Last updated: February 26, 2025
In Karlsruhe, Germany, September brings a delightful transition from summer to autumn, with maximum temperatures reaching up to 32°C (90°F) and an average of 16°C (62°F). While some days can be pleasantly warm, the month also experiences cooler lows around 4°C (40°F). Rainfall totals approximately 48 mm (1.9 in) over 8 days, contributing to a humidity level of 85% that adds a bit of crispness to the air. This mix of warmth and occasional rain makes September a captivating time to explore the city's beautiful parks and vibrant cultural scene.
In September, Karlsruhe experiences a delightful transition from summer's heat to the crispness of autumn. With minimum temperatures around 4°C (40°F) and a comfortable average of 16°C (62°F), the city's climate invites outdoor exploration. As days warm up, maximum temperatures can reach up to 32°C (90°F), making it one of the last chances to enjoy late summer sunshine. This month often showcases a balance between lingering warmth and the early signs of fall, reflecting a gradual but notable decline in temperature compared to the higher peaks of summer. As the month progresses, residents and visitors alike can savor the beauty of shifting foliage against a backdrop of pleasantly mild weather.
September in Karlsruhe marks a noticeable shift towards drier weather, with precipitation amounting to only 48 mm (1.9 in) over eight days. This reduction is a significant drop from the summer months, which consistently feature higher rainfall, peaking in May at 84 mm (3.3 in). As autumn approaches, this downward trend in precipitation reflects a broader seasonal transition, moving from the wetter summer months to the dryer conditions typical of fall. The trend underscores Karlsruhe's temperate climate, where September acts as a bridge, allowing residents to enjoy relatively sunny days before the heavier rains of winter return.
September in Karlsruhe, Germany, experiences a notable drop in humidity compared to the peak summer months, with levels settling at 85%. This slight decrease from August's 84% reflects a gradual transition towards autumn, characterized by more comfortable yet still humid conditions. Over the course of the year, we see a clear trend where humidity peaks during the colder months of January and February at 91%, gradually diminishing toward a low of 79% in May. However, as the seasons change, humidity levels begin to slowly creep back up from late summer into fall, suggesting that while September offers some relief from summer's heat, the air remains distinctly moist as the year progresses.
As September rolls into Karlsruhe, the UV Index begins to taper from the intense heights of summer, yet still maintains a high level at 6. With a burn time of 25 minutes, it's crucial to stay sun-smart during this transition month. The UV Index in Karlsruhe has shown a trend of increasing intensity from the cooler winter months, peaking at 8 in May through July, before gradually declining in August and September. This seasonal shift reminds residents and visitors alike to be vigilant against sun exposure, especially with upcoming autumn days still offering plenty of sunshine. For comprehensive details, visit the Karlsruhe UV Index to stay informed and enjoy the sun safely!
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As summer gracefully transitions into autumn, September in Karlsruhe brings a delightful 322 hours of sunshine, a noticeable dip from the sun-drenched heights of July and June but still a substantial amount compared to the winter months. This month benefits from the lingering warmth and brightness of summer, marking a period where days are still long and balmy. After the peak solar exposure in the earlier summer months, September balances shorter days with the remnant glow of sunshine, making it a perfect time for outdoor activities. With the sun's rays continuing to grace the city, Karlsruhe enjoys a gentle shift towards the cozy charm of fall, where the fading sun offers a golden backdrop to vibrant autumn foliage.
In September, Karlsruhe experiences a notable increase in sunshine, with a 47% chance of sunny weather. This positions the month as one of the brighter times of the year, following the relatively modest probabilities seen in the summer months of July and August, which hover around 39% and 33% respectively. As summer transitions to autumn, September offers an enticing opportunity for outdoor activities, benefiting from the lingering warmth and clearer skies. This trend showcases the seasonal shift, where opportunities for sun are still abundant before the chill of October rolls in with a declining 35% chance. Overall, September's weather is a delightful blend of summer's end and autumn's beginning, promising plenty of sunshine for those looking to enjoy the outdoors.
In September, Karlsruhe basks in approximately 12 hours of daylight, marking a gentle transition from the sun-drenched days of summer. Compared to the peak of 16 hours in June, this month introduces a gradual decrease, reminiscent of the shifting seasons. Following the vibrant warmth of July and August, where daylight hours lingered delightfully, September invites residents to savor the last golden rays of light before the days shorten further in autumn. As daylight wanes, the cool embrace of fall begins to set in, highlighting the beauty of nature’s cycle and preparing the city for the cozy months ahead.
As summer transitions into autumn in Karlsruhe, September brings a notable shift in the winds. With an average wind speed of 2.1 m/s (5 mph), this month is notably calmer compared to the earlier summer and spring months. The gentle breezes of September create a soothing atmosphere, in contrast to the slightly brisker winds in May, which peak at 3.7 m/s (8 mph). This dip in wind speed not only sets a tranquil tone for the season but also hints at the impending cooler days of autumn, where wind speeds gradually rise again in October. Observing these trends, one can appreciate how the climatic rhythm of Karlsruhe flows through the year, each month offering its unique charm.
The weather in Karlsruhe changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Karlsruhe and find detailed weather information for every month.
In September, temperatures tend to be much warmer, with averages around 16°C (62°F) and highs reaching up to 32°C (90°F), while January experiences its chill, with average temperatures dropping to around 3°C (37°F) and lows plunging to -12°C (10°F). Precipitation levels are slightly lower in September at 48 mm (1.9 in) over about 8 days, compared to January’s 75 mm (2.9 in), which occurs over 12 days. Humidity is also notable; September has 85%, while January sees a rise to 91%. For a more detailed look at January weather, you can visit Karlsruhe weather in January.
When comparing the weather in September and February, distinct contrasts are noticeable. September generally boasts warmer temperatures, with an average of 16°C (62°F) and highs reaching up to 32°C (90°F), making it a much more pleasant month for outdoor activities. In contrast, February experiences much colder conditions, with an average temperature of only 5°C (40°F) and even lower minimums dropping to -12°C (10°F).
Precipitation levels are higher in February, totaling 68 mm (2.7 in) over 11 days, as opposed to September's 48 mm (1.9 in) over 8 days. Humidity is slightly elevated in February at 89%, compared to September's 85%. For more detailed information about February weather, you can check Karlsruhe weather in February.
September and March present contrasting weather experiences. In September, temperatures range from a mild 4°C (40°F) at night to a warm 32°C (90°F) during the day, averaging around 16°C (62°F). The month sees relatively low precipitation with 48 mm (1.9 in) and about 8 rainy days, alongside a high humidity level of 85%. In contrast, March is significantly cooler, with temperatures dipping as low as -11°C (13°F) at night and peaking at 23°C (73°F) during the day, averaging 7°C (45°F). March typically experiences more rainfall, totaling 76 mm (3.0 in) over about 14 days, and slightly higher humidity at 87%. This variance highlights the transition from summer warmth in September to the brisk early spring in March. For more specific details on March weather, refer to Karlsruhe weather in March.
When comparing the weather between September and April, it is evident that September tends to be warmer overall. September experiences average temperatures ranging from a chilly 4°C (40°F) to a maximum of 32°C (90°F), while April has a cooler average with temperatures dipping as low as -3°C (27°F) and peaking at 28°C (82°F). Precipitation levels are fairly close, with September seeing 48 mm (1.9 in) over 8 days and April slightly lower at 36 mm (1.4 in) also over 8 days. Both months exhibit high humidity, with September at 85% and April at 83%, but the warmth of September makes it feel more muggy. For more detailed insights on April weather, you can check out Karlsruhe weather in April.
September and May present distinct weather characteristics. In September, temperatures fluctuate more dramatically, with a minimum of 4°C (40°F) and maximum reaching up to 32°C (90°F), averaging around 16°C (62°F). The month sees about 48 mm (1.9 in) of precipitation over approximately 8 days, coupled with a higher humidity of 85%. In contrast, May generally experiences milder temperatures, starting from a minimum of 1°C (34°F) and peaking at 31°C (88°F), with an average of 14°C (58°F). However, it receives more rainfall, totaling 84 mm (3.3 in) over about 13 days, while humidity is slightly lower at 79%. For more detailed information, you can check Karlsruhe weather in May.
When comparing the weather in September and June, we notice some distinct differences. September generally sees a wider temperature range with minimums dropping to 4°C (40°F), while June's minimum temperatures are higher at around 8°C (47°F). Average temperatures are milder in September, averaging 16°C (62°F) compared to June's warmer 20°C (68°F). However, June can reach higher maximum temperatures, peaking at 36°C (96°F) versus September's maximum of 32°C (90°F). In terms of precipitation, June tends to be wetter with 79 mm (3.1 in) falling over 11 days, compared to September's 48 mm (1.9 in) over 8 days. Humidity levels are slightly higher in September at 85%, while June holds steady at 82%. For more specific details, you can explore Karlsruhe weather in June.
When comparing the weather in September and July, September generally offers cooler temperatures with a minimum of 4°C (40°F) and an average of 16°C (62°F), while July tends to be warmer, with minimums around 10°C (50°F) and an average of 21°C (70°F). The maximum temperatures in September can reach up to 32°C (90°F), but July can be significantly hotter, peaking at 38°C (101°F). Precipitation is also slightly higher in July, with 67 mm (2.6 in) falling over 12 days compared to September’s 48 mm (1.9 in) across 8 days. Both months experience high humidity levels, around 85% in September and 83% in July. For more detailed information about July weather, check out Karlsruhe weather in July.
September weather shows a notable drop in temperature compared to August, with minimums dipping from 8°C (47°F) in August to 4°C (40°F) in September. The average temperature also decreases from 21°C (69°F) in August to 16°C (62°F) in September, while the maximum temperature sees a smaller decline from 35°C (95°F) to 32°C (90°F). In terms of precipitation, September receives 48 mm (1.9 in) over 8 days, which is slightly less than August's 60 mm (2.4 in) across 12 days. Humidity levels remain similar, with September at 85% and August at 84%. For a detailed view of weather trends, check out Karlsruhe weather in August.
In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 32°C (90°F), with an average of 16°C (62°F). The month sees around 48 mm (1.9 in) of precipitation over 8 days, coupled with a humidity level of 85%. In contrast, October brings cooler temperatures, with a minimum of 2°C (36°F), an average of 12°C (54°F), and a maximum of 27°C (80°F). Furthermore, October experiences increased precipitation of 68 mm (2.7 in) over 13 days and slightly higher humidity at 88%. For more detailed information, you can explore Karlsruhe weather in October.
In September, weather conditions are typically warmer, with temperatures ranging from a minimum of 4°C to a maximum of 32°C and an average of 16°C. This month experiences relatively lower precipitation (48 mm over 8 days) and a humidity level of 85%. In contrast, November presents a cooler climate, with temperatures dropping significantly, featuring a minimum of -2°C, an average of 6°C, and a maximum of 22°C. Precipitation increases slightly to 53 mm, spread over 10 days, while humidity rises to 89%. For a closer look at November conditions, you can refer to Karlsruhe weather in November.
September and December present striking contrasts in weather. In September, temperatures can range from a mild 4°C (40°F) at night to a warm 32°C (90°F) during the day, with an average of 16°C (62°F). The month experiences moderate rainfall, totaling 48 mm (1.9 in) over about 8 days, and humidity levels are relatively high at 85%. In contrast, December sees much colder temperatures, with a minimum of -5°C (24°F) and a maximum of only 14°C (58°F), averaging around 4°C (40°F). This month is also wetter, with precipitation reaching 108 mm (4.2 in) across approximately 18 days and an increased humidity level of 91%. For a closer look at the weather conditions specific to December, you can check out Karlsruhe weather in December.
As summer gradually gives way to autumn, September in Karlsruhe showcases a unique blend of warmth and coolness, offering a refreshing transition compared to the hotter months that precede it. With maximum temperatures reaching a comfortable 32°C, the average drops to a mild 16°C, while cooler nights can dip to a brisk 4°C. This month stands out with relatively high humidity and moderate rainfall spread over eight days, creating an atmosphere that feels lush yet invigorating. This delightful mix makes September an ideal time for outdoor activities, as the city basks in the last glimpses of summer while preparing for the crispness of fall. For a deeper understanding of seasonal shifts, visit Karlsruhe Climate.