Last updated: August 27, 2025
December in Riehen, Switzerland offers a seasonal chill with maximum temperatures reaching 14°C (58°F) and an average of 3°C (38°F)*. As winter sets in, the minimum temperature can dip to a brisk -5°C (24°F), making warm attire essential for outdoor activities. The month is characterized by significant moisture, with an average precipitation amount of 124 mm (4.9 in) over 18 days of rain, contributing to an overall humidity level of 90%. This festive period transforms Riehen into a picturesque winter wonderland, where the blend of cool temperatures and lush greenery creates a captivating atmosphere.
In December, Riehen, Switzerland, embraces the heart of winter with temperatures that typically range from a minimum of -5°C (24°F) to a mild maximum of 14°C (58°F). As the year winds down, the average temperature hovers around 3°C (38°F), reflecting a steady drop as the region transitions from the autumn chill of November. This month showcases a notable decline in warmth compared to previous months, with a prominent shift away from the lingering mildness of the fall, and serves as a harbinger of the colder, frostier days ahead. While the crisp air may call for extra layers, the festive spirit and scenic winter landscapes make Riehen a captivating destination in December.
In December, Riehen, Switzerland, experiences a notable uptick in precipitation, with a total of 124 mm (4.9 in) falling over 18 days. This marks one of the highest monthly totals for the year, following the wetter months of May and July. The frequent rainfall contributes to a somewhat bleak yet atmospheric wintry landscape, contrasting with the crisp chill in the air. Interestingly, December stands out not only for its substantial amounts of rain but also for the increase in precipitation days, highlighting a shift towards more persistent and consistent moisture as the year draws to a close. As winter sets in, this increased precipitation is essential for replenishing local water sources, setting the stage for a lush spring ahead.
In Riehen, Switzerland, December ushers in a notable weather pattern, with humidity levels rising to 90%, a figure that aligns closely with the 90% seen in October. This increase marks the start of winter, contributing to a consistent trend where humidity remains predominantly high during the colder months. As the year progresses, humidity levels generally begin to taper off from spring's 84% peak, descending to a low of 80% in May and August. However, as colder months approach, the atmosphere becomes progressively more humid again, particularly as we transition from late autumn into winter. With December's humidity reminiscent of early winter’s values, Riehen's climate clearly showcases the cyclical nature of atmospheric moisture throughout the year.
In December, Riehen, Switzerland experiences a very low UV Index of 1, indicating minimal sun exposure risk and a burn time of 45 minutes. As the year progresses from January's low index of 2 to a peak of 9 in the height of summer, a clear trend emerges: UV exposure intensifies with the changing seasons. By December, sunshine diminishes, leading to safer outdoor conditions. This serves as a reminder that during this winter month, while UV protection isn’t a top priority, it’s still wise to stay informed. For a detailed outlook throughout the year, visit Riehen UV Index.
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In Riehen, Switzerland, December brings a delightful farewell to the year with 156 hours of sunshine. While this is a dip from the vibrant months of summer—where June and July bask in over 389 and 413 hours of sunlight respectively—the last month of the year still offers a cozy ambiance. As the days grow shorter, there’s a noticeable transition from the brightness of May's 361 hours through to the mellow light of November, which captures only 192 hours. December's sunny moments are a charming reminder of the warmth that will return, contrasting beautifully with the crisp winter air and setting the stage for a refreshing start to the new year.
In Riehen, Switzerland, December presents a modest 26% chance of sunny weather, making it one of the cloudier months of the year. As the year progresses from the bright beginnings of March, where the likelihood of sunshine peaks at 47%, the chances gradually decline into the late year. Notably, the weather in December is sunnier than in November, which has only a 23% chance of sunshine, yet still lags behind the sunnier months of spring and early autumn. This trend suggests that while December may not offer abundance in sunlight, it does hint at a slight improvement compared to the preceding month, encouraging optimism for those looking to embrace any winter rays that might break through.
In Riehen, Switzerland, the daylight duration gracefully shifts throughout the year, revealing a distinct seasonal rhythm. The year begins with a modest 8 hours of daylight in January, which gradually increases to a vibrant 15 hours by May, showcasing the allure of spring's arrival. This peak daylight continues through June and July, before gently waning as summer transitions into autumn. By September, daylight starts to recede with 12 hours, and the decline continues until December, where the cycle returns to 8 hours. This fascinating interplay of light reflects not only the changing seasons but also the natural beauty of Riehen's enchanting landscapes.
In December, the winds in Riehen, Switzerland, pick up slightly, averaging 2.5 m/s (6 mph), mirroring the speeds of earlier winter months. Notably, this increase follows a slow dip during the summer, where the gentle breezes lingered around 1.7 to 1.9 m/s (4 mph) from June to October. As the year winds down, the higher December average suggests a shift toward more invigorating conditions, echoing the early winter’s crispness that many have come to cherish. Interestingly, the trend reveals how the peak summer calm transitions into a more refreshing atmosphere by year's end, providing the perfect backdrop for the festive season in this charming Swiss town.
Weather in Riehen varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Riehen, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit notable differences in weather patterns. In December, temperatures range from a minimum of -5°C (24°F) to a maximum of 14°C (58°F), with an average of 3°C (38°F). Precipitation is relatively high, totaling 124 mm (4.9 in) over 18 days, and humidity hovers around 90%. In contrast, January experiences colder temperatures, with a minimum of -13°C (8°F) and an average of 1°C (35°F), peaking at 17°C (62°F). Precipitation decreases to 89 mm (3.5 in) over 12 days, while humidity slightly rises to 92%. For more detailed information, you can check Riehen weather in January.
December weather is characterized by relatively mild temperatures, with an average of 3°C (38°F) and a maximum of 14°C (58°F), but it also experiences considerable precipitation, totaling 124 mm (4.9 in) over about 18 days, and high humidity at 90%. In contrast, February temperatures can drop significantly, featuring a minimum of -13°C (9°F) and an average of 4°C (39°F), although it can reach a maximum of 19°C (66°F). February also sees less rainfall, with only 75 mm (2.9 in) across 12 days and a similar humidity level of 89%. For more detailed information, visit Riehen weather in February.
December weather is characterized by colder temperatures, with a minimum reaching as low as -5°C (24°F) and an average of around 3°C (38°F). The month experiences significant precipitation, averaging 124 mm (4.9 in) over 18 days, and a high humidity level of 90%. By contrast, March shows a noticeable warming trend, with minimum temperatures dropping to -12°C (10°F) but an average rising to 6°C (44°F), and maximum temperatures reaching up to 21°C (71°F). Precipitation is lower in March at 87 mm (3.4 in) over 14 days, and humidity is slightly reduced to 87%. For more specific details about weather conditions during this month, you can visit Riehen weather in March.
December and April present distinct contrasts in weather patterns. December typically experiences colder temperatures, with minimums dipping to -5°C (24°F) and average highs around 3°C (38°F), while April sees a milder climate, boasting an average of 10°C (50°F) and maximums reaching up to 26°C (80°F). Additionally, December is marked by higher precipitation, with 124 mm (4.9 in) spread over 18 days, compared to April's 59 mm (2.3 in) over just 10 days. Humidity levels are also fairly high in December at 90%, compared to 84% in April. For more detailed information on April’s weather, you can check Riehen weather in April.
December and May offer starkly contrasting weather experiences. In December, temperatures average around 3°C (38°F), with lows plunging to -5°C (24°F) and highs reaching up to 14°C (58°F). The month is characterized by high humidity at 90% and significant precipitation, totaling 124 mm (4.9 in) over 18 days. In contrast, May sees a more welcoming climate, with average temperatures climbing to 14°C (57°F) and maximums soaring to 31°C (87°F). While May also experiences some rainfall, with 126 mm (5.0 in) spread over 17 days, the humidity drops to a more comfortable 80%. For a closer look at the weather in May, visit Riehen weather in May.
December and June present contrasting weather patterns, highlighting the stark differences between winter and summer. In December, temperatures range from a chilly -5°C (24°F) to a mild 14°C (58°F), with an average of 3°C (38°F). The month experiences significant precipitation of 124 mm (4.9 in) over 18 days, accompanied by high humidity levels of 90%. In contrast, June showcases much warmer conditions, with temperatures fluctuating between a minimum of 6°C (43°F) and a maximum of 34°C (94°F), averaging around 19°C (66°F). Precipitation is slightly lower at 120 mm (4.7 in) over just 16 days, and humidity drops to a more comfortable 82%. For a closer look at what to expect, you can check Riehen weather in June.
December and July present stark contrasts in weather. In December, temperatures range from a chilly -5°C (24°F) at night to a milder 14°C (58°F) during the day, with an average temperature of 3°C (38°F). The month is characterized by high humidity at 90% and substantial precipitation of 124 mm (4.9 in) over 18 days, creating a damp, wintry atmosphere. In contrast, July boasts much warmer temperatures, with nighttime lows of 9°C (49°F) and daytime highs soaring up to 36°C (98°F), averaging around 20°C (69°F). The precipitation in July is similar, at 122 mm (4.8 in), but it falls over just 15 days, and humidity is lower at 83%, resulting in a more comfortable summer environment. For a closer look at the warm summer conditions, check out Riehen weather in July.
When comparing the weather in December and August, the differences are quite striking. December typically sees much colder temperatures, with averages around 3°C (38°F) and nighttime lows dropping to -5°C (24°F). In contrast, August offers a warmer climate, with average temperatures soaring to 20°C (68°F) and highs reaching as much as 34°C (94°F). Additionally, December experiences higher humidity at 90% and more precipitation over 18 days (124 mm), while August has slightly lower humidity at 80% and a bit less rainfall over 15 days (115 mm). For those interested in the specifics of the August weather, you can find more details here: Riehen weather in August.
In December, the weather is significantly colder compared to September, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 14°C (58°F), and an average temperature of 3°C (38°F). The month experiences higher precipitation levels, totaling 124 mm (4.9 in) over 18 days, and a humidity of 90%. On the other hand, September enjoys milder conditions with temperatures ranging from 2°C (36°F) at night to a warm 30°C (86°F) during the day, averaging 16°C (61°F). This month also has less precipitation, at 69 mm (2.7 in) over 12 days and a lower humidity level of 83%. For more detailed information, you can check Riehen weather in September.
December weather is notably colder than October, with minimum temperatures dropping to -5°C (24°F) compared to October's milder -1°C (30°F). The average temperature in December is a chilly 3°C (38°F), significantly lower than October's comfortable 11°C (52°F). While both months experience high humidity levels of 90%, December sees increased precipitation, with 124 mm (4.9 in) over 18 days, compared to October's 89 mm (3.5 in) over 13 days. For a more detailed comparison, you can check Riehen weather in October.
In comparing the weather of December to November, we see a notable shift in temperature and precipitation. December experiences colder conditions with average temperatures ranging from a minimum of -5°C (24°F) to a maximum of 14°C (58°F), whereas November's temperatures are slightly warmer, with a minimum of -4°C (25°F) and a maximum of 21°C (70°F). Additionally, December is significantly wetter, receiving 124 mm (4.9 in) of precipitation over 18 days, in contrast to November's 73 mm (2.9 in) over just 12 days. Humidity levels are also higher in December at 90%, compared to November's 88%. For more detailed information on November weather, you can visit Riehen weather in November.
As December settles over Riehen, the weather presents a stark contrast to the milder months preceding it. The chill is palpable, with average temperatures dipping significantly, making it the coldest month of the year. Frequent precipitation adds to the winter ambiance, leading to damp and humid conditions that compel locals and visitors alike to bundle up. While December offers a festive charm with its cozy atmosphere, it requires a notable adjustment from the relatively mild weather experienced earlier in the year. For more insights into how Riehen's winter months compare throughout the year, visit Riehen Climate.