Last updated: February 26, 2025
September in Ulm, Germany showcases a dynamic blend of early autumn weather, offering an appealing range of daily temperatures. With a maximum of 28°C (83°F) and an average of 14°C (58°F), the city experiences a mild transition as summer fades. However, temperatures can drop to a brisk 1°C (35°F), emphasizing the need for layers. Rainfall is not uncommon, with 64 mm (2.5 in) spread over 12 days, contributing to the region's lush, green landscapes. The 85% humidity adds a touch of moisture to the air, creating a refreshing atmosphere that embodies the charm of September in Ulm.
As September settles in Ulm, Germany, a noticeable shift in temperatures marks the transition from summer to autumn. Daytime highs reach a pleasant 28°C (83°F), offering warm afternoons perfect for outdoor activities, while the nights cool down significantly, dipping to a brisk 1°C (35°F). The average temperature hovers around 14°C (58°F), striking a balance that makes this month ideal for enjoying local festivities and harvests. This gradual cooling foreshadows the cooler months ahead, creating a comfortable yet invigorating atmosphere that epitomizes early autumn in the region.
September in Ulm, Germany, typically ushers in a moderate shift in weather as summer begins to fade. With an average precipitation of 64 mm (2.5 in) over about 12 days, it marks a slight decrease compared to the wetter months preceding it, particularly August, which recorded 107 mm (4.2 in). Interestingly, this lower total hints at the gradual transition into the drier autumn period, as the city enjoys a balance of occasional showers without the heavy downpours characteristic of the late spring and early summer. As the month progresses, residents can expect a typical blend of sun and rain, setting the stage for the crisp air of October that follows.
In September, Ulm, Germany, experiences a humidity level of 85%, marking a slight increase from the summer months. This uptick is reflective of the seasonal transition, as humidity levels tend to gradually rise after hitting their annual low of 79% in May. Following a consistent rhythm, the autumn months see humidity inch upwards once more, with October's 88% and November's 89% signaling a return to the dampness characteristic of winter. Overall, September stands as a bridge, where the warmth of summer begins to mingle with the cooler, wetter atmosphere that builds as the year draws to a close.
As September rolls into Ulm, Germany, the UV Index takes a noticeable dip after the intense summer months, settling at a moderate level of 6. This means that while sun exposure is still significant, the risk of harm from unprotected sun exposure is lower compared to the peaks seen in July and August. With a burn time of 25 minutes, it’s essential for residents and visitors alike to embrace sun safety measures, especially during midday hours. As the season transitions into autumn, the days may grow shorter, but the sun still delivers a potent punch, reminding everyone to stay vigilant. For more detailed information on solar activity, you can check the Ulm UV Index.
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September in Ulm, Germany, basks in a glow of 315 hours of sunshine, marking a splendid transition into autumn. As summer fades, the month still enjoys a significant amount of bright days, nestled comfortably between the sun-drenched heights of July and August, at 414 and 380 hours respectively. This gradual decline from the summer peak hints at the approaching chill of fall, with October's sunshine dipping to 266 hours. Despite this seasonal shift, September's radiant days provide an inviting opportunity for outdoor activities and picturesque strolls along the Danube, allowing locals and visitors alike to relish the lingering warmth before winter sets in. The trend of dwindling light hours reminds us of nature's rhythm, emphasizing the joyous embrace of every sunlit moment.
September in Ulm, Germany, welcomes the fading warmth of summer with an encouraging 46% chance of sunshine, making it one of the sunniest months of the year. This marks a notable increase from the preceding months, especially when compared to July and August, which hover around 32% to 34%. As summer transitions to autumn, the likelihood of clear skies in September offers a delightful opportunity for outdoor activities and exploration. Just before the cooler October months set in, September stands out as a golden period where sunshine is more likely, providing the perfect backdrop for enjoying the picturesque charm of Ulm.
As summer fades into early autumn, September in Ulm, Germany marks a subtle transition in daylight duration. With about 12 hours of daylight, it offers a pleasing balance between the sun-drenched days of June (16 hours) and the shorter daylight hours of October (10 hours). The month retains a sense of warmth and brightness, lingering just above the autumn equinox, yet hints at the impending shift toward the cozier, darker months of the year. This gradual decline in daylight, following the peak of radiant summer, reflects nature's rhythm, preparing the city for the comforting embrace of fall while still allowing ample time to enjoy outdoor activities against the backdrop of early autumn's beauty.
As September unfolds in Ulm, Germany, the breezes shift to a calmer rhythm, with an average wind speed of 2.0 m/s (5 mph)—the lowest of the year. This gentle airflow marks a noticeable decline from the more spirited spring and early summer months, where winds frequently peaked at 3.6 m/s (8 mph) in May. The transition into autumn brings a softer touch, inviting us to savor the serene beauty of the changing foliage without the distraction of strong gusts. As we embrace the onset of autumn in Ulm, this subtle wind serves as a reminder of nature's graceful pace, bridging the vibrant summer energy with the tranquil embrace of the cooler months ahead.
The weather in Ulm 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 Ulm and find detailed weather information for every month.
September and January present a stark contrast in weather conditions. In September, temperatures range from a chilly 1°C (35°F) at night to a warm 28°C (83°F) during the day, with an average of 14°C (58°F). The month experiences about 64 mm (2.5 in) of precipitation over 12 days and maintains a humidity level of 85%. In comparison, January is significantly colder, with temperatures dipping as low as -15°C (5°F) and averaging around 0°C (33°F), peaking at 13°C (56°F). This winter month tends to have a slightly higher precipitation level of 67 mm (2.6 in) across 11 days, accompanied by an even higher humidity of 91%. For more specific details, you can refer to Ulm weather in January.
When comparing the weather in September and February, we see a striking contrast. September enjoys milder temperatures, with minimums around 1°C (35°F) and maximums reaching 28°C (83°F), averaging a comfortable 14°C (58°F). In contrast, February presents a much colder climate, with minimum temperatures plummeting to -18°C (-1°F) and an average of just 2°C (37°F), peaking at a maximum of 18°C (65°F). Both months experience similar precipitation levels, with September receiving 64 mm (2.5 in) over 12 days and February slightly higher at 66 mm (2.6 in) over 11 days. Additionally, February tends to have a higher humidity level of 89% compared to September's 85%. For more details on weather specifics, you can check Ulm weather in February.
September and March exhibit contrasting weather patterns, reflecting the transition from late summer to early spring. In September, temperatures range from a minimum of 1°C (35°F) to a warm maximum of 28°C (83°F), with an average of 14°C (58°F). This month sees around 64 mm (2.5 in) of precipitation over approximately 12 days, and humidity hovers at 85%. Conversely, March tends to be much colder, with temperatures ranging from a low of -16°C (3°F) to a maximum of 21°C (70°F) and an average of just 5°C (41°F). Precipitation slightly increases to 68 mm (2.7 in) over about 13 days, accompanied by a humidity of 87%. For more details on March weather, you can refer to Ulm weather in March.
When comparing the weather in September and April, notable differences emerge. September typically features a wider temperature range, with minimums around 1°C (35°F) and maximums soaring to 28°C (83°F), averaging 14°C (58°F). The month has a higher precipitation level of 64 mm (2.5 in) over about 12 days, along with higher humidity at 85%. In contrast, April experiences colder temperatures, ranging from a minimum of -6°C (21°F) to a maximum of 26°C (79°F), leading to an average of 9°C (48°F). This month sees less rainfall, with 42 mm (1.7 in) over 9 days, and only slightly lower humidity at 83%. For more specific details on April weather, you can visit Ulm weather in April.
In comparing the weather of September and May, we see distinct differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums around 1°C (35°F) and maximums peaking at 28°C (83°F), while May has slightly cooler minimums at -2°C (29°F) but can also reach similar highs of 29°C (85°F). Rainfall in September totals 64 mm (2.5 in) over approximately 12 days, making it relatively drier than May, which sees 106 mm (4.2 in) spread over 16 days, indicating wetter conditions with lower humidity at 79%. In contrast, September has a higher humidity level of 85%, contributing to a different feel during the transitional season. For a closer look at conditions in May, you can check Ulm weather in May.
In comparing September and June weather, September brings a wider temperature range with minimums around 1°C (35°F) and maximums reaching 28°C (83°F), averaging at 14°C (58°F). In contrast, June typically has milder temperatures, with minimums at 5°C (41°F) and maximums soaring up to 33°C (92°F), averaging 17°C (64°F). Rainfall is also more pronounced in June, with 124 mm (4.9 in) of precipitation spread over about 14 days, compared to September's 64 mm (2.5 in) across 12 days. Despite these differences, both months feature high humidity levels, with September slightly higher at 85% compared to June's 82%. For further details on June weather, check Ulm weather in June.
In comparing the weather between July and September, July typically experiences warmer temperatures, with a minimum of 6°C (44°F) and a maximum reaching 34°C (94°F), resulting in an average temperature of 18°C (65°F). In contrast, September's temperatures are cooler, featuring a minimum of 1°C (35°F) and a maximum of 28°C (83°F), with an average of 14°C (58°F). Both months see significant precipitation, with July receiving 89 mm (3.5 in) over 13 days and September slightly less at 64 mm (2.5 in) over 12 days. Humidity levels are similar, at 83% in July and slightly higher at 85% in September. For a more detailed view of July weather, you can check Ulm weather in July.
In comparing the weather between September and August, we notice a significant shift in temperatures and precipitation. September experiences a broader temperature range, with a minimum of 1°C (35°F) and a maximum of 28°C (83°F), resulting in a cooler average of 14°C (58°F). In contrast, August is warmer, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 32°C (90°F) and an average of 18°C (65°F). Additionally, September sees less rainfall, with 64 mm (2.5 in) over 12 days compared to 107 mm (4.2 in) over 14 days in August. Humidity levels remain quite similar, at 85% in September and 84% in August. For more detailed information, you can check Ulm weather in August.
In September, the weather tends to be warmer, with temperatures ranging from a minimum of 1°C (35°F) to a maximum of 28°C (83°F) and an average of 14°C (58°F). The month experiences moderate precipitation, totaling 64 mm (2.5 in) over about 12 days, with humidity levels relatively high at 85%. In contrast, October sees cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 23°C (74°F), averaging 10°C (50°F). Precipitation slightly increases to 67 mm (2.6 in), also spread across 12 days, but humidity rises to 88%. For a detailed look at what to expect, check out Ulm weather in October.
September's weather is characterized by a warmer and more varied temperature range, with minimum temperatures around 1°C (35°F), average temperatures reaching 14°C (58°F), and maximums peaking at 28°C (83°F). The month sees an average of 64 mm (2.5 in) of precipitation across approximately 12 days, with humidity levels around 85%. In contrast, November brings cooler conditions, featuring a lower minimum temperature of -4°C (25°F) and an average of just 4°C (39°F), although maximum temperatures can still reach 19°C (66°F). Precipitation decreases slightly to 50 mm (2.0 in) over 10 days, accompanied by a higher humidity of 89%. For more details on November weather, check Ulm weather in November.
In September, temperatures are more moderate, ranging from a chilly 1°C (35°F) at night to a warm 28°C (83°F) during the day, with an average of 14°C (58°F). The month sees about 64 mm (2.5 in) of precipitation over 12 days, and humidity levels hover around 85%. In contrast, December brings much colder weather, with temperatures dropping significantly to a minimum of -9°C (16°F) and a maximum of only 13°C (56°F), resulting in an average of just 2°C (35°F). The month also experiences higher precipitation levels, with 98 mm (3.9 in) spread across 17 days, and humidity increasing slightly to 91%. For more details, you can check Ulm weather in December.
As September settles into Ulm, the weather transitions from the warmth of summer to the crispness of autumn. The average temperature, while still pleasantly mild, showcases a more pronounced range between the highs and lows compared to the preceding months. A notable increase in humidity adds a gentle layer to the air, often accompanied by sporadic rainfall across about half of the days in the month. This shift contrasts with the rather drier, hotter characteristics of July and August, making September a refreshing yet variable month. For a deeper understanding of how September fits into the broader trend, check out Ulm Climate.