December Weather in Chamonix-Mont-Blanc, France

Last updated: February 26, 2025

In December, Chamonix-Mont-Blanc transforms into a winter wonderland, with temperatures ranging from a brisk maximum of 8°C (46°F) to chilling minimums of -23°C (-8°F), and an average of -6°C (22°F). As snow blankets the picturesque landscape, the region experiences 19 days of precipitation, accumulating a notable 295 mm (11.6 in), contributing to its reputation as a prime skiing destination. The air, saturated with 90% humidity, enhances the frosty atmosphere, making Chamonix a magical retreat for winter enthusiasts seeking adventure and breathtaking views.

December Temperature in Chamonix-Mont-Blanc

In December, Chamonix-Mont-Blanc transforms into a winter wonderland, with temperatures dipping significantly as the year draws to a close. The minimum temperature hovers around a frosty -23°C (-8°F), while the average sits at a chilly -6°C (22°F). Daytime highs reach a modest 8°C (46°F), offering a subtle respite from the cold. As winter fully sets in, December reflects the trend of dropping temperatures, particularly pronounced since November, and hints at the depths of winter to come. With each passing month, the cold deepens, making Chamonix a prime destination for snow lovers and adventurers seeking a glimpse of its breathtaking alpine scenery.

December Weather in Chamonix-Mont-Blanc: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Chamonix-Mont-Blanc, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec182630374454575649413022
Data source: Temperature data for Chamonix-Mont-Blanc generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Chamonix-Mont-Blanc

In Chamonix-Mont-Blanc, December is a month of significant precipitation, with an impressive 295 mm (11.6 in) recorded, making it one of the wettest times of the year. This surge in precipitation coincides with an increase in rainy days, totaling 19 days throughout the month. Compared to the preceding months, December notably eclipses November's precipitation and days, highlighting a definitive trend toward more intense winter conditions. As ski enthusiasts flock to the area, the abundant snowfall shapes both the landscape and the local winter sports scene, setting the stage for an enchanting holiday season amidst the mountains.

December Precipitation Trends in Chamonix-Mont-Blanc

The chart displays monthly precipitation patterns in Chamonix-Mont-Blanc, 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.
JanFebMarAprMayJunJulAugSepOctNovDec17114117584224167162149109133120295
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chamonix-Mont-Blanc

As winter deepens in Chamonix-Mont-Blanc, December brings with it a humidity level of 90%, closely mirroring the dampness of the preceding months. This elevated humidity is characteristic of the colder season, reflecting a slight increase from the 89% experienced in October. Throughout the year, a clear trend emerges: humidity gradually decreases from a peak of 91% in January, reaching its annual low of 63% in August. However, as temperatures drop again towards the end of the year, the humidity makes a notable return, creating that brisk, crisp mountain air typical for December. Such conditions not only enhance the charm of the winter landscape but also prepare the region for the forthcoming snow-capped peaks and festive atmosphere.

December Average Humidity in Chamonix-Mont-Blanc

This chart illustrates the average monthly humidity levels in Chamonix-Mont-Blanc, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%84%83%78%75%72%63%73%89%91%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chamonix-Mont-Blanc

As the year draws to a close, December in Chamonix-Mont-Blanc witnesses a significant shift in UV exposure, with the UV Index dipping to 2, categorizing it as low. This allows for a more leisurely outdoor experience, extending burn time to a comfortable 45 minutes. Contrasting sharply with the peak summer months, where the UV Index soared to a high of 10, December's reduced intensity reflects the seasonal trend of diminishing UV radiation. Understanding these fluctuations is crucial for anyone planning winter activities in the breathtaking alpine landscape. For more detailed information, you can check the Chamonix-Mont-Blanc UV Index.

Maximum UV Index Levels in Chamonix-Mont-Blanc for December

The chart shows the monthly maximum UV Index (UVI) for Chamonix-Mont-Blanc 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.
JanFebMarAprMayJunJulAugSepOctNovDec34789101097532
Data source: Chamonix-Mont-Blanc 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 Chamonix-Mont-Blanc

In Chamonix-Mont-Blanc, December brings a soft embrace of winter sun, with approximately 202 hours of sunshine lighting up the snow-draped scenery. While this is a dip from the brighter months of summer, it still offers a magical atmosphere as the landscape transforms beneath the glowing rays. As the year draws to a close, the trend shows a gradual decline in daylight hours from the sunniest months of June and July, which boast over 400 hours, to the cozy twilight of winter. December's charm lies in its crisp air and serene beauty, creating a perfect backdrop for winter sports and holiday festivities, reminding us that even in the colder months, sunshine can create a sense of warmth and joy.

Monthly Sunshine Duration in Chamonix-Mont-Blanc: December Highlighted

The December sunshine duration represents the total number of hours Chamonix-Mont-Blanc 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.
JanFebMarAprMayJunJulAugSepOctNovDec173h237h306h352h362h397h422h392h331h291h228h202h
Data source: Chamonix-Mont-Blanc December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Chamonix-Mont-Blanc During December

In December, Chamonix-Mont-Blanc enjoys a 40% chance of sunny weather, marking a slight uptick compared to the previous month. When we analyze the broader trends throughout the year, we find that winter months tend to have lower sunshine likelihoods compared to the burgeoning spring, where the chances consistently rise to about 44% in April and March. Interestingly, December stands out as a transitional month, offering better prospects than the typically gloomy November but still below the sunnier months of the late spring and summer. As winter descends, visitors can expect a charming blend of crisp alpine air and a chance to catch the sun, making Chamonix an enchanting destination even in the depths of winter.

Percentage of Sunny Days in December in Chamonix-Mont-Blanc

The chart illustrates the percentage of sunny days in Chamonix-Mont-Blanc 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 Chamonix-Mont-Blanc experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%38%44%44%26%29%33%37%30%45%38%40%
Data source: Chamonix-Mont-Blanc December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Chamonix-Mont-Blanc in December

In Chamonix-Mont-Blanc, December brings shorter daylight hours, with just 8 hours of light each day. This decline marks the seasonal contrast from the bustling summer months, where daylight peaks at 15 hours in June and July. As the year progresses from the bright days of April and May to the dimming light of winter, the trend is clear: daylight gradually diminishes as we approach the winter solstice. Interestingly, while the shorter days in November and December can bring a sense of coziness, it also sets the stage for the enchanting winter landscapes and thrilling ski adventures that define Chamonix's charm during the colder months.

Average Daylight Hours in Chamonix-Mont-Blanc for December

The chart illustrates the variation in daylight duration in Chamonix-Mont-Blanc throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 5m10h 21m11h 56m13h 33m14h 57m15h 39m15h 17m14h 3m12h 29m10h 52m9h 26m8h 42m
Data source: Chamonix-Mont-Blanc daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Chamonix-Mont-Blanc

In December, the winds in Chamonix-Mont-Blanc begin to pick up slightly, with an average speed of 1.5 m/s (3 mph), marking a gentle increase compared to the preceding months. The trend over the year typically shows that wind speeds remain relatively stable, oscillating between 1.0 to 1.4 m/s, but December stands out as a time when the chill of winter begins to assert itself. Although the speed is modest by most standards, this slight uptick hints at the transformations in weather that accompany the onset of winter, setting the stage for the thrilling adventures that draw visitors to this breathtaking Alpine destination. This breezy environment, coupled with the stunning landscapes, creates a magical ambiance that captivates both adventurers and peace-seekers alike.

Average December Wind Speed in Chamonix-Mont-Blanc

The chart displays monthly wind speed patterns in Chamonix-Mont-Blanc, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.31.41.21.21.31.11.11.21.01.31.31.5 m/s
Data source: Chamonix-Mont-Blanc December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Chamonix-Mont-Blanc Compares to Other Months

The weather in Chamonix-Mont-Blanc 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 Chamonix-Mont-Blanc and find detailed weather information for every month.

In December, temperatures in Chamonix-Mont-Blanc range from a minimum of -23°C (-8°F) to a maximum of 8°C (46°F), with an average temperature of -6°C (22°F). The month experiences significant precipitation, totaling 295 mm (11.6 in) over 19 days, accompanied by a humidity level of 90%. In contrast, January sees slightly cooler temperatures, with a minimum of -25°C (-13°F) and a maximum of 6°C (44°F), yielding an average of -8°C (19°F). Precipitation decreases to 171 mm (6.7 in) across just 10 days, and the humidity rises slightly to 91%. For a closer look at January's weather, you can explore this link: Chamonix-Mont-Blanc weather in January.

The weather in December is notably colder than in February, with average temperatures hovering around -6°C (22°F) compared to February's milder -4°C (26°F). December experiences a lower maximum temperature, reaching only 8°C (46°F), while February can go as high as 11°C (52°F). Additionally, December sees significantly more precipitation with 295 mm (11.6 in) falling over 19 days, whereas February receives only 141 mm (5.5 in) across 11 days. Despite the slight decrease in humidity from December's 90% to February's 87%, both months maintain a high level of dampness typical of winter conditions. For a detailed look at the weather specifics, check out Chamonix-Mont-Blanc weather in February.

In December, the weather tends to be colder, with average temperatures around -6°C (22°F) and a maximum of 8°C (46°F), while March sees a slight warming trend with averages at -1°C (31°F) and highs reaching 14°C (58°F). December experiences more precipitation, totaling 295 mm (11.6 in) over approximately 19 days, compared to March's 175 mm (6.9 in) across 15 days. Additionally, humidity is slightly higher in December at 90%, compared to 84% in March. For a detailed look at the weather trends, check out Chamonix-Mont-Blanc weather in March.

December and April present a striking contrast in weather conditions. December is characterized by frigid temperatures, with an average around -6°C (22°F) and nighttime lows plummeting to -23°C (-8°F). It also experiences significant precipitation, totaling 295 mm (11.6 in) over 19 days, and maintains a high humidity level of 90%. In contrast, April sees a notable warming trend, with average temperatures rising to 3°C (38°F) and daytime highs reaching up to 17°C (63°F). Precipitation drops significantly to 84 mm (3.3 in) across 13 days, and humidity lessens to 83%. For more detailed insights into the weather during this month, you can refer to Chamonix-Mont-Blanc weather in April.

December and May present quite contrasting weather conditions. In December, temperatures can plummet to a minimum of -23°C (-8°F), with an average temperature around -6°C (22°F) and a maximum reaching 8°C (46°F). The month is characterized by high humidity at 90% and significant precipitation, totaling 295 mm (11.6 in) over 19 days. In stark contrast, May offers a milder climate, with minimum temperatures of -12°C (11°F), an average of 7°C (45°F), and a maximum that can rise to 23°C (74°F). Although precipitation remains high at 224 mm (8.8 in), it occurs over 21 days and the humidity drops to a more comfortable 78%. For a detailed look at the weather in May, you can visit Chamonix-Mont-Blanc weather in May.

When comparing December and June weather, it's striking how different the two months are. December features much colder temperatures, with averages around -6°C (22°F) and nighttime lows plunging to -23°C (-8°F), while June enjoys a milder climate, averaging 12°C (54°F) and peaking at a comfortable 28°C (83°F). Precipitation is more abundant in December, with 295 mm (11.6 in) over 19 days, compared to June's 167 mm (6.6 in) across 20 days. Additionally, December's humidity is significantly higher at 90%, whereas June has a more manageable 75%. For those interested in the specific weather conditions in June, you can find more information here: Chamonix-Mont-Blanc weather in June.

December and July present stark contrasts in weather, showcasing the dramatic seasonal shifts. In December, temperatures can plunge to a minimum of -23°C (-8°F), with an average of -6°C (22°F) and a maximum of 8°C (46°F). The month is characterized by high humidity at 90% and considerable precipitation, averaging 295 mm (11.6 in) over 19 days. In contrast, July boasts a much milder climate, with temperatures ranging from a minimum of 2°C (36°F) to an average of 14°C (57°F) and reaching a maximum of 27°C (81°F). Additionally, July experiences less precipitation, totaling 162 mm (6.4 in) across 18 days and a lower humidity level of 72%. For those interested in exploring July weather specifics, visit Chamonix-Mont-Blanc weather in July.

December and August present starkly contrasting weather in Chamonix-Mont-Blanc. In December, temperatures drop to a chilling minimum of -23°C (-8°F), with average highs only reaching 8°C (46°F) and substantial precipitation of 295 mm (11.6 in) over 19 days, accompanied by high humidity at 90%. In contrast, August offers much milder conditions, with temperatures ranging from a minimum of 2°C (36°F) to a comfortable maximum of 25°C (77°F), and lower precipitation at 149 mm (5.9 in) across 17 days, along with a humidity level of 63%. For more details on the weather during this summer month, you can check Chamonix-Mont-Blanc weather in August.

When comparing the weather in December and September, the differences are striking. December typically experiences much colder temperatures, with average highs around 8°C (46°F) and lows plunging to -23°C (-8°F), while September enjoys milder conditions, ranging from an average low of -8°C (19°F) to a high of 21°C (71°F). Precipitation is considerably higher in December, with 295 mm (11.6 in) spread over 19 days, compared to September’s 109 mm (4.3 in) over 16 days, and the humidity is also noticeably higher in December at 90% versus 73% in September. For those interested in specifics about September weather, you can explore more here: Chamonix-Mont-Blanc weather in September.

In comparing the weather between December and October, December brings significantly colder temperatures, with average lows around -6°C (22°F) and occasional highs of 8°C (46°F), while October enjoys a milder range, with averages from -8°C (18°F) to a maximum of 18°C (65°F). Precipitation is notably higher in December, reaching 295 mm (11.6 in) over 19 days, compared to October’s 133 mm (5.3 in) across 13 days. Despite the chill, December's humidity remains high at 90%, similar to October’s humidity level of 89%. For those interested in October's specific conditions, you can find more detailed information here: Chamonix-Mont-Blanc weather in October.

In comparing the weather of December and November, December presents colder temperatures overall, with an average of -6°C (22°F) compared to November's -1°C (30°F). While both months experience high humidity levels of 90%, December sees a significant increase in precipitation, totaling 295 mm (11.6 in) over 19 days, in contrast to November's 120 mm (4.7 in) over just 13 days. The maximum temperatures in November reach as high as 15°C (60°F), which is substantially warmer than December's peak of 8°C (46°F). For a closer look at November's weather specifics, visit Chamonix-Mont-Blanc weather in November.

Compare Chamonix-Mont-Blanc's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Chamonix-Mont-Blanc

As December envelops Chamonix-Mont-Blanc, visitors can expect a striking contrast to other months, characterized by a significant drop in temperatures and an increase in precipitation. With chilly averages hovering around freezing, the landscape transitions into a winter wonderland, where each snowfall adds to the allure of this alpine paradise. The damp conditions, marked by higher humidity and numerous precipitation days, create a cozy atmosphere perfect for warm fires and après-ski relaxation. For those seeking to understand how Chamonix-Mont-Blanc's December weather shapes the overall experience, the nuances of each season come beautifully to life through its unique climate. Discover more about the seasonal transformations in this breathtaking locale by visiting Chamonix-Mont-Blanc Climate.