Last updated: January 18, 2025
Aargau, Switzerland, exhibits a Cfb climate classification, characterized by its temperate oceanic conditions. The region experiences a broad temperature range, with winter minima plummeting to -16°C (3°F) in January, while summer maxima can soar to 36°C (98°F) in July. Annually, the average temperature settles around 10°C (51°F), contributing to a dynamic ecosystem moderated by seasonal weather patterns and the influence of the surrounding topography.
Temperature patterns in Aargau, Switzerland, reveal distinct seasonal trends characterized by cold winters and warm summers. January marks the coldest month with minimum temperatures dropping to -16°C (3°F) and average highs reaching 17°C (62°F). As winter gradually gives way to spring, February and March see a slight increase in temperatures, culminating in April, where averages rise to 10°C (50°F) and maximums can reach 26°C (80°F). The transition to summer brings significantly warmer conditions: May boasts average temperatures of 13°C (56°F), while July and August peak around 36°C (98°F) and 35°C (95°F), respectively. As autumn approaches, temperatures begin to cool, with September still holding onto a warm average of 15°C (60°F) before descending into the more chilled conditions of October and November. By December, temperatures average 3°C (37°F), reflecting the cyclical shift in Aargau's climate as it oscillates between frigid winters and balmy summers.
Baden experiences a minimum temperature of -15°C (6°F) in January, rising to a maximum of 35°C (95°F) in July, making it a place of significant seasonal variation monthly temperatures in Baden. Similarly, Bremgarten has a minimum of -12°C (11°F) in February and a peak of 34°C (94°F) during the summer months, indicating a comparable climate monthly temperatures in Bremgarten. Lenzburg mirrors Baden's extremes with January lows of -15°C (6°F) and July highs of 35°C (95°F) monthly temperatures in Lenzburg.
Precipitation in Aargau, Switzerland, demonstrates a distinct seasonal pattern, with higher rainfall occurring during the summer months. January begins the year with 101 mm (4.0 in) of precipitation over approximately 11 days, while February experiences a slight decrease to 83 mm (3.3 in) across the same number of days. As spring unfolds, March showcases increased rainfall of 97 mm (3.8 in), followed by a dip in April to 68 mm (2.7 in). However, the onset of May signals a notable increase in precipitation, coinciding with the peak rainy summer months, where June and July both register 142 mm (5.6 in) and 145 mm (5.7 in), respectively.
The summer continues to be characterized by substantial precipitation, with August recording 148 mm (5.8 in) over 15 days, illustrating the region's moist conditions. As autumn approaches, September’s rainfall drops to 91 mm (3.6 in), while October brings a slight resurgence to 105 mm (4.1 in). November sees further decline to 73 mm (2.9 in), followed by December, which wraps up the year with 135 mm (5.3 in) and the highest precipitation days at 18. This seasonal variability underscores Aargau's climate, marked by distinct wet and dry periods that significantly influence the local atmosphere and ecosystem.
In Aargau, Switzerland, sunshine duration reveals a distinct seasonal trend, commencing with relatively low hours in winter and climbing to a peak during the summer months. January starts the year with just 153 hours of sunshine, which gradually increases through February to 221 hours. The arrival of spring ushers in a more pronounced rise, with March showcasing 293 hours and April seeing a significant jump to 357 hours. May continues this upward trajectory, reaching 366 hours, making it one of the sunniest months. However, it’s July that claims the title of the sunniest month in the year with 414 hours, embodying the peak of Aargau's summer.
As summer wanes into autumn, sunshine hours begin to decline, yet the decrease remains gradual. August still holds onto 382 hours, but by September, sunlight hours diminish to 322 hours. The decline continues through October with 274 hours and November, which sees a notable drop to 208 hours. By December, the region is left with only 173 hours of sunshine, reflecting the stark contrast between the abundant summer light and the shorter winter days. This seasonal variability in sunshine not only emphasizes Aargau's climatic shifts but also highlights the region's dependence on sunlight for agricultural activities and overall quality of life.
The UV Index in Aargau, Switzerland, demonstrates significant seasonal variation, reflecting the changing intensity of sunlight throughout the year. In winter, particularly in January, the UV Index is relatively low at 2, maintaining an "exposure category" of low, allowing for safe outdoor activities with a burn time of 45 minutes. As February transitions into early spring, the UV Index rises to 3, indicating moderate exposure levels. By March, the index continues its ascent to 5, suggesting increased sensitivity to UV radiation, which emphasizes the need for sun protection as residents prepare for brighter days ahead.
The summer months present the highest UV Index levels, peaking at 9 in both June and July, corresponding to a "very high" exposure category and a dangerously short burn time of just 15 minutes. August sees a slight decline to 8, yet still remains in the very high category, urging precautions for those enjoying outdoor activities. As autumn approaches, the UV Index shifts back down, with values of 6 in September and 4 in October, returning to moderate levels. The year comes full circle with the winter months—November and December—registering a low UV Index of 3 and 2, respectively, once again allowing for extended sun exposure but with a reminder of the protective measures necessary during the sunnier months.
UV Risk Categories
Daylight duration in Aargau, Switzerland, exhibits a stark seasonal fluctuation, beginning with the short days of winter. In January, residents experience only 8 hours of daylight, which gradually increases to 10 hours in February, signaling the initial arrival of spring. March further extends daylight to 11 hours, while April ushers in longer days with 13 hours as the sun climbs higher in the sky. The burgeoning light continues through May, reaching 15 hours, and sustains this duration into June and July, marking the peak of summer.
As summer transitions into autumn, daylight hours begin to wane, starting with 15 hours in August, followed by a decrease to 14 hours in September. October witnesses another drop to 10 hours, accentuating the shift towards shorter days. This trend continues in November, where daylight is reduced to 9 hours, before settling back at 8 hours in December. This rhythmic cycle of daylight duration not only impacts daily activities and energy levels but also profoundly influences the ecological dynamics and agricultural practices within the region throughout the year.
Baden, Switzerland experiences a varied climate throughout the year, with cold winters and warm summers. January temperatures range from a minimum of -15°C to a maximum of 16°C, while July sees much warmer averages of 20°C and highs of 35°C. Precipitation is relatively high in the summer months, peaking in August with 141 mm, while May also receives significant rainfall at 132 mm. The region enjoys the most sunshine in July, with 413 hours, contributing to pleasant summer days. For more detailed information, visit Baden climate.
Bremgarten, Switzerland, experiences a diverse climate characterized by cold winters and warm summers. January temperatures range from a chilly -11°C to a pleasant 15°C, while July sees highs reaching up to 34°C. Precipitation is fairly evenly distributed throughout the year, with July being the wettest month at 164 mm. The town enjoys significant sunshine, especially in June and July, accumulating up to 415 hours of sun. For more detailed insights, visit Bremgarten climate.
Lenzburg, Switzerland experiences a diverse climate with significant seasonal variation. Winter months are chilly, with January temperatures ranging from -15°C to 16°C, and average precipitation peaking in May and August at around 132-141 mm. Summers are warm, particularly in July, when temperatures reach a maximum of 35°C. The area enjoys ample sunshine, especially in the summer, with July receiving up to 413 hours of sunlight. For more details on the weather patterns, visit Lenzburg climate.
Rheinfelden, Switzerland, experiences a diverse climate throughout the year, with winter temperatures ranging from lows of -13°C (8°F) in January to mild averages of 1°C (35°F). By summer, temperatures peak at a maximum of 36°C (98°F) in July, accompanied by significant sunshine, particularly in June and July with over 389 hours of sunlight. The region receives ample rainfall, peaking at 126 mm (5.0 in) in May, while October and December also experience noteworthy precipitation. This varied climate supports a rich environment, making Rheinfelden an appealing destination for visitors year-round. For more details, visit Rheinfelden climate.
In conclusion, Aargau, Switzerland, showcases a multifaceted climate characterized by its distinct seasonal variations in temperature, precipitation, sunshine duration, UV Index, and daylight hours. From the chill of winter, with its limited daylight and low UV exposure, to the vibrant warmth of summer, which brings long days and high UV levels, the region offers a unique environmental tapestry. Understanding these climatic elements is crucial for both residents and visitors, as they navigate outdoor activities, agricultural practices, and health considerations related to sun exposure. This intricate interplay of factors not only shapes Aargau’s ecosystem but also enriches the quality of life for those who inhabit this picturesque region.