Last updated: February 24, 2025
Discover the enchanting beauty of Yosemite Valley in December, where temperatures typically range from a maximum of 12°C (55°F) to a chilling minimum of -17°C (1°F), setting the stage for a winter wonderland. The average temperature hovers around -3°C (27°F), requiring visitors to dress warmly and enjoy the crisp, fresh air. December sees about 160 mm (6.3 in) of precipitation across 10 days, contributing to the valley's stunning seasonal landscapes, complete with frosty mornings and the possibility of snow-capped peaks. With a humidity level of 79%, the atmosphere is invigorating, making December a magical time to experience Yosemite's breathtaking vistas and serene surroundings.
In Yosemite Valley, December marks the beginning of winter's full embrace, with temperatures reflecting a chill that intensifies throughout the month. The minimum temperature averages around -17°C (1°F), while daily highs hover near 12°C (55°F), creating a stark contrast. This seasonal dip aligns with the general trend observed since November, where temperatures begin to drop significantly, peaking during January and February. The average temperature sits at -3°C (27°F), indicative of the cold, crisp air that fills the valley, giving way to stunning winter landscapes. As visitors arrive to marvel at the snow-dusted granite cliffs, they can expect a refreshing, albeit chilly experience in this majestic winter wonderland.
In December, Yosemite Valley sees a significant uptick in precipitation, totaling 160 mm (6.3 in) over approximately 10 days. This marks a continuation of the wetter trend established in November, which was recorded at 98 mm (3.9 in). The winter months usher in crucial moisture for the region, with December's rainfall nearly doubling some of the drier summer months, such as July and August, which received only 24 mm (0.9 in) and 17 mm (0.7 in), respectively. The December rains play a vital role in replenishing the valley’s ecosystems, setting the stage for the vibrant life that flourishes as the seasons transition. As the precipitation patterns indicate, the winter months are not only wetter but also vital for maintaining the health of Yosemite’s stunning landscapes.
In Yosemite Valley, December signifies a transition as humidity levels settle at 79%, a slight dip from the previous month's 78%. This month marks the closing of a year where humidity observed a gradual decline from late spring through summer, dropping to its lowest point of 30% in August. As autumn progresses, humidity rebounded, with November showcasing a notable increase. Overall, the trend reflects a seasonal pattern, where the crispness of winter air returns, enveloping the valley in a misty embrace, setting the stage for a beautiful and serene winter landscape ahead.
In Yosemite Valley, December marks a return to the moderate UV Index level of 4, similar to January, with a burn time of 30 minutes. This indicates a noticeable dip in UV exposure compared to the summer months, where values soared to an extreme index of 12 from May through July. As the year progresses, the UV Index climbs sharply from the mild levels in winter to very high and extreme categories in spring and summer, culminating in the highest levels just before the fall. The drop in December provides a seasonal respite, allowing visitors to enjoy the winter landscape while still being mindful of sun exposure. For more insights and daily updates, check the Yosemite Valley UV Index.
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In Yosemite Valley, December brings a gentle transition as daylight hours decrease to 210 but still provide glimpses of the magnificent scenery. Following the vibrant highs of summer, where July and June bask in nearly 400 hours of sunshine, the valley begins its serene descent into winter. Despite the shorter days, December's sunshine evokes a tranquil charm, contrasting with the peak months, such as May with its robust 366 hours. The steady decline from autumn with November's 241 hours indicates winter's approach, yet each sun-filled hour in December paints the breathtaking landscapes with a soft glow, inviting visitors to embrace the serene beauty of the season.
In Yosemite Valley, December brings a notable dip in sunny weather, with a mere 40% chance of sunshine. This decline follows a consistent upward trend in sunny days throughout the year, peaking in the summer months, particularly August at a striking 92%. As the seasons transition from the vibrant colors of autumn to the winter chill, the likelihood of clear skies gradually decreases, dropping from 65% in November to December's low. While the allure of Yosemite's winter landscape is undeniable, those seeking sun during this month might find themselves disappointed as the clouds often take center stage.
As December envelops Yosemite Valley, the daylight duration wraps up the year at a modest 9 hours, mirroring the shorter days of January. This pattern of diminishing light begins in late autumn, with daylight steadily declining from 10 hours in November. However, a glance at the year reveals an intriguing seasonal rhythm; daylight stretches its arms wider from February’s 10 hours to a peak of 14 hours during the summer months, particularly in June and July. Following this summer zenith, daylight begins to recede once more, gradually ushering in winter's embrace as the days shorten again. This cyclical dance of light plays a pivotal role in shaping the stunning landscapes and vibrant ecosystems of Yosemite, offering visitors a unique experience with each passing season.
As December sweeps into Yosemite Valley, it brings a slight increase in average wind speed to 2.2 m/s (5 mph), the highest for the year. This subtle rise marks a shift from the calmer months of late autumn, where November recorded a dip to 1.8 m/s (4 mph). Throughout the year, Yosemite's winds remain relatively gentle, averaging around 2.1 m/s for most months with only minor fluctuations. The transition from fall to winter, highlighted by December's breezier conditions, invites visitors to experience the valley’s enchanting landscapes under a crisp, invigorating atmosphere. As the winds pick up, they carry the scent of pine and the promise of frosty adventures ahead, making this serene yet powerful natural setting even more captivating.
The weather in Yosemite Valley 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 Yosemite Valley and find detailed weather information for every month.
December and January weather exhibit some similarities and differences characteristic of winter months. In December, temperatures range from a minimum of -17°C (1°F) to a maximum of 12°C (55°F), with an average of -3°C (27°F). The month experiences about 160 mm (6.3 in) of precipitation over 10 days, accompanied by a humidity level of 79%. In contrast, January sees slightly colder conditions, with a minimum temperature of -18°C (0°F) and a maximum of 11°C (51°F), while maintaining the same average temperature of -3°C (27°F). Interestingly, January has a higher precipitation level of 227 mm (9.0 in) across 9 days, resulting in a slight increase in humidity to 82%. To explore more about the winter weather in Yosemite Valley, check out Yosemite Valley weather in January.
In December, the weather features a milder range of temperatures, with lows reaching -17°C (1°F) and highs peaking at 12°C (55°F), while February sees even lower minimum temperatures of -21°C (-5°F), though the maximum temperature only slightly increases to 13°C (56°F). Both months maintain an average temperature of around -3°C (27°F), but February experiences higher precipitation, totaling 226 mm (8.9 in) compared to December's 160 mm (6.3 in), with precipitation days slightly increasing from 10 to 11 days. Additionally, February's humidity is higher at 85%, compared to December's 79%. For more detailed insights, you can visit Yosemite Valley weather in February.
In December, the weather typically sees a minimum temperature of -17°C (1°F) and an average of -3°C (27°F), with a maximum reaching 12°C (55°F), while March experiences similar minimum and slightly increased maximum temperatures, with a range of -17°C (1°F) to 13°C (56°F) and an average of -2°C (29°F). Precipitation is also higher in March, totaling 209 mm (8.2 in) over 13 days compared to December's 160 mm (6.3 in) across 10 days. Both months maintain high humidity levels, though March's average humidity is slightly higher at 80% compared to December's 79%. For more information on specific weather patterns, you can check the Yosemite Valley weather in March.
In December, the weather tends to be significantly colder, with temperatures ranging from a minimum of -17°C (1°F) to a maximum of 12°C (55°F), while April sees slightly milder conditions, with temperatures fluctuating between a minimum of -18°C (0°F) and a maximum of 16°C (60°F). Precipitation is more abundant in December, averaging 160 mm (6.3 in) over about 10 days, compared to April's 102 mm (4.0 in) across 8 days. Additionally, December is characterized by higher humidity levels at 79%, whereas April's humidity is somewhat lower at 72%. For a more detailed overview of conditions during this time, check out Yosemite Valley weather in April.
The weather in December is characterized by much colder temperatures, with average lows around -3°C (27°F) and highs reaching only 12°C (55°F). In stark contrast, May experiences a notable warming trend, featuring average temperatures ranging from -13°C (9°F) to a pleasant 24°C (75°F). Despite December's increased precipitation, totaling 160 mm (6.3 in) over about 10 days, May's rainfall is significantly lower at 68 mm (2.7 in) across 11 days, coupled with lower humidity levels of 58% compared to December's 79%. For a more specific look at the climate during this vibrant spring month, you can check out Yosemite Valley weather in May.
December and June present stark contrasts in weather patterns. In December, temperatures can plummet to a minimum of -17°C (1°F) and typically hover around -3°C (27°F), with a maximum of only 12°C (55°F). This winter month is characterized by significant precipitation, averaging 160 mm (6.3 in) over approximately 10 days, along with a humid atmosphere at 79%. On the other hand, June offers a much more pleasant climate, with temperatures ranging from a minimum of -5°C (24°F) to an average of 13°C (55°F), peaking at a comfortable 27°C (81°F). Precipitation in June is minimal, totaling just 20 mm (0.8 in) across about 5 days, and the humidity drops to a more comfortable 49%. For more details on the weather during this time, visit Yosemite Valley weather in June.
When comparing the weather in December and July, it's evident that each month embodies a stark contrast. December experiences frigid temperatures, with lows plummeting to -17°C (1°F) and an average of -3°C (27°F), while July enjoys a much milder climate, with temperatures ranging from a minimum of 3°C (37°F) to an average of 17°C (63°F) and peaks reaching 29°C (85°F). Precipitation levels also differ significantly; December sees 160 mm (6.3 in) over approximately 10 days, whereas July has a mere 24 mm (0.9 in) spread over just 6 days. Additionally, December's humidity is notably higher at 79%, in contrast to July's much drier atmosphere at 36%. For more details on the warm summer conditions, visit Yosemite Valley weather in July.
December and August present a stark contrast in weather conditions. December experiences frigid temperatures, with a minimum of -17°C (1°F) and an average around -3°C (27°F), while August enjoys much milder warmth, averaging 16°C (62°F) and reaching highs of 29°C (84°F). In terms of precipitation, December is significantly wetter, receiving 160 mm (6.3 in) over approximately 10 days, compared to August's minimal 17 mm (0.7 in) spread over just 5 days. Additionally, December's humidity is notably higher at 79%, while August boasts a much drier atmosphere with only 30% humidity. For more details on the weather patterns during this summer month, check out Yosemite Valley weather in August.
December and September present strikingly different weather conditions. In December, temperatures can plummet to a minimum of -17°C (1°F) with an average around -3°C (27°F), while highs reach only 12°C (55°F). The month is quite wet, with around 160 mm (6.3 in) of precipitation spread over 10 days, coupled with a high humidity of 79%. In contrast, September enjoys milder temperatures, ranging from a minimum of -8°C (18°F) to an average of 13°C (55°F), peaking at 28°C (83°F). Precipitation is minimal in September, with only 17 mm (0.7 in) over 4 days and a much lower humidity of 42%. For more details on weather in September, check out Yosemite Valley weather in September.
December weather is characterized by much colder temperatures, with minimums reaching as low as -17°C (1°F) and an average of -3°C (27°F), compared to October's milder minimum of -10°C (15°F) and an average of 7°C (44°F). Additionally, December experiences significantly more precipitation, averaging 160 mm (6.3 in) over 10 days, while October has only 43 mm (1.7 in) spread across just 3 days. Humidity also increases in December, averaging 79%, compared to October's 59%. For more on how the weather in October influences outdoor activities, check out Yosemite Valley weather in October.
In comparing the weather between November and December, we see a notable shift in temperatures and precipitation levels. November experiences slightly colder minimum temperatures, reaching down to -20°C (-4°F), while December's minimum is milder at -17°C (1°F). The average temperature in November is 2°C (36°F), compared to December's average of -3°C (27°F). Precipitation also increases in December, totaling 160 mm (6.3 in) over 10 days, compared to November's 98 mm (3.9 in) over just 6 days. Interestingly, humidity levels remain fairly consistent, with November at 78% and December slightly higher at 79%. For more detailed insights, be sure to check Yosemite Valley weather in November.
In December, Yosemite Valley experiences a unique climate shift, marked by colder temperatures and higher precipitation than other months of the year. While daytime highs hover around a brisk 12°C, nighttime lows can plunge to a chilling -17°C, creating a striking contrast that transforms the landscape into a winter wonderland. The increased humidity can lead to frequent snowfalls, drenching the valley with roughly 160 mm of precipitation over ten days, making it an ideal time for those seeking the serene beauty of the park's snowy scenery. For more insights into how these seasonal changes impact your visit, explore detailed information at Yosemite Valley Climate.