Last updated: February 24, 2025
Mount Shasta in December presents a charming winter landscape, where temperatures vary from a chilly -10°C (14°F) at night to a pleasant 17°C (63°F) during daytime highs. The average temperature hovers around 1°C (34°F), inviting visitors to experience crisp air and serene surroundings. Precipitation is noticeable, with 153 mm (6.0 in) over 12 days, creating a festive atmosphere amidst the snow. High humidity at 86% adds to the moody ambiance, making December a captivating month for those seeking winter adventures in this picturesque region.
December in Mount Shasta marks a transition into the heart of winter, characterized by chilly temperatures that invite snow-covered landscapes. With minimums dipping to -10°C (14°F) and average daytime highs reaching around 1°C (34°F), the month sets a brisk tone that begins to mirror the cold depths of January. Despite the crisp conditions, temperatures tend to remain relatively mild for a winter month, with maximums peaking at 17°C (63°F). This combination of cooler nights and moderate daytime warmth creates a picturesque winter scene, perfect for outdoor activities like skiing or snowshoeing. As the year concludes, Mount Shasta's December charm showcases the region's rugged beauty, layered in frost yet full of potential for adventure.
In December, Mount Shasta experiences a significant uptick in precipitation, accumulating 153 mm (6.0 in) over approximately 12 days of rain. This increase marks a continuation of the wetter trend observed since the fall months, including November's 128 mm (5.1 in) over 9 days. Notably, as winter approaches, the region transitions from the drier summer months, where rainfall barely reaches 5 mm (0.2 in) in July and August. The consistent rise in precipitation leading into December not only enhances the stunning winter landscape but also prepares the area for a robust snowpack, crucial for ecosystems and water supply alike. As the year draws to a close, December's rainfall solidifies its reputation as a key month for replenishing Mount Shasta's natural resources.
In December, Mount Shasta experiences a return to its winter humidity levels, with humidity at 86%, mirroring the figures seen in January and November. This increase marks a significant shift from the drier summer months, where humidity dropped to a low of 42% in August. As the seasons transition from the heat of summer to the cooler embrace of winter, humidity levels gradually rise, peaking again during the closing months of the year. Overall, December's humidity suggests a consistent winter pattern, creating a refreshing, crisp atmosphere that complements the snowy landscape typical of this time.
As December rolls into Mount Shasta, the UV Index settles at a moderate level of 3, mirroring the conditions of January. This indicates a more relaxed sun exposure scenario, with a burn time of approximately 30 minutes for those enjoying the outdoors. The trend over the course of the year reveals a sharp increase in UV intensity from the spring months onwards, peaking in May and June with extreme levels reaching up to 12. As fall wanes, there’s a noticeable decline in UV exposure, pulling back to more manageable levels in the winter months. Understanding these seasonal shifts is crucial for safe sun practices, especially during the sunnier months. For more details, visit Mount Shasta UV Index.
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In December, Mount Shasta experiences a notable shift as it transitions from the vibrant sunshine of summer to the brisk embrace of winter. With an average of 160 hours of sunshine, the month offers a cozy respite compared to the bustling 402 hours of sunlight enjoyed in July. While December doesn't quite bask in the abundant warmth of earlier months, such as May and June with their 352 and 386 hours respectively, it does carry a distinct charm, inviting visitors to savor the crisp air and seasonal beauty. As daylight hours dwindle, the allure of snowy landscapes and festive ambiance emerges, making Mount Shasta a serene winter wonderland.
In Mount Shasta, the likelihood of sunny weather displays a clear seasonal trend throughout the year. As the calendar turns from December to summer, the chance of sunshine consistently rises, peaking in the sun-drenched months of July and August with probabilities of 84% and 87%, respectively. However, December captures the tail end of the year with a modest 30% chance of sunny days, reflecting the colder months' tendency towards cloudier skies. Following December, the percentages begin to climb as winter wanes, leading to a promising April and May, where sunshine becomes increasingly abundant, hinting at the vibrant blossoming of spring. Overall, December offers a less favorable outlook for sun-seekers, but the approaching months are sure to brighten the landscape.
In Mount Shasta during December, daylight lingers for about 9 hours, mirroring the shorter days of November. As the year unfolds, we observe a gradual increase in daylight, peaking at 15 hours in June, the height of summer. This trend reverses as the days wane, with daylight dwindling back to 9 hours by early winter. While December may usher in the season's cold and snow, it also signifies a comforting return of the long, warm days that follow, inviting anticipation for the brighter months ahead.
As winter settles in Mount Shasta, December brings a slight increase in wind speed, averaging 2.0 m/s (4 mph), continuing a trend of relatively gentle breezes throughout the colder months. The winds remain calm, with speeds generally hovering between 1.9 and 2.4 m/s from January to March, providing a stark contrast to the stronger gusts that might characterize other winter locales. This consistency, coupled with a slight dip in wind speed during July and August, highlights a subtle seasonal rhythm where the breezes are notably softer yet persistent. Overall, December's winds gently echo the tranquility of the season, offering a serene atmosphere amidst the breathtaking winter landscapes.
The weather in Mount Shasta 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 Mount Shasta and find detailed weather information for every month.
December and January weather exhibits notable differences, particularly in temperature and precipitation patterns. December sees milder extremes, with a minimum temperature of -10°C (14°F) and a maximum reaching up to 17°C (63°F), while January experiences colder lows of -19°C (-3°F) and a maximum of only 14°C (58°F). Both months have similar average temperatures around 1°C (34°F), but January generally has more precipitation, totaling 227 mm (8.9 in) over 13 days compared to December's 153 mm (6.0 in) over 12 days. Despite the increased precipitation in January, humidity remains constant at 86% in both months. For more detailed information about January weather, you can refer to this link: Mount Shasta weather in January.
December and February showcase distinct yet comparable weather patterns. In December, temperatures typically range from a minimum of -10°C (14°F) to a maximum of 17°C (63°F), with an average of around 1°C (34°F). The month experiences significant precipitation, totaling 153 mm (6.0 in) over 12 days, and maintains high humidity at 86%. In contrast, February is slightly colder with a minimum temperature of -13°C (8°F) and a maximum of 18°C (64°F), an average of 2°C (36°F). This month sees increased precipitation, totaling 218 mm (8.6 in) over 11 days, and slightly higher humidity at 87%. For a detailed insight into February weather, you can check Mount Shasta weather in February.
In December, temperatures in Mount Shasta typically range from a minimum of -10°C (14°F) to a maximum of 17°C (63°F), with an average temperature of 1°C (34°F). The month experiences considerable precipitation, totaling 153 mm (6.0 in) over about 12 days, maintaining a high humidity level of 86%. In contrast, March sees a slight increase in average temperatures, with minimums dropping to -15°C (6°F) and maximums reaching 20°C (68°F), resulting in an average of 3°C (38°F). However, March is marked by even higher precipitation, averaging 204 mm (8.0 in) spread over 16 days, while humidity remains constant at 86%. For more detailed information, you can check Mount Shasta weather in March.
December and April present contrasting weather patterns. In December, temperatures can drop as low as -10°C (14°F), with an average of 1°C (34°F) and highs reaching 17°C (63°F), alongside considerable precipitation of 153 mm (6.0 in) spread over 12 days. The humidity is notably high at 86%. In contrast, April brings milder temperatures, ranging from a minimum of -6°C (22°F) to an average of 7°C (45°F), with maximum temperatures hitting 25°C (77°F). While April sees slightly less precipitation at 121 mm (4.8 in) over 10 days, the humidity is still relatively high at 83%. For more details, you can check out Mount Shasta weather in April.
December and May exhibit significantly contrasting weather patterns. December typically experiences chilly temperatures, with a minimum of -10°C (14°F) and an average around 1°C (34°F), while May brings a much milder climate, where temperatures range from a minimum of -5°C (24°F) to a comfortable average of 12°C (54°F). Precipitation also differs noticeably, as December receives 153 mm (6.0 in) of rain over an average of 12 days, compared to May's 87 mm (3.4 in) over just 9 days. Additionally, humidity levels are higher in December at 86%, versus 72% in May, accentuating the latter's more pleasant spring-like atmosphere. For more detailed information, check out Mount Shasta weather in May.
December and June present starkly contrasting weather conditions. In December, temperatures can plummet as low as -10°C (14°F), with an average of around 1°C (34°F) and a maximum reaching 17°C (63°F). This month also experiences high humidity at 86% and considerable precipitation, totaling 153 mm (6.0 in) over 12 days. In contrast, June offers a much warmer climate, with minimum temperatures starting at 0°C (32°F) and averages soaring to 18°C (64°F), while highs can reach a sweltering 35°C (96°F). Rainfall is minimal in June, with only 27 mm (1.1 in) expected over just 4 days, and humidity drops to a more comfortable 67%. For more details, refer to Mount Shasta weather in June.
December and July exhibit stark contrasts in weather. December brings chilly temperatures, with lows plummeting to -10°C (14°F) and average highs only reaching around 1°C (34°F), alongside significant precipitation of 153 mm (6.0 in) over approximately 12 days, leading to a damp and humid atmosphere with an 86% humidity level. In contrast, July warms up considerably, featuring milder temperatures that range from a minimum of 8°C (47°F) to an average high of 23°C (73°F), and even peaking at a scorching 37°C (99°F). Rain is scarce during this summer month, with just 5 mm (0.2 in) of precipitation over a mere 1 day, and a more comfortable humidity level of 56%. For a closer look at the July weather in this region, check out Mount Shasta weather in July.
December and August present stark contrasts in weather conditions. December experiences much colder temperatures, with lows averaging -10°C (14°F) and highs reaching 17°C (63°F), while August boasts a much warmer climate, with temperatures ranging from 7°C (44°F) to a scorching maximum of 37°C (98°F). Precipitation levels also vary significantly; December is notably wetter with 153 mm (6.0 in) over 12 days, compared to August's dry conditions, which see only 9 mm (0.4 in) of rain over just 2 days. Furthermore, December's humidity is high at 86%, while August offers a far more comfortable humidity level of 42%. For more details about August weather, check out Mount Shasta weather in August.
The weather in December presents a stark contrast to that of September. In December, temperatures can dip to a minimum of -10°C (14°F) and average around 1°C (34°F), showcasing the chill of winter. In contrast, September boasts much milder conditions, with minimum temperatures around -1°C (30°F) and an average high reaching 17°C (63°F). Additionally, December experiences significantly more precipitation, with 153 mm (6.0 in) over approximately 12 days, compared to just 23 mm (0.9 in) over 4 days in September. This results in higher humidity in December at 86%, compared to a drier 46% in September. For those interested in the specifics of September's climate, you can find more information at Mount Shasta weather in September.
In December, the weather in Mount Shasta is significantly colder and wetter compared to October. December temperatures range from a minimum of -10°C (14°F) to a maximum of 17°C (63°F), with an average of just 1°C (34°F). Additionally, December sees an average precipitation of 153 mm (6.0 in) over approximately 12 days, accompanied by high humidity levels of 86%. In contrast, October features milder weather with temperatures ranging from a minimum of -4°C (25°F) to a warm maximum of 31°C (87°F), resulting in an average of 10°C (51°F). The month experiences less precipitation, totaling 76 mm (3.0 in) over just 5 days, and a relative humidity of 67%. For detailed insights, you can check Mount Shasta weather in October.
In comparing the weather of December to November, December tends to be milder overall, with an average temperature of 1°C (34°F) compared to November's average of 5°C (42°F). However, December experiences slightly higher maximum temperatures, peaking at 17°C (63°F) versus November’s 23°C (73°F). Precipitation also increases in December, with 153 mm (6.0 in) falling over 12 days, compared to November's 128 mm (5.1 in) over 9 days. Despite both months exhibiting high humidity at 86%, December's conditions suggest a wetter, albeit milder, end to the year. For a more detailed look at November weather patterns, you can visit Mount Shasta weather in November.
December in Mount Shasta presents a captivating contrast to the milder months, embracing cold temperatures and considerable precipitation. As winter takes hold, the average temperature drops, creating a chill that can plunge to below freezing at night. The increased humidity levels and frequent precipitation highlight the onset of the snowy season, with December experiencing about 12 days of rain or snow. This festive transition not only enhances the picturesque landscape but also invites outdoor enthusiasts to enjoy winter activities. To learn more about what weather patterns to expect throughout the year, visit Mount Shasta Climate.