December Weather in Grand Canyon, United States

Last updated: February 24, 2025

In December, the Grand Canyon experiences a striking contrast in temperatures, with maximums reaching 18°C (64°F) and minimums plummeting to a chilly -16°C (4°F). The average temperature hovers around 3°C (37°F), creating a crisp atmosphere ideal for exploration. Visitors can expect approximately 33 mm (1.3 in) of precipitation over 6 days, often accompanied by high humidity levels averaging 82%, adding to the season's wintry charm. This unique blend of conditions makes December an excellent time for those seeking a quieter, more reflective experience amid the canyon's breathtaking landscapes.

December Temperature in Grand Canyon

In December, the Grand Canyon experiences a notable chill, with temperatures reflecting the onset of winter. The average temperature hovers around 3°C (37°F), while nighttime can plunge to a brisk -16°C (4°F), reminding visitors of the region's stark seasonal changes. Daytime temperatures reach a more moderate high of 18°C (64°F), offering a brief respite from the cold. Interestingly, as the year winds down, temperatures tend to gradually dip lower compared to the preceding months, highlighting a clear trend of cooling from the relatively mild conditions experienced in November. This transitional period not only showcases the beauty of the canyon adorned in winter's embrace but also invites adventurers to experience its serene landscapes under the crisp December sky.

December Weather in Grand Canyon: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Grand Canyon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec353845566376797871564737
Data source: Temperature data for Grand Canyon 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 Grand Canyon

In December, the Grand Canyon experiences a notable increase in precipitation, receiving 33 mm (1.3 in) over 6 days. This marks a contrast to the drier summer months of June and July, which see significantly lower totals with June recording almost no rainfall. As autumn transitions into winter, December's precipitation suggests a return to wetter conditions, bridging the gap between warmer and colder seasons. The slight uptick from November’s rainfall of 19 mm (0.8 in) signals a gradual onset of winter weather, providing the canyon's stunning landscapes with vital moisture and contributing to the dynamic ecosystem. With winter just around the corner, December's weather sets the stage for the seasonal transformations that define this breathtaking national treasure.

December Precipitation Trends in Grand Canyon

The chart displays monthly precipitation patterns in Grand Canyon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec40434813183251514231933
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Grand Canyon

As December arrives in the Grand Canyon, humidity levels tend to rise once again, resting at 82%. This increase follows a gradual decline from the dry summer months of June and July, where readings dipped to their lowest at 35% and 33% respectively. As fall settles in, humidity starts creeping upward, peaking in the crisp chill of December, comparable to the higher levels seen at the beginning of the year in January (80%) and February (83%). This seasonal ebb and flow highlights a distinct trend, where the air grows more humid in winter months, providing a refreshing contrast to the arid heat of summer, ultimately enriching the Grand Canyon’s breathtaking landscape during the cooler season.

December Average Humidity in Grand Canyon

This chart illustrates the average monthly humidity levels in Grand Canyon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%72%63%46%35%33%41%59%70%79%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Grand Canyon

As December rolls into the Grand Canyon, tourists can expect a moderate UV Index of 4, similar to January. With a burn time of 30 minutes, it's a good reminder to practice sun safety, even in the cooler months. The UV levels in December stand in stark contrast to the extreme highs experienced from late spring through summer, where indices peaked at 12. This seasonal trend highlights the importance of adjusting your sun protection strategies throughout the year. Whether you're hiking along the canyon rim or enjoying scenic views, being aware of the UV Index is vital. For more information and to plan your visit safely, check out the Grand Canyon UV Index.

Maximum UV Index Levels in Grand Canyon for December

The chart shows the monthly maximum UV Index (UVI) for Grand Canyon 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.
JanFebMarAprMayJunJulAugSepOctNovDec479111212121110854
Data source: Grand Canyon 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 Grand Canyon

As December settles over the Grand Canyon, the days begin to shorten, bringing a gentle shift in sunshine hours. With 230 hours of sunlight, this month marks a decrease from the vibrant brightness of fall, yet still offers visitors a chance to marvel at the canyon's stunning vistas bathed in soft winter light. The gradual decline from the sun-drenched highs of May and June, which boast over 370 hours of radiant sunshine, transitions through the autumn months, offering a tapestry of changing colors and cooler temperatures. Though December is among the quieter months, it provides an opportunity to experience the canyon's breathtaking beauty under a serene, sunlit sky that is both inviting and tranquil. As the year draws to a close, the shifting patterns of sunlight remind us of nature's rhythmic dance, highlighting the canyon's allure even in its more subdued moments.

Monthly Sunshine Duration in Grand Canyon: December Highlighted

The December sunshine duration represents the total number of hours Grand Canyon 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.
JanFebMarAprMayJunJulAugSepOctNovDec181h235h294h330h373h379h371h356h321h294h258h230h
Data source: Grand Canyon December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Grand Canyon During December

In December, the likelihood of sunny weather in the Grand Canyon drops to 51%, making it one of the cloudier months of the year. This reflects a broader trend where the chances of sunshine tend to be lower during the winter months. Comparatively, this rate stands in contrast to the sunnier spring and summer seasons, with May peaking at 79% and April not far behind at 74%. As the year progresses towards winter, the overall propensity for sunny days diminishes, creating a cozy, yet often cloudy atmosphere for visitors seeking the beauty of the canyon's winter landscape. Thus, while December may not promise the abundant sunshine of earlier months, it offers a unique charm that is well worth experiencing.

Percentage of Sunny Days in December in Grand Canyon

The chart illustrates the percentage of sunny days in Grand Canyon 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 Grand Canyon experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec53%72%64%74%79%70%43%69%77%68%74%51%
Data source: Grand Canyon December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Grand Canyon in December

As December rolls into the Grand Canyon, daylight dwindles to just 9 hours, marking the shortest days of the year. This decline begins subtly after the peak of 14 hours in June through July, as the sun slowly retreats from its summer zenith. Following the vibrant spring months of April and May, which boast 13 and 14 hours of daylight respectively, the transition into autumn brings a gradual tapering, with daylight slipping to 11 hours in October and further down to 10 hours by November. December's limited sunlight invites a cozy charm to the majestic canyon, setting the stage for stunning sunrises and sunsets amidst the serene winter landscape. As the days grow shorter, nature presents a different kind of beauty, emphasizing the captivating contrast of the seasons.

Average Daylight Hours in Grand Canyon for December

The chart illustrates the variation in daylight duration in Grand Canyon throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h10h 52m11h 59m13h 7m14h 5m14h 33m14h 17m13h 26m12h 21m11h 13m10h 14m9h 44m
Data source: Grand Canyon daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Grand Canyon

In December, the Grand Canyon experiences a gentle resurgence in wind speed, averaging 2.8 m/s (6 mph). This marks a slight increase from the more tranquil breeze of November, which also recorded 2.3 m/s (5 mph). Interestingly, the year starts with minimal winds in January, but as we move into the spring months, wind speeds gradually rise, peaking in March and April at 3.1 m/s (7 mph) and 3.3 m/s (7 mph) respectively. Following the warmer summer months, where winds dip to their lowest in July at just 2.1 m/s (5 mph), December offers a refreshing balance as it transitions back to a steadier breeze, hinting at the changing seasons ahead. This subtle variability underscores the unique climatic patterns that define the Grand Canyon throughout the year.

Average December Wind Speed in Grand Canyon

The chart displays monthly wind speed patterns in Grand Canyon, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.32.63.13.33.32.92.12.62.22.82.32.8 m/s
Data source: Grand Canyon December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Grand Canyon Compares to Other Months

The weather in Grand Canyon 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 Grand Canyon and find detailed weather information for every month.

December and January showcase a gradual transition in weather patterns. In December, temperatures range from a chilly minimum of -16°C (4°F) to a relatively mild maximum of 18°C (64°F), with an average temperature of 3°C (37°F). Precipitation during this month is measured at 33 mm (1.3 in) over six days, with humidity levels at 82%. In contrast, January sees a slight dip in temperature, with a minimum of -17°C (2°F) and a maximum of 17°C (63°F), averaging 2°C (36°F). Precipitation increases to 40 mm (1.6 in) across the same six days, while humidity remains slightly lower at 80%. For those interested in exploring more about winter weather conditions, check out Grand Canyon weather in January.

December and February both experience similar temperature ranges, with minimums around -16°C (4°F) and average temperatures close to 3°C (37°F). However, February sees slightly warmer maximum temperatures, reaching up to 19°C (66°F) compared to December's maximum of 18°C (64°F). Precipitation increases in February, averaging 43 mm (1.7 in) over 7 days, while December has 33 mm (1.3 in) over 6 days. Humidity levels are also comparable, with December at 82% and February at 83%. For those interested in specific weather patterns, trends, or activities, it's worth checking out Grand Canyon weather in February.

December and March present contrasting weather patterns, despite their proximity in the winter-to-spring transition. In December, temperatures typically range from a chilly minimum of -16°C (4°F) to a mild maximum of 18°C (64°F), with an average of around 3°C (37°F). The month experiences relatively low precipitation at 33 mm (1.3 in) over about 6 days, coupled with a high humidity level of 82%. Conversely, March offers a more temperate climate, with minimum temperatures around -14°C (7°F) and maximums reaching up to 25°C (78°F), averaging 7°C (45°F). Precipitation increases to 48 mm (1.9 in) over approximately 8 days, but humidity decreases to a more comfortable 72%. For more specific insights into March weather conditions in the Grand Canyon, you can refer to Grand Canyon weather in March.

December and April weather present a striking contrast in temperature and humidity. In December, temperatures can drop to a chilly minimum of -16°C (4°F), with an average of 3°C (37°F) and a maximum reaching 18°C (64°F). The month sees significant humidity at 82% and experiences approximately 33 mm (1.3 in) of precipitation over six days. In contrast, April offers a milder climate, where temperatures range from a minimum of -3°C (27°F) to a comfortable average of 13°C (56°F), peaking at 30°C (87°F). With only 13 mm (0.5 in) of precipitation over two days and lower humidity at 63%, April provides a much drier and warmer experience. For more insights into the weather during this vibrant spring month, check out Grand Canyon weather in April.

The weather in December is characterized by much colder temperatures, with a minimum reaching as low as -16°C (4°F) and an average of only 3°C (37°F). In contrast, May brings warmer conditions, with average temperatures climbing to 17°C (64°F) and maximums even soaring to 34°C (93°F). December also experiences higher humidity levels at 82% and more precipitation, with rain occurring on about 6 days, while May enjoys a drier climate with only 18 mm (0.7 in) of precipitation over just 3 days. For more details on the pleasant weather during May, you can check out Grand Canyon weather in May.

The weather in December is characterized by cold temperatures, with a minimum of -16°C (4°F) and an average of 3°C (37°F), occasionally reaching a maximum of 18°C (64°F). This month also experiences higher humidity at 82% and receives about 33 mm (1.3 in) of precipitation over approximately six days. In contrast, June presents a much warmer climate, with temperatures ranging from a minimum of 7°C (45°F) to a scorching maximum of 38°C (102°F), and an average temperature of 24°C (76°F). June boasts significantly lower humidity at 35% and minimal precipitation, with just 3 mm (0.1 in) recorded over zero days. For more information on the June weather, you can visit Grand Canyon weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures can dip as low as -16°C (4°F), with an average of 3°C (37°F) and a maximum of 18°C (64°F). This month typically sees about 33 mm (1.3 in) of precipitation over six days, with high humidity at 82%. In contrast, July enjoys much warmer temperatures, ranging from a minimum of 13°C (56°F) to a sweltering maximum of 40°C (105°F), with an average of 26°C (80°F). Precipitation is lighter in July, totaling around 24 mm (1.0 in) over seven days, but the humidity is significantly lower at 33%. For more information, you can check Grand Canyon weather in July.

December and August present contrasting weather conditions. In December, temperatures range significantly from a minimum of -16°C (4°F) to a maximum of 18°C (64°F), with an average of 3°C (37°F), creating a chilly atmosphere. The month sees precipitation on about 6 days, totaling 33 mm (1.3 in), and high humidity at 82%. In stark contrast, August experiences much warmer temperatures, with a minimum of 13°C (56°F) and soaring to a maximum of 38°C (100°F), averaging around 26°C (79°F). Precipitation is minimal, occurring only 3 days and amounting to 15 mm (0.6 in), coupled with significantly lower humidity at 41%. For more detailed information on August weather, visit Grand Canyon weather in August.

December weather is characterized by much colder temperatures, with a minimum of -16°C (4°F) and an average of 3°C (37°F), while September enjoys milder conditions, ranging from a minimum of 3°C (37°F) to a comfortable average of 22°C (71°F). The maximum temperature in September can soar to 37°C (100°F), highlighting a significant contrast to December's maximum of 18°C (64°F). Additionally, December experiences higher humidity at 82% and more frequent precipitation, with rain on about six days, compared to September's lighter rainfall of just 14 mm (0.5 in) over three days. For more insights into the pleasant conditions of September, you can check Grand Canyon weather in September.

December's weather is distinctly colder than October's, with temperatures ranging from a frigid minimum of -16°C (4°F) to a more temperate maximum of 18°C (64°F), while October enjoys a milder range from -6°C (22°F) to a warm 30°C (86°F). Precipitation in December is slightly higher at 33 mm (1.3 in) over 6 days compared to October's 23 mm (0.9 in) over just 4 days. Additionally, December's humidity is notably higher at 82% compared to October's 70%, contributing to a more crisp and damp atmosphere. For more detailed insights about the weather, you can check out Grand Canyon weather in October.

In comparing the weather between November and December, December tends to be colder, with temperatures ranging from a minimum of -16°C (4°F) to a maximum of 18°C (64°F) and an average of 3°C (37°F). In contrast, November showcases milder conditions, with temperatures ranging from a minimum of -8°C (17°F) to a maximum of 23°C (74°F), averaging at 8°C (47°F). Additionally, December experiences more precipitation, totaling 33 mm (1.3 in) over 6 days, whereas November sees less with 19 mm (0.8 in) across just 2 days. Humidity levels remain relatively high in both months, with December at 82% and November slightly lower at 79%. For those interested in more details about November's conditions, they can explore Grand Canyon weather in November.

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Conclusion: What to Expect From December Weather in Grand Canyon

As December unfolds at the Grand Canyon, visitors can expect a cooler and moister climate compared to the warmer months. With temperatures varying from a chilly -16°C (4°F) at night to a pleasant 18°C (64°F) during the day, layers become essential for comfort. The overall humidity hovers around 82%, contributing to a unique atmosphere, while precipitation is limited to about 6 days throughout the month. This contrasts with the drier, warmer conditions found in other seasonal months, making December a time of tranquil beauty at the canyon. To learn more about the region's varying conditions throughout the year, visit Grand Canyon Climate.