Last updated: February 24, 2025
December in Yountville, United States, brings a delightful mix of winter charm and mild temperatures. With an average temperature of 10°C (50°F), residents and visitors enjoy pleasant days, while temperatures can peak at a comfortable 23°C (75°F) and occasionally dip to a chilly 0°C (33°F). This month experiences about 87 mm (3.4 in) of precipitation spread over 8 days, resulting in a humidity level of 83%, enhancing the region's lush, green landscapes. Whether savoring the crisp air or enjoying the cozy ambiance, December is a captivating time to explore Yountville's winter offerings.
In Yountville, United States, December marks the transition into the cooler months, presenting mild winter temperatures. With a minimum of 0°C (33°F) and an average hovering around 10°C (50°F), the days remain comfortably cool, while peaks reach 23°C (75°F), offering pleasant afternoons. Notably, December's temperatures show a slight upward trajectory compared to the preceding months, hinting at a gradual warming trend as the year comes to a close. This combination of crisp air and moderate highs creates a charming winter ambiance, perfect for cozying up and enjoying the seasonal festivities that Yountville has to offer.
December in Yountville sees a significant resurgence in precipitation, with an average of 87 mm (3.4 in) spread over 8 days. This uptick marks a notable contrast to the preceding dry months, particularly the nearly arid summer, where rainfall amounts plummeted to a mere 1 mm in both July and August. As the year draws to a close, December's rainfall contributes to a cumulative annual pattern, with the winter months typically heralding more moisture. This trend highlights a shift in the climate dynamics of Yountville, where the lush landscape benefits from this crucial end-of-year rainfall, setting the stage for a vibrant spring.
In Yountville, United States, December brings a humidity level of 83%, maintaining the high moisture trend that characterizes the winter months. As the year wraps up, the humidity remains relatively consistent with November's 84%, highlighting a notable increase from the summer lows of 36% in August. From January through April, humidity levels hover in the 80s, gradually decreasing to a more comfortable 64% by June, before reaching their annual lows in July. This seasonal transition paints a picture of Yountville’s climate as one that shifts from the dampness of winter to the arid warmth of summer, ultimately creating a diverse and engaging atmosphere throughout the year.
In Yountville, California, December brings a moderate UV Index of 3, mirroring the levels seen in January and November. This reflects a consistent trend during the winter months, where exposure risk is lower and the recommended burn time is about 30 minutes. As the year progresses, Yountville experiences a steady increase in UV levels from early spring through late summer, peaking at an extreme index of 11 in both June and July. By October, the UV Index drops to a more moderate level before settling back into the lower ranges of December. This seasonal fluctuation highlights the importance of being mindful of sun exposure even during the cooler months. For more detailed information, you can visit Yountville UV Index.
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As the year winds down, December in Yountville offers a gentle embrace of sunlight, totaling 185 hours—a warm contrast to the colder months ahead. While this marks a decrease from the vibrant highs of June and July, with 384 and 394 hours respectively, it still holds its charm during the festive season. December shines brighter than the early winter months of January and February, which see significantly fewer sun hours at 141 and 210. This gradual ascent in daylight leading to the year's end hints at a transition, allowing residents and visitors alike to bask in the rich hues of the Napa Valley. As one steps into the new year, the promise of longer days looms ahead, highlighting Yountville's captivating seasonal rhythm.
In Yountville, United States, the likelihood of sunny weather in December presents a notable dip, with only a 35% chance of sunshine. This figure is part of a broader trend that showcases how the sunniest months, such as May and August with chances reaching 85% and 89% respectively, slowly give way to the cooler and cloudier winter months. As the year progresses, sunshine diminishes steadily from the high of March at 63% to the relatively subdued December figures, marking a seasonal transition that promises more overcast days as the festive season approaches. Understanding this pattern helps set expectations for enjoying the scenic beauty of Yountville, even if the sun may not always shine brightly.
In Yountville, United States, the daylight duration exhibits a captivating seasonal rhythm throughout the year. December marks the return of the shorter days, where daylight shrinks to a modest 9 hours. This is a dip from November’s 10 hours, following a gradual decrease from the vibrant 14 hours enjoyed during the summer months of June, July, and August. As autumn unfolds, daylight tapers off, descending through 12 hours in September and 11 hours in October, before settling at its winter minimum. Despite the brevity of days in December, this time invites a cozy atmosphere and the anticipation of longer days ahead as the year begins anew.
As December rolls into Yountville, the winds take on a gentle demeanor, averaging 1.8 m/s (4 mph), a slight dip from the previous months. This subtle decrease follows a trend of fluctuating but generally moderate wind speeds throughout the year, with May showcasing the season’s peak at 2.6 m/s (6 mph). Historically, the winter months bring lighter breezes, with November experiencing the calmest winds, and December offering a tranquil close to the year. The mild winds contribute to Yountville’s serene charm, allowing visitors to bask in the beautiful winter landscapes without the disruptive gusts typical of many other regions. As the holiday season unfolds, the gentle December winds whisper a peaceful end to the year, inviting both locals and travelers to indulge in the town's warmth and festive spirit.
The weather in Yountville 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 Yountville and find detailed weather information for every month.
December and January both feature similar average temperatures, sitting at around 10°C (50°F), yet January experiences slightly cooler minimum temperatures, dipping to -1°C (30°F) compared to December's minimum of 0°C (33°F). Additionally, January tends to be wetter, with a total precipitation of 127 mm (5.0 in) versus December's 87 mm (3.4 in), although both months see rainfall on about 8 days. The humidity remains fairly consistent, with January having a marginally higher average at 84% compared to December's 83%. For a more detailed look at January weather in this region, you can check Yountville weather in January.
In December, the weather typically ranges from a minimum of 0°C (33°F) to a maximum of 23°C (75°F), with an average temperature of 10°C (50°F). The month experiences about 87 mm (3.4 in) of rainfall over approximately 8 days and maintains a high humidity level of 83%.
Conversely, February sees slightly colder temperatures with a minimum of -3°C (28°F), but the average temperature rises to 11°C (53°F) and can reach up to 27°C (81°F). Precipitation increases to 120 mm (4.7 in) over 7 days, with a humidity of 84%.
For more detailed information, you can check out Yountville weather in February. Overall, while February is chillier at its low, it features warmer averages and maxima compared to December.
In comparing the weather of December and March, both months exhibit a minimum temperature around 0°C (32°F), but March typically enjoys a slightly warmer average temperature of 12°C (54°F) compared to December's 10°C (50°F). The maximum temperatures also diverge, with March reaching up to 30°C (86°F), significantly warmer than December's maximum of 23°C (75°F). Precipitation levels are similar, with December receiving 87 mm (3.4 in) over 8 days and March experiencing 84 mm (3.3 in) over 10 days, while both months maintain a humidity level of 83%. For a more detailed look at March weather, visit Yountville weather in March.
When comparing the weather in December and April, notable differences emerge. December experiences cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 23°C (75°F), while April sees a rise, with a minimum of 3°C (37°F) and a maximum of 33°C (92°F). Precipitation also varies significantly, as December averages 87 mm (3.4 in) over 8 days, whereas April has a much lighter 32 mm (1.3 in) over just 5 days. Despite the slight difference in humidity, with December at 83% and April at 81%, the overall enjoyment of outdoor activities is generally higher in April due to the more temperate weather. For those looking to explore further, check out Yountville weather in April.
The weather in December offers a cooler climate with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 23°C (75°F), averaging around 10°C (50°F). This month sees higher humidity levels at 83% and considerable precipitation, totaling 87 mm (3.4 in) over about eight days. In contrast, May brings much warmer weather, with temperatures fluctuating between a minimum of 4°C (40°F) and a scorching maximum of 38°C (101°F), averaging 19°C (66°F). Precipitation is significantly lower in May, amounting to just 20 mm (0.8 in) over two days, and the humidity drops to 74%. For more details, check out Yountville weather in May.
December and June present stark contrasts in weather patterns. In December, temperatures range from a chilly 0°C (33°F) at their lowest to a comfortable 23°C (75°F) at their peak, accompanied by an average of 10°C (50°F). This month experiences relatively high humidity at 83% and notable precipitation of 87 mm (3.4 inches) over about 8 days, making it a wetter and cooler time of year. In contrast, June boasts a much warmer climate, with minimum temperatures around 9°C (49°F) and soaring up to a sweltering 42°C (108°F), averaging 23°C (74°F). The dry conditions in June are marked by negligible rainfall of just 2 mm (0.1 inches) and no rainy days, along with lower humidity at 64%. For a more detailed look at the warm June weather, check out Yountville weather in June.
December and July present stark contrasts in weather patterns. In December, temperatures range from a chilly minimum of 0°C (33°F) to a comfortable average of 10°C (50°F), peaking at a pleasant 23°C (75°F). This month is characterized by higher humidity at 83% and significant precipitation, with 87 mm (3.4 in) expected over about 8 days. In contrast, July boasts much warmer temperatures, with a minimum of 12°C (54°F), an average of 24°C (76°F), and a scorching maximum of 41°C (106°F). Rain is virtually absent in July, with only 1 mm (0.0 in) of precipitation recorded over the month, and it features significantly lower humidity at just 44%. For more details on the weather in July, you can visit Yountville weather in July.
December and August present strikingly different weather patterns. December brings cooler temperatures, with averages hovering around 10°C (50°F) and highs reaching 23°C (75°F). The month experiences significant precipitation, totaling 87 mm (3.4 in) over about 8 days, accompanied by high humidity levels at 83%. In contrast, August basks in warmth, with minimum temperatures around 11°C (52°F) and average highs soaring to 24°C (75°F), peaking at a scorching 43°C (109°F). This summer month enjoys completely dry conditions, with no recorded rainfall and a much lower humidity level of 36%. For more detailed information, check out Yountville weather in August.
When comparing the weather in December and September, it's clear that these months present stark contrasts. December features cooler temperatures ranging from a minimum of 0°C (33°F) to a maximum of 23°C (75°F), with an average of 10°C (50°F). Additionally, December sees significant precipitation, with 87 mm (3.4 in) falling over 8 days and higher humidity levels at 83%. In contrast, September boasts much warmer conditions, with temperatures ranging from a minimum of 7°C (45°F) to a scorching maximum of 44°C (112°F), and an average of 22°C (72°F). Notably, September experiences almost no rainfall, recording just 1 mm (0.0 in) over the entire month and a lower humidity of 44%. For more details on the September climate, check out Yountville weather in September.
Comparing the weather in December and October reveals some notable differences. In December, temperatures range from a chilly minimum of 0°C (33°F) to a mild maximum of 23°C (75°F), with an average temperature of around 10°C (50°F). The month experiences higher precipitation, totaling 87 mm (3.4 in) over 8 days, along with increased humidity at 83%. In contrast, October offers much warmer conditions, with minimum temperatures of 4°C (39°F) and a striking maximum of 38°C (101°F). The average temperature sits at 19°C (66°F), and precipitation is significantly lower at 31 mm (1.2 in) spread over only 2 days, resulting in a more comfortable humidity level of 65%. For more details on October's climate, you can check Yountville weather in October.
When comparing the weather in December to that of November, notable differences emerge. December experiences a wider temperature range, with a minimum of 0°C (33°F) and a maximum of 23°C (75°F), leading to an average temperature of 10°C (50°F). In contrast, November is generally warmer, showcasing a minimum of -1°C (30°F) and a maximum of 29°C (85°F), resulting in a higher average of 13°C (56°F). Precipitation is also more frequent in December, occurring on 8 days with a total of 87 mm (3.4 in), compared to November's 43 mm (1.7 in) over 5 days. Humidity levels are quite similar, with December at 83% and November at 84%. For a closer look at November's weather specifics, you can check out Yountville weather in November.
December in Yountville brings a distinct shift from the warm, dry months that precede it. The temperature cools down significantly, inviting a refreshing chill that contrasts with the summer's heat. With increased humidity adding to the crispness of the air, this month also experiences more frequent rain, making it one of the wetter periods of the year. The transformation in weather not only highlights the beauty of the surrounding vineyards draped in a seasonal glow but also sets the stage for a cozy atmosphere that’s perfect for holiday celebrations. For those curious about Yountville's annual climate, explore more at Yountville Climate.