Last updated: August 27, 2025
December in Sierre, Switzerland presents a chilly embrace, where temperatures vary from a maximum of 7°C (45°F) to a biting minimum of -30°C (-22°F), averaging around -8°C (18°F). This month also sees significant precipitation, totaling 188 mm (7.4 in) over approximately 16 days. With humidity levels soaring at 91%, residents and visitors alike are greeted by a decidedly wintry atmosphere, making it an enchanting time to experience the snowy landscapes and festive charm of this picturesque alpine town.
In December, Sierre, Switzerland, experiences a significant drop in temperatures as winter fully settles in. With a stark minimum temperature of -30°C (-22°F), the chill permeates the air, and the stark contrast to the milder months is evident. The average hovers around -8°C (18°F), offering a cold yet crisp atmosphere that is perfect for winter sports and festive activities. Despite reaching a maximum of 7°C (45°F), which provides brief moments of mildness, the lingering cold reminds residents and visitors alike that they are deep in the heart of winter. This month serves as a transition from the colder spell seen in November, where temperatures lingered around -2°C (29°F) but did not plunge quite as low. December's frigid embrace encourages cozy indoor gatherings and the enchanting beauty of snow-covered landscapes, capturing the essence of a Swiss winter wonderland.
December in Sierre, Switzerland, marks a significant uptick in precipitation, with 188 mm (7.4 in) falling over the month—a notable increase compared to previous months. This escalation in rainfall coincides with 16 precipitation days, making December one of the wetter months of the year. Following the trend seen from May through November, where total precipitation fluctuated but generally remained below December's levels, this month showcases the onset of winter’s influence. The consistent increase in rainfall as the year closes highlights the region's transition into harsher weather conditions, creating a striking contrast with the drier spells earlier in the year.
In December, Sierre, Switzerland, experiences a notable return to high humidity levels, matching the 91% seen in January. This trend highlights an overall winter pattern in the region, where humidity tends to peak during the colder months. Following a gradual decline from 89% in November, the humidity dips in late autumn before rising again in the depth of winter. Interestingly, the seasonal shift reveals that the humidity peaks during both the beginning and end of the year, with a relative drop in summer months, where levels fall to as low as 77% in August. This cyclical pattern underscores Sierre's unique climate, marked by moist winters that contrast with the drier, sunnier days of summer.
As December rolls into Sierre, Switzerland, the UV Index drops to a low level of 2, marking a notable decrease from the preceding months when values peaked in the summer. This shift indicates that sun exposure is far less intense, allowing for up to 45 minutes of safe time in the sun without risk of burning. Following the higher UV Index readings of January (3) and February (4), which both maintained a moderate risk, December's milder conditions signal the onset of winter and a respite from the harsher sun. As you enjoy the winter landscape, remember to stay informed about UV levels with resources like Sierre UV Index, even during this cooler season.
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In December, Sierre, Switzerland enjoys a delightful 202 hours of sunshine, a notable continuation of the area's seasonal variation in daylight. As the year winds down, the sunlight begins its retreat after peaking in the glorious summer months, with July showcasing the highest count at 416 hours. Following this peak, the city experiences a gradual decline, yet December still offers a substantial amount of winter sunshine, contrasting with the earlier months of the year. The trend reflects the region’s charm during the colder months, where crisp, sunlit days invite both locals and visitors to embrace the festive spirit, even as the days grow shorter.
In Sierre, Switzerland, December experiences a 41% chance of sunny weather, marking a notable transition as the year approaches its end. While this likelihood is higher than the long dark winter months of January (22%) and February (40%), it also echoes a general trend seen in the earlier fall months, such as October (44%) and November (33%). Interestingly, the chance of sunshine tends to increase slightly during December compared to other winter months, hinting at a subtle optimism for clear skies amid the backdrop of snow-capped peaks. As the festive season approaches, residents and visitors alike can hope for those precious sunny days that brighten the winter landscape.
As the year winds down, December ushers in the shortest days in Sierre, Switzerland, with only 8 hours of daylight. This significant decrease follows the gradual decline from November's 9 hours, showcasing a clear trend of diminishing sunlight as winter approaches. Prior months, particularly the vibrant summer, dazzled residents with up to 15 hours of daylight in June and July. However, the transition into the winter months reflects a consistent pattern: from the bright 14 hours of May to the more subdued 11 hours of March, daylight steadily retreats, creating a cozy atmosphere perfect for enjoying the comforts of the season. The cycles of light and darkness highlight the unique charm of living in this picturesque Alpine region, as each month unfolds its own story.
In December, Sierre, Switzerland, experiences a steady winter wind, with an average speed of 1.4 m/s (3 mph), mirroring the gentle breezes of January and November. Throughout the year, wind speeds remain relatively low, fluctuating only slightly between 1.0 and 1.6 m/s. This calmness is particularly evident in the summer months, where the breeze dips to its lowest at an average of 1.0 m/s (2 mph) in June and September. While the winter months maintain a consistent, tranquil airflow, it’s January's and December's winds that subtly enhance the crisp alpine atmosphere, reminding residents and visitors alike of the serene beauty that winter bestows upon this charming Swiss town.
Weather in Sierre varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Sierre, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of December and January, both months experience extremely cold temperatures, with December having an average of -8°C (18°F) and January slightly colder at -9°C (16°F). December's minimum temperature can plunge to -30°C (-22°F), while January's low is a bit less severe at -27°C (-17°F). Precipitation is more frequent in December, occurring on about 16 days and totaling 188 mm (7.4 in), compared to January's 10 days of rain and only 135 mm (5.3 in). Notably, both months maintain a high humidity level of 91%, contributing to the chilly atmosphere. For more detailed information on January weather, refer to Sierre weather in January.
December and February exhibit distinct weather patterns, with both months showcasing cold temperatures but differing conditions. In December, temperatures can plunge to a minimum of -30°C (-22°F), while averaging around -8°C (18°F) and reaching a maximum of 7°C (45°F). The month is characterized by significant precipitation, totaling 188 mm (7.4 in) over 16 days and a high humidity level of 91%. In contrast, February features slightly milder temperatures, with a minimum of -23°C (-8°F) and an average of -5°C (23°F), reaching up to 11°C (52°F) at its warmest. Precipitation is also lower in February, amounting to 95 mm (3.8 in) over just 11 days, with humidity slightly lower at 89%. For a closer look at February weather specifics, you can visit Sierre weather in February.
In December, the weather is significantly chillier, with average temperatures hovering around -8°C (18°F) and reaching a maximum of 7°C (45°F). The month experiences a substantial amount of precipitation, totaling 188 mm (7.4 in) over 16 days, creating a humid environment with 91% humidity. In contrast, March brings a noticeable warming trend, with average temperatures rising to -2°C (29°F) and highs of 14°C (57°F). Precipitation decreases to 122 mm (4.8 in) over 15 days, accompanied by slightly lower humidity at 87%. For more details, check out Sierre weather in March.
December and April present stark contrasts in weather patterns. In December, temperatures can plunge to a chilling minimum of -30°C (-22°F), while the average sits at a frosty -8°C (18°F) and peaks at just 7°C (45°F). The month is characterized by high humidity at 91% and significant precipitation of 188 mm (7.4 in) over 16 days. In contrast, April brings a gradual warming trend, with temperatures ranging from a minimum of -17°C (1°F) to a comfortable maximum of 17°C (63°F), and an average of 3°C (37°F). The precipitation decreases to 81 mm (3.2 in) over 11 days, accompanied by slightly lower humidity at 84%. For more details on April weather, you can check Sierre weather in April.
In December, temperatures can plummet as low as -30°C (-22°F), with an average around -8°C (18°F) and a maximum reaching 7°C (45°F). This month sees heavy precipitation, totaling 188 mm (7.4 in), over about 16 days, coupled with high humidity at 91%. In contrast, May brings a noticeable warming trend, with temperatures ranging from a minimum of -16°C (4°F) to an average of 6°C (43°F) and maximums that can soar up to 22°C (72°F). Although May experiences slightly less precipitation at 160 mm (6.3 in) over 20 days, the humidity is lower at 80%. For a deeper look at the weather patterns in May, you can check Sierre weather in May.
December and June present contrasting weather experiences. In December, temperatures can plunge as low as -30°C (-22°F), with an average of -8°C (18°F) and a maximum reaching only 7°C (45°F). This winter month sees significant precipitation of 188 mm (7.4 in) over 16 days, accompanied by a high humidity level of 91%. In stark contrast, June boasts milder temperatures with a minimum of -4°C (25°F) and an average of 12°C (53°F), peaking at 27°C (81°F). Although June experiences slightly less precipitation at 130 mm (5.1 in), it still rains on about 16 days, with a somewhat lower humidity of 82%. For more details on June weather, you can visit Sierre weather in June.
December and July present strikingly contrasting weather conditions. In December, temperatures plunge to a minimum of -30°C (-22°F) and average around -8°C (18°F), while the maximum temperature barely reaches 7°C (45°F). This month also experiences significant precipitation, with 188 mm (7.4 in) falling over 16 days, coupled with high humidity levels of 91%. In contrast, July enjoys milder temperatures, with a minimum of 1°C (34°F), an average of 14°C (57°F), and a maximum reaching 28°C (82°F). Precipitation in July is lower, totaling 121 mm (4.8 in) over the same number of days, and humidity remains manageable at 82%. For a detailed look at what to expect in July, check out Sierre weather in July.
December weather is characterized by harsh, freezing temperatures, with averages ranging from a chilling -30°C (-22°F) as a minimum to a maximum of about 7°C (45°F). The month experiences significant precipitation, totaling 188 mm (7.4 in) over 16 days, along with high humidity at 91%. In contrast, August offers a milder climate, with temperatures ranging from a minimum of 1°C (34°F) to a more comfortable maximum of 26°C (80°F) and an average of 13°C (56°F). Though August also sees rain, the total precipitation is lower at 129 mm (5.1 in) over the same number of days, combined with a more comfortable humidity level of 77%. For a detailed look at the conditions during this summer month, you can visit Sierre weather in August.
December weather is characterized by much colder temperatures, with an average of -8°C (18°F) and occasional highs reaching only 7°C (45°F). This month sees significant precipitation, averaging 188 mm (7.4 in) over 16 days, and is marked by high humidity at 91%. In contrast, September offers a milder climate with temperatures ranging from a minimum of -5°C (23°F) to a pleasant maximum of 22°C (72°F). Precipitation is also lower, with 90 mm (3.6 in) spread over 12 days and humidity at a slightly lower 81%. For more details, check out Sierre weather in September.
In comparing the weather between December and October, it's clear that December is significantly colder, with average temperatures around -8°C (18°F) compared to October's milder average of 5°C (41°F). While October sees maximum temperatures reach up to 18°C (64°F), December only climbs to a maximum of 7°C (45°F). Precipitation is also more pronounced in December, with 188 mm (7.4 in) over 16 days, compared to October's 135 mm (5.3 in) over 13 days. Humidity levels are slightly higher in December at 91%, compared to October's 89%. For a more detailed look at October weather, check out this link: Sierre weather in October.
In comparing the weather between November and December, December is notably colder with average temperatures around -8°C (18°F), while November boasts a milder average of -2°C (29°F). The maximum temperatures in December reach only up to 7°C (45°F), compared to a higher maximum of 14°C (58°F) in November. Additionally, December experiences significantly more precipitation, totaling 188 mm (7.4 in) over 16 days, whereas November has a lower precipitation level of 98 mm (3.8 in) across 14 days. Humidity is slightly higher in December at 91%, compared to 89% in November. For a deeper look at November’s weather, you can explore Sierre weather in November.
December weather in Sierre brings a striking shift from the milder conditions of previous months, as its chilly temperatures and high humidity set the tone for winter. With average lows plunging and a considerable amount of precipitation, the month can feel particularly damp, with snow often blanketing the landscape. This transition not only invites festive cheer but also attracts winter sports enthusiasts eager to enjoy the snowy slopes. To learn more about how December fares in the overall climate context, explore Sierre Climate.