chattanooga's December weather reflects the onset of winter's wet season, contributing to its dynamic climate.

December Precipitation Trends in Chattanooga

The chart displays monthly precipitation patterns in Chattanooga, 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.
JanFebMarAprMayJunJulAugSepOctNovDec991711691569612010612110613372139
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Chattanooga

In Chattanooga, December marks the culmination of a year characterized by fluctuating humidity levels. As winter approaches, the humidity rises to 88%, echoing the dampness seen in the winter months of January and February, both holding steady at 87%. This seasonal increase contrasts sharply with the summer months, where humidity typically drops to its lowest point in August at 67% and further decreases to 64% by September. Following this trend, the humidity begins to climb again in the fall, peaking in December, which serves as a reminder of the region's moist climate that can linger through the colder months. Overall, the humidity landscape in Chattanooga reveals a clear pattern: high humidity prevails in winter, dipping during the hotter, more arid summer months before rising again as the year draws to a close.

December Average Humidity in Chattanooga

This chart illustrates the average monthly humidity levels in Chattanooga, 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.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chattanooga

In December, Chattanooga experiences a decline in UV exposure, with the UV Index dropping to a moderate 3 and a burn time of about 30 minutes. This marks a change from the extreme levels seen during the summer months, where indices peaked at 11 in May through July, necessitating caution in sun exposure. As winter sets in, the city enjoys more moderate conditions, making it a great time to enjoy outdoor activities with less risk of sunburn. The gradual decrease in UV levels from fall through winter highlights the importance of adjusting sun safety habits according to seasonal changes. For more information on UV levels throughout the year, visit Chattanooga UV Index.

Maximum UV Index Levels in Chattanooga for December

The chart shows the monthly maximum UV Index (UVI) for Chattanooga 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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109753
Data source: Chattanooga 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 Chattanooga

December in Chattanooga offers a refreshing blend of sunshine, typically characterized by 168 hours of bright days. While this marks a decrease from the sun-soaked summer months, where July sees a peak of 317 hours, December still stands out with more sunlight than the early winter months of January and February. The gradual decline in hours from the vibrant spring and summer months is evident, yet there's a cozy charm to the crisp December air softened by radiant daylight. This trend highlights how Chattanooga embraces a gentle transition into winter, offering residents and visitors alike a chance to enjoy the outdoors even as the chill sets in.

Monthly Sunshine Duration in Chattanooga: December Highlighted

The December sunshine duration represents the total number of hours Chattanooga 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.
JanFebMarAprMayJunJulAugSepOctNovDec146h153h217h265h302h300h317h305h276h253h226h168h
Data source: Chattanooga December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Chattanooga During December

In Chattanooga, the chances of sunny weather in December hover around 37%, maintaining a trend similar to the sunnier months of January and March, which both sit at 36%. This percentage shows a modest increase compared to the relatively brighter November with its 57% chance of sunshine. Interestingly, while December may not boast the highest likelihood of clear skies, it reflects the region's overall variability in weather patterns. Following October's 36%, the winter month aligns closely with several other mid-winter predictions, suggesting a mixed bag where occasional sunny days can brighten the shorter days toward year-end.

Percentage of Sunny Days in December in Chattanooga

The chart illustrates the percentage of sunny days in Chattanooga 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 Chattanooga experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec36%38%36%52%31%37%39%35%49%36%57%37%
Data source: Chattanooga December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Chattanooga in December

As December settles in Chattanooga, sunlight wanes, offering only about 9 hours of daylight—a stark contrast to the longer days of mid-summer. This gradual decline from 14 hours in June, the peak of bright summer days, reflects a seasonal shift towards winter. The progression of daylight hours throughout the year showcases a rich tapestry of change, with the most drastic drop occurring as autumn gives way to winter. As December unfolds, residents may find themselves embracing cozy indoors and festive lights, fully aware that this shorter span of sunlight is merely a precursor to the gradual return of longer days come spring.

Average Daylight Hours in Chattanooga for December

The chart illustrates the variation in daylight duration in Chattanooga throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 5m10h 55m11h 59m13h 5m14h14h 27m14h 12m13h 23m12h 20m11h 15m10h 18m9h 49m
Data source: Chattanooga daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Chattanooga

As December settles over Chattanooga, the winds pick up slightly, averaging 2.7 m/s (6 mph). This increase marks a notable contrast to the lull of summer months, particularly July and August, when the average wind speed dips to around 1.8 m/s (4 mph). Transitioning through the year, late autumn and early winter show a gentle uptick in breeziness, with November hovering at 2.3 m/s (5 mph). The late year resurgence hints at seasonal shifts and the impending chill of winter, inviting both residents and visitors to enjoy the crisp, invigorating air that December brings. Overall, the wind speed trends in Chattanooga reflect a pattern of subtle increases with the approach of winter, offering a refreshing reminder of nature's rhythms.

Average December Wind Speed in Chattanooga

The chart displays monthly wind speed patterns in Chattanooga, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.52.72.82.52.42.11.81.61.82.12.32.7 m/s
Data source: Chattanooga December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Chattanooga Compares to Other Months

The weather in Chattanooga 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 Chattanooga and find detailed weather information for every month.

December and January present distinct yet somewhat similar weather patterns. In December, temperatures range from a minimum of -8°C (18°F) to a maximum of 23°C (73°F), with an average temperature of 8°C (46°F). The month sees significant precipitation at 139 mm (5.5 in) over 10 days, accompanied by high humidity levels at 88%. In contrast, January experiences colder temperatures, with a minimum of -13°C (9°F), an average of 6°C (43°F), and a slightly warmer maximum of 24°C (75°F). Precipitation decreases to 99 mm (3.9 in), still covering 10 days, but humidity remains comparable at 87%. For more details on January weather, you can visit Chattanooga weather in January.

December and February exhibit similar cold temperatures, with February being slightly warmer on average, recording an average temperature of 9°C (48°F) compared to December's 8°C (46°F). Both months experience significant precipitation, but February sees more rainfall at 171 mm (6.7 in) over 14 days compared to December’s 139 mm (5.5 in) over 10 days. Humidity levels remain fairly consistent, with December at 88% and February at 87%. For more detailed insights on February’s weather, you can visit Chattanooga weather in February.

In December, the weather features a minimum temperature of -8°C (18°F) and an average of 8°C (46°F), with a maximum reaching 23°C (73°F). The month experiences significant precipitation, amounting to 139 mm (5.5 in) over about 10 days, and maintains a high humidity level of 88%. In contrast, March sees slightly milder temperatures with a minimum of -6°C (22°F), an average of 12°C (54°F), and a maximum of 29°C (84°F). The precipitation increases to 169 mm (6.7 in) over 13 days, while humidity remains relatively high at 85%. Overall, March tends to be warmer and wetter than December, as highlighted in more detail at Chattanooga weather in March.

December and April present distinct contrasts in weather patterns. In December, temperatures range from a chilly minimum of -8°C (18°F) to a comfortable maximum of 23°C (73°F), with an average of 8°C (46°F). The month experiences significant precipitation, totaling 139 mm (5.5 in) over about 10 days, coupled with a high humidity level of 88%. In contrast, April sees a milder climate with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 30°C (87°F), averaging at 16°C (60°F). This month is slightly wetter, with 156 mm (6.2 in) of precipitation also over 10 days, but humidity declines to 82%. For more details on the specific conditions of April, you can check Chattanooga weather in April.

December and May exhibit stark contrasts in weather patterns. In December, temperatures can plummet to a minimum of -8°C (18°F) and average around 8°C (46°F), while reaching a maximum of 23°C (73°F). The month is characterized by high humidity at 88% and significant precipitation of 139 mm (5.5 in) over about 10 days. In contrast, May boasts milder minimum temperatures at 4°C (39°F) and a much warmer average of 21°C (70°F), peaking at 34°C (93°F). Although May sees slightly less rainfall at 96 mm (3.8 in), the humidity remains relatively high at 83%. For a more detailed look at the conditions you can expect, check out Chattanooga weather in May.

In December, the weather is considerably colder with temperatures ranging from a minimum of -8°C (18°F) to a maximum of 23°C (73°F), averaging around 8°C (46°F). The month experiences high humidity at 88% and a total precipitation of 139 mm (5.5 in) over approximately 10 days. In contrast, June brings warmer temperatures, with a minimum of 11°C (51°F) and a maximum reaching 34°C (94°F), averaging at 24°C (76°F). The humidity is slightly lower at 82%, and precipitation totals around 120 mm (4.7 in) across about 13 days. For more details on June weather, check out Chattanooga weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures range from a chilly minimum of -8°C (18°F) to a pleasant average of 8°C (46°F), occasionally peaking at 23°C (73°F). This month experiences significant precipitation, with 139 mm (5.5 in) falling over approximately 10 days, and a high humidity level of 88%. In contrast, July brings warmth, with daytime temperatures ranging from a minimum of 16°C (61°F) to an average of 26°C (80°F), and highs reaching up to 37°C (98°F). Although July sees slightly less precipitation at 106 mm (4.2 in) over 14 days, the humidity is notably lower at 78%. For more detailed information, you can explore Chattanooga weather in July.

December and August present two distinct weather contrasts. In December, temperatures can drop to a chilling minimum of -8°C (18°F), with an average of 8°C (46°F) and peaks reaching 23°C (73°F). The month is characterized by high humidity at 88% and significant precipitation of 139 mm (5.5 in) over about 10 days, creating a cold and damp atmosphere. In contrast, August brings much warmer temperatures, with a minimum of 15°C (60°F) and averages around 26°C (78°F), peaking at a hot 35°C (96°F). Although precipitation is slightly less at 121 mm (4.8 in), it occurs over more days—14 in total—and the humidity is significantly lower at 67%, making the summer month feel much more comfortable. For more details on weather conditions during August, you can refer to Chattanooga weather in August.

The weather in December contrasts sharply with that of September. December typically experiences much colder temperatures, with a minimum of -8°C (18°F) and an average around 8°C (46°F), compared to September's milder range of 9°C (48°F) to a high of 37°C (98°F). Additionally, December sees more precipitation, totaling 139 mm (5.5 in) over about 10 days, whereas September has slightly less at 106 mm (4.2 in) across 8 days. Humidity levels also differ significantly, with December averaging 88% compared to September's 64%. For more detailed insights, you can explore Chattanooga weather in September.

When comparing the weather in December to that of October, one can observe distinct differences in temperature and humidity. December features a much colder temperature range, with minimums reaching as low as -8°C (18°F), while October enjoys milder conditions with lows around -2°C (29°F) and an average temperature of 18°C (65°F). Additionally, October can see a maximum temperature soaring up to 37°C (99°F), which is considerably warmer than December's maximum of 23°C (73°F). Both months experience similar levels of precipitation, with December receiving 139 mm (5.5 in) and October slightly less at 133 mm (5.2 in), both over approximately 10 days. However, December's humidity is significantly higher at 88% compared to October's 74%, contributing to a much more damp and chilly atmosphere. For more detailed insights, you can check Chattanooga weather in October.

In comparing the weather between December and November, notable differences emerge. December experiences slightly colder temperatures, with a minimum of -8°C (18°F) and an average of 8°C (46°F), while November boasts a milder minimum of -6°C (21°F) and an average of 10°C (50°F). The maximum temperatures in December reach up to 23°C (73°F), which is lower than November's maximum of 26°C (79°F). Additionally, December is significantly wetter, with 139 mm (5.5 in) of precipitation over 10 days, compared to November’s 72 mm (2.8 in) over 8 days. The humidity remains similar, with December at 88% and November at 87%. For more detailed information, you can check Chattanooga weather in November.

Compare Chattanooga's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Chattanooga

December in Chattanooga ushers in a notable shift in weather, with much cooler temperatures compared to the warmer months. The chill of winter is palpable, as average daily temperatures hover around a brisk 8°C (46°F), while maximums struggle to reach 23°C (73°F). Additionally, the city experiences increased precipitation with about 10 rainy days, contributing to the overall humidity of 88%. This transition to winter weather not only brings a cozy atmosphere but also highlights the unique character of Chattanooga's climate during this month. For a deeper dive into the weather patterns throughout the year, visit Chattanooga Climate.