Last updated: February 24, 2025
December in Signal Mountain, United States, is characterized by a cool and damp climate. With maximum temperatures reaching 23°C (73°F) and an average hovering around 8°C (46°F), residents and visitors can expect a distinct chill, occasionally dipping to a frosty -8°C (18°F). The month sees significant precipitation, totaling 139 mm (5.5 in) over 10 days, contributing to an overall humidity level of 88%. This combination of cool temperatures and moisture creates a unique winter atmosphere, making it a captivating time to experience the mountain's serene landscapes.
As December arrives in Signal Mountain, the temperatures begin to reflect the deepening winter chill. With minimums dipping to -8°C (18°F) and an average hovering around 8°C (46°F), the month marks a noticeable transition from the milder autumn days of November. Daytime highs peak at a comfortable 23°C (73°F), offering a brief respite from the cold. While the temperatures are lower than the preceding months, they are still relatively moderate compared to the harsher depths of winter, making December a unique blend of crisp air and occasional warmth. This pattern sets the stage for the cold months ahead, as the area's climate transitions, leaving behind the autumnal warmth and embracing the chill of winter.
In December, Signal Mountain experiences a notable increase in precipitation, with 139 mm (5.5 in) recorded over 10 days. This is a significant rise from November's more modest 72 mm (2.8 in), reflecting the onset of the wetter winter season. Precipitation levels in December can be attributed to a combination of winter rains and occasional snow, contributing to a festive atmosphere. Interestingly, while December's figures are lower than the peak months of January and February, they still indicate a healthy winter pattern that supports the local ecosystem. This trend showcases the transition toward the wetter months, highlighting the region's characteristic seasonal shifts.
In Signal Mountain, United States, December brings a notable spike in humidity, reaching 88%, making it one of the wettest months of the year alongside November. Throughout the year, humidity levels show a gradual decline from early spring’s 85% in March to a low of 64% in September, as warmer months tend to dry the air. However, just as winter approaches, both November and December feature a resurgence in humidity, suggesting that the cold season ushers in a moist atmosphere. This characteristic humidity trend highlights the region's transition from a drier late summer to the more humid winter months, creating a unique climate that influences both weather patterns and local ecosystems.
As December arrives in Signal Mountain, the UV Index dips to 3, placing it in the moderate exposure category with a burn time of 30 minutes. This marks a decrease from the extreme levels seen during the summer months, where the index peaked at 11 from May to July. As the days grow shorter and cooler, the trend toward lower UV levels continues, providing a respite from the intense sun exposure experienced earlier in the year. It's a perfect time for outdoor activities without the fear of quick sunburn, but remember to still wear sunscreen on sunny days. For more details, visit the Signal Mountain UV Index.
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In Signal Mountain, the warmth of December brings a notable but modest embrace of sunshine, with 168 hours lighting up the month. This figure, while lower than the peak summer months of July and August, still represents a significant transition from the autumn months. As daylight wanes toward the year's end, December's sunshine showcases the region's seasonal rhythm, echoing an overall trend of increasing daylight from winter's depths in January, which starts at just 146 hours. Notably, as we journey through the year, the climb from winter to the brilliant 302 hours of sunshine in May paints a vivid picture of the area's luminous summers. Thus, while December may not boast the sunniest of records, it signals the gradual shift toward brighter and warmer days ahead.
In Signal Mountain, the likelihood of sunny weather in December stands at 37%, which is a step down from the preceding month of November, where the sun graced the skies 57% of the time. This decline is part of a broader seasonal trend, as the region transitions into winter. While April enjoys a peak with 52% chance of sunshine, the winter months, including December, tend to be cloudier. Consequently, if you're dreaming of sunny days in December, it's wise to manage your expectations, as the odds are slightly below average compared to other months, but still offer a glimmer of hope for sunlit moments amidst cooler temperatures.
As December arrives in Signal Mountain, the community experiences a noticeable dip in daylight duration, with only 9 hours of light each day. This month marks the tail end of a gradual decrease that began in November, where daylight dwindled to 10 hours. The trend reflects a broader seasonal pattern, with the longest days seen in June and July, each boasting 14 hours of daylight. Following this peak, there's a steady decline, with February and January each holding on to 10 hours before the daylight hours continue their descent. This rhythmic ebb and flow between the seasons not only defines the landscape but also shapes the activities and moods of Signal Mountain's residents throughout the year.
As December arrives in Signal Mountain, the wind begins to pick up, averaging 2.7 m/s (6 mph)—a notable increase from the summer months, where winds dipped as low as 1.6 m/s (4 mph) in August. This transition signifies a shift towards the cooler, crisper air of winter, as the average speeds for this month align closely with the gustier conditions experienced earlier in the year, particularly in March and November. Notably, December's winds mirror the earlier winter months of January and February, which also retain their vigor at 6 mph. This consistent breezy trend in December not only adds a refreshing chill to the landscape but also enhances the beauty of the season as it sweeps through the mountain vistas.
The weather in Signal 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 Signal Mountain and find detailed weather information for every month.
December and January both present chilly conditions, but there are notable differences in their weather patterns. December experiences milder temperatures with an average of 8°C (46°F), peaking at 23°C (73°F), while January is cooler with an average of 6°C (43°F) and a slightly lower minimum temperature of -13°C (9°F). Precipitation is more abundant in December, totaling 139 mm (5.5 in) compared to January's 99 mm (3.9 in), although both months see rain on about 10 days. Humidity levels remain fairly similar, hovering around 88% in December and 87% in January. For a more detailed look at the specifics of January weather, check out Signal Mountain weather in January.
In December, the weather features a wider range of temperatures with a minimum of -8°C (18°F) and a maximum of 23°C (73°F), resulting in an average of 8°C (46°F). The month sees significant precipitation, totaling 139 mm (5.5 in) over about 10 days, coupled with high humidity levels at 88%. In contrast, February brings slightly milder temperatures, with a minimum of -7°C (20°F) and a maximum of 26°C (79°F), leading to an average of 9°C (48°F). However, February experiences increased precipitation, reaching 171 mm (6.7 in) over 14 days, while humidity remains relatively stable at 87%. For a closer look at the weather specifics in February, check out Signal Mountain weather in February.
December weather is characterized by colder temperatures, with a minimum of -8°C (18°F) and an average of 8°C (46°F), while March experiences a milder climate, featuring a minimum of -6°C (22°F) and an average of 12°C (54°F). Although both months see significant precipitation, March has slightly more, totaling 169 mm (6.7 in) over 13 days compared to December's 139 mm (5.5 in) over 10 days. Despite the increased precipitation in March, the humidity is only marginally lower at 85% compared to December's 88%. For a more detailed look at weather trends during March, check out Signal Mountain weather in March.
In December, temperatures can be quite chilly, ranging from a minimum of -8°C (18°F) to an average of 8°C (46°F), with occasional highs reaching up to 23°C (73°F). The month experiences significant precipitation, totaling 139 mm (5.5 in) over about 10 days, accompanied by high humidity levels averaging 88%. In contrast, April brings more moderate temperatures, with a minimum of -1°C (30°F) and an average of 16°C (60°F), peaking at a warm 30°C (87°F). Although April sees slightly more precipitation at 156 mm (6.2 in) over the same number of days, the humidity is marginally lower at 82%. For a detailed look at the weather conditions in April, you can check out Signal Mountain weather in April.
In December, temperatures in Signal Mountain can drop to a chilly minimum of -8°C (18°F) and reach an average of 8°C (46°F), with highs peaking at around 23°C (73°F). This month experiences significant precipitation, averaging 139 mm (5.5 in) over approximately 10 days, and maintains a high humidity level of 88%. In stark contrast, May brings much milder weather, with temperatures ranging from a minimum of 4°C (39°F) to an average of 21°C (70°F) and maximums climbing to 34°C (93°F). The precipitation in May is slightly lower at 96 mm (3.8 in), also spread across about 10 days, but the humidity is a bit lower at 83%. For a more detailed look at May's weather, check out Signal Mountain weather in May.
December and June present starkly contrasting weather conditions. In December, temperatures range from a chilling minimum of -8°C (18°F) to a maximum of 23°C (73°F), with an average of 8°C (46°F). This month experiences higher humidity at 88% and significant precipitation of 139 mm (5.5 in) across approximately 10 days. In contrast, June boasts warmer temperatures, with a minimum of 11°C (51°F) and a maximum reaching up to 34°C (94°F), averaging around 24°C (76°F). While June has slightly lower precipitation of 120 mm (4.7 in) spread over 13 days, it features a more comfortable humidity level at 82%. For more details, you can check this link: Signal Mountain weather in June.
When comparing the weather in December and July, it's clear that the two months present vastly different climates. December features cooler temperatures, with a minimum of -8°C (18°F) and an average of 8°C (46°F), while July boasts much warmer conditions, marked by a minimum of 16°C (61°F) and an average of 26°C (80°F). Precipitation varies as well, with December receiving 139 mm (5.5 in) across 10 days and July slightly less at 106 mm (4.2 in) over 14 days. Additionally, humidity levels are higher in December at 88%, compared to 78% in July. For more detailed information on July weather, you can visit Signal Mountain weather in July.
December and August present strikingly different weather conditions. In December, temperatures can dip as low as -8°C (18°F), with an average of 8°C (46°F) and highs reaching 23°C (73°F). The month is characterized by high humidity at 88% and receives around 139 mm (5.5 in) of precipitation over about 10 days. In contrast, August boasts much milder temperatures, with a minimum of 15°C (60°F), an average of 26°C (78°F), and maximums reaching up to 35°C (96°F). This summer month experiences lower humidity at 67% and slightly less precipitation, totaling 121 mm (4.8 in) over around 14 days. For a closer look at August conditions, visit Signal Mountain weather in August.
In comparing the weather between December and September, notable differences arise in both temperature and humidity. December experiences a much colder range, with minimum temperatures plunging to -8°C (18°F) and maximums reaching 23°C (73°F), contrasted by September's mild temperatures, which typically range from a minimum of 9°C (48°F) to a maximum of 37°C (98°F). Additionally, December's precipitation is higher at 139 mm (5.5 in) over about 10 days, compared to September's 106 mm (4.2 in) over 8 days. The humidity is also significantly higher in December at 88%, while September boasts a more comfortable 64% humidity level. For more detailed September weather information, refer to Signal Mountain weather in September.
In comparing the weather of December and October, we find significant differences in temperature and humidity. December temperatures range from a chilly minimum of -8°C (18°F) to a maximum of 23°C (73°F), averaging at 8°C (46°F). In contrast, October boasts milder conditions with minimums around -2°C (29°F) and maximums reaching an impressive 37°C (99°F), resulting in an average temperature of 18°C (65°F). Additionally, while both months experience similar precipitation levels, December tends to be much more humid, with humidity at 88% compared to October's 74%. For more insights on October conditions, you can visit Signal Mountain weather in October.
In comparing the weather between November and December, December experiences slightly colder temperatures overall, with a minimum of -8°C (18°F) compared to November's -6°C (21°F). The average temperature in December is 8°C (46°F), which is lower than November's 10°C (50°F). While December has a wider range of temperatures with a maximum of 23°C (73°F), November peaks at 26°C (79°F). Additionally, December sees significantly more precipitation, with 139 mm (5.5 in) over 10 days, in contrast to November's 72 mm (2.8 in) over 8 days, indicating a wetter month ahead. The humidity remains similar, with December at 88% and November at 87%. For more details on November weather, visit Signal Mountain weather in November.
As December settles in, Signal Mountain transforms into a winter wonderland, showcasing a distinct chill that contrasts sharply with the milder months. With temperatures dipping down and the average hovering around a crisp 8°C, this month marks the arrival of winter's bite. The higher humidity levels combined with increased precipitation create an often damp and chilly atmosphere, setting the scene for cozy indoor gatherings or thrilling outdoor adventures in the snow. For those keen to explore the full climate spectrum of this beautiful area, be sure to check out Signal Mountain Climate.