September Weather in Stuttgart, Germany

Last updated: February 26, 2025

Experience the charm of Stuttgart, Germany in September, where the weather presents a delightful mix of mild temperatures and refreshing changes. With a maximum of 29°C (85°F) and an average of 15°C (59°F), visitors can enjoy a comfortable climate perfect for exploring the city. However, be prepared for cooler nights, as temperatures can dip to a brisk 1°C (34°F). Expect about 48 mm (1.9 in) of rainfall spread over 9 days, contributing to a humid atmosphere at 85%. This month is ideal for those who appreciate a blend of warmth and occasional rain, making Stuttgart's vibrant culture and stunning landscapes even more enchanting.

September Temperature in Stuttgart

In September, Stuttgart experiences a welcoming transition into autumn, with temperatures that reflect a gradual cooling from the summer's heat. The month starts with a minimum of around 1°C (34°F) at night, hinting at the upcoming chill, while daytime averages reach a comfortable 15°C (59°F). As the sun shines down, highs can soar to 29°C (85°F), allowing outdoor enthusiasts to enjoy the city's vibrant parks and scenic views before the cooler months settle in. This fluctuation captures a perfect blend of summer's lingering warmth and autumn's crisp air, making September a delightful time to explore Stuttgart’s seasonal beauty.

September Weather in Stuttgart: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Stuttgart, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec353842495665676759514138
Data source: Temperature data for Stuttgart generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Stuttgart

In September, Stuttgart experiences a noticeable dip in precipitation, with only 48 mm (1.9 in) of rainfall over 9 days—a significant decline compared to the summer months. This trend reflects the transition from the lushness of August, which recorded 82 mm (3.2 in), to the more moderate, early autumn climate of October. As the city edges toward fall, the reduction in rain, alongside shorter precipitation spans, may hint at drier conditions. This pattern of declining rainfall hints at a shift in seasons, inviting residents and visitors alike to embrace the crisper, clearer days that September often brings.

September Precipitation Trends in Stuttgart

The chart displays monthly precipitation patterns in Stuttgart, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec736775418795718248685197
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Stuttgart

As summer transitions to autumn, September in Stuttgart experiences a slight uptick in humidity, reaching 85%. This figure marks a subtle rise from August's 84%, signaling the lingering warmth of late summer. Throughout the year, Stuttgart's humidity exhibits a general decline from the high 91% in January to its seasonal low in May at 79%. After a brief summer respite, where humidity hovers in the low to mid-80s, the levels begin to ascend again as cooler months approach. With October bringing humidity back up to 88%, the shifting patterns reflect the city's characteristic embrace of the changing seasons, hinting at the damp chill of winter on the horizon.

September Average Humidity in Stuttgart

This chart illustrates the average monthly humidity levels in Stuttgart, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%83%79%82%83%84%86%88%89%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Stuttgart

As summer fades in Stuttgart, the September UV Index settles at a moderate level of 6, indicating a high risk of harm from unprotected sun exposure. This decrease from the peak of 9 in July and August brings longer burn times of 25 minutes. While the intensity of the sun's rays diminishes compared to the peak summer months, September still requires caution, particularly during midday hours. As we transition to autumn, it remains essential to stay informed and protect your skin while enjoying the pleasant weather. For detailed insights on UV exposure, check out Stuttgart UV Index.

Maximum UV Index Levels in Stuttgart for September

The chart shows the monthly maximum UV Index (UVI) for Stuttgart in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Stuttgart September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Stuttgart

In September, Stuttgart basks in the warm afterglow of summer, accumulating an impressive 317 hours of sunshine. This month marks a gentle transition from the long, sun-drenched days of July, which boasts the highest sunshine hours at 411, to the crisp embrace of autumn as October brings a decline to 263 hours. September's sunshine continues to reflect the trends of increasing light from the year’s start, peaking in midsummer before beginning its descent. As the vibrant hues of summer fade, the sunlight lingers a while longer, inviting residents and visitors alike to enjoy the lush surroundings of Stuttgart before the cooler months set in.

Monthly Sunshine Duration in Stuttgart: September Highlighted

The September sunshine duration represents the total number of hours Stuttgart experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec130h207h280h344h377h389h411h377h317h263h195h145h
Data source: Stuttgart September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Stuttgart During September

In Stuttgart, Germany, September emerges as a promising month for sun-seekers, with a sunny chance of 46%—the same level of optimism found in April. This trend signals a delightful transition, as the city bids farewell to summer while still enjoying mild, sun-kissed days. The likelihood of sunny weather peaks in early autumn, suggesting that September can often feel like an extension of the warmer months. As temperatures begin to cool down, this blend of sunshine and pleasant weather makes it an ideal time for outdoor activities, blooming festivities, and leisurely strolls through the city's picturesque parks. Stay optimistic; September offers a golden opportunity to soak up the sun before the clouds roll in with the approaching autumn chill.

Percentage of Sunny Days in September in Stuttgart

The chart illustrates the percentage of sunny days in Stuttgart throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Stuttgart experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec12%39%42%46%30%34%36%35%46%32%24%19%
Data source: Stuttgart September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Stuttgart in September

As September rolls into Stuttgart, Germany, the city experiences a gentle transition in daylight duration, where the sun graces the sky for 12 hours each day. This marks a noticeable decline from the peak of 16 hours in June and a gradual descent that began in mid-summer. The days, still warm and inviting, offer a comforting balance of light as summer fades, moving towards the shorter days of autumn. This trend of diminishing daylight continues into October and November, making September a poignant reminder of the lingering warmth before the sun’s retreat. As nature prepares for the crispness of fall, the daylight serves as a bridge between the vibrant life of summer and the tranquil hush of winter ahead.

Average Daylight Hours in Stuttgart for September

The chart illustrates the variation in daylight duration in Stuttgart throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 46m10h 10m11h 55m13h 43m15h 15m16h 3m15h 38m14h 15m12h 32m10h 45m9h 10m8h 20m
Data source: Stuttgart daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Stuttgart

In September, the gentle breezes of Stuttgart begin to signal the transition into autumn, with an average wind speed of just 1.8 m/s (4 mph). This marks a notable dip from the earlier summer months, where winds often danced slightly stronger around 2.1 m/s to 3.3 m/s. As the foliage starts to turn and temperatures cool, the lighter winds create a serene atmosphere, inviting residents and visitors alike to enjoy the city's charming parks and vibrant streets. Compared to the year’s peak in May, when winds reached their summer high, September’s calmness fosters a reflective mood, enhancing the seasonal shift and encapsulating the tranquil essence of early fall in Germany.

Average September Wind Speed in Stuttgart

The chart displays monthly wind speed patterns in Stuttgart, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.22.82.82.53.32.02.12.31.8 m/s2.42.32.8
Data source: Stuttgart September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Stuttgart Compares to Other Months

The weather in Stuttgart 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 Stuttgart and find detailed weather information for every month.

The weather in September is characterized by mild temperatures, with averages around 15°C (59°F) and highs reaching up to 29°C (85°F), making it feel quite pleasant, though humidity can be high at 85%. In contrast, January brings a stark chill, with average temperatures dropping to 1°C (35°F) and nighttime lows plummeting to -22°C (-7°F), creating a much harsher climate. Precipitation is also more frequent in January, occurring over 12 days, compared to 9 days in September, but it totals 73 mm (2.9 in) versus September's 48 mm (1.9 in). For more details on January weather, you can visit Stuttgart weather in January.

When comparing the weather in September and February, it's clear that these months embody distinct seasonal characteristics. September boasts a mild temperature range with lows of 1°C (34°F) and highs reaching 29°C (85°F), making the month feel warm and pleasant despite occasional rainfall, totaling 48 mm (1.9 in) over about 9 days, with a humidity level of 85%. In contrast, February experiences much colder conditions, with minimum temperatures dropping to -18°C (0°F) and a maximum of 20°C (68°F). Precipitation in February is slightly higher at 67 mm (2.6 in) spread over approximately 10 days, accompanied by a marginally higher humidity of 89%. The two months highlight the transition from the warmth of late summer to the chill of winter — for more details, visit Stuttgart weather in February.

September and March showcase contrasting weather patterns. In September, temperatures range from a chilly 1°C (34°F) at night to a warm average of 15°C (59°F), peaking at 29°C (85°F) during the day, accompanied by relatively moderate precipitation of 48 mm (1.9 in) over 9 days and humidity at 85%. In stark contrast, March experiences colder conditions, with minimum temperatures dropping to -16°C (4°F) and an average of 6°C (43°F), while daytime highs reach 22°C (72°F). Additionally, March sees higher precipitation levels at 75 mm (3.0 in) across 13 days and slightly increased humidity at 87%. For more details, you can check Stuttgart weather in March.

In September, temperatures in Stuttgart range from a crisp 1°C (34°F) at night to a warm average of 15°C (59°F) during the day, peaking at a maximum of 29°C (85°F). The month experiences about 48 mm (1.9 in) of precipitation over nine days, accompanied by relatively high humidity at 85%. In contrast, April presents cooler conditions, with temperatures starting from -5°C (23°F) and averaging at 10°C (50°F), while reaching a maximum of 27°C (80°F). Although April sees slightly less precipitation at 41 mm (1.6 in) over the same number of days, it maintains a comparable humidity level of 83%. For a closer look at what to expect, you can visit Stuttgart weather in April.

In September, temperatures range from a minimum of 1°C (34°F) to a comfortable maximum of 29°C (85°F), with an average of 15°C (59°F). The month sees an average of 9 rainy days, totaling 48 mm (1.9 in) of precipitation, while humidity levels remain relatively high at 85%. In contrast, May experiences slightly cooler temperatures, with a minimum of -1°C (31°F) and an average of 13°C (56°F), peaking at 31°C (87°F). However, May receives more rainfall, averaging 87 mm (3.4 in) over 13 rainy days, and slightly lower humidity levels at 79%. For those looking to compare the weather patterns more closely, you can find more details in this link: Stuttgart weather in May.

September experiences a more varied range of temperatures, with minimums dropping to 1°C (34°F) and maximums reaching up to 29°C (85°F). In contrast, June is generally warmer, with minimum temperatures around 5°C (42°F) and maximums peaking at 34°C (93°F). While September has an average temperature of 15°C (59°F), June averages slightly warmer at 19°C (66°F). Additionally, September sees less precipitation at 48 mm (1.9 in) over 9 days, compared to June's 95 mm (3.7 in) over 12 days, although both months maintain high humidity levels, around 85% in September and 82% in June. For a detailed overview, you can check Stuttgart weather in June.

When comparing the weather in September and July, we see distinct differences in temperature and precipitation. September features a wider range in daily temperatures, with minimums as low as 1°C (34°F) and maximums reaching up to 29°C (85°F), resulting in an average temperature of 15°C (59°F). In contrast, July is generally warmer, with minimum temperatures around 8°C (47°F) and maximums soaring to 36°C (97°F), leading to an average of 19°C (67°F). Precipitation levels are higher in July, totaling 71 mm (2.8 in) over 12 days, compared to September's 48 mm (1.9 in) over 9 days, although humidity remains relatively similar, at 85% in September and 83% in July. For a more detailed look at the specifics of July weather, you can check Stuttgart weather in July.

In comparing the weather between August and September, it’s noticeable that August tends to be warmer, with average temperatures reaching 19°C (67°F) and maximum highs of 35°C (95°F). Conversely, September sees a decrease in temperatures, featuring a minimum of 1°C (34°F), an average of 15°C (59°F), and a maximum of 29°C (85°F). Precipitation is also higher in August, accumulating 82 mm (3.2 in) over 12 days, compared to September's 48 mm (1.9 in) across 9 days. Both months exhibit high humidity levels, with September slightly higher at 85% compared to August’s 84%. For more detailed insights, you can check Stuttgart weather in August.

September and October showcase a notable transition in weather patterns. In September, temperatures range from a mild 1°C (34°F) at night to a warm 29°C (85°F) during the day, with an average of 15°C (59°F). However, as October arrives, the temperature drops slightly, featuring a minimum of -1°C (31°F), an average of 11°C (52°F), and a maximum of 25°C (78°F). Additionally, October experiences increased precipitation, with 68 mm (2.7 in) over 13 days, compared to September's 48 mm (1.9 in) over 9 days. Humidity also rises from 85% in September to 88% in October, contributing to a distinctly cooler and wetter atmosphere. For more detailed insights, visit Stuttgart weather in October.

September features a broader range of temperatures, with minimums around 1°C (34°F) and maximums reaching up to 29°C (85°F), resulting in an average of 15°C (59°F). The month experiences some rainfall, with a total precipitation of 48 mm (1.9 in) over 9 days and a humidity level of 85%. In contrast, November sees a notable drop in temperatures, with minimums dipping to -4°C (25°F) and an average temperature of 5°C (41°F). Although the maximum can still reach 21°C (71°F), the overall feel is much cooler. November also witnesses slightly higher precipitation at 51 mm (2.0 in) over the same number of rainy days, coupled with increased humidity at 89%. For a detailed outlook on what to expect, check out Stuttgart weather in November.

September and December present stark contrasts in weather patterns. In September, temperatures range from a mild 1°C (34°F) at night to a warm 29°C (85°F) during the day, offering an average of 15°C (59°F). However, with 48 mm (1.9 in) of precipitation spread over 9 days and a humidity level of 85%, the month can feel quite damp. In contrast, December experiences colder temperatures, dipping as low as -7°C (20°F) at night, with a daily average of 3°C (38°F) and a maximum of only 14°C (58°F). This month sees significantly more rainfall, totaling 97 mm (3.8 in) over 17 days, and higher humidity levels at 91%. For more details on the December climate, you can check Stuttgart weather in December.

Compare Stuttgart's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Stuttgart

As September unfolds in Stuttgart, the weather transitions into a more mild and refreshing phase compared to the hotter summer months. With an average temperature of about 15°C (59°F), the days offer a comfortable reprieve, while occasional warm spells can bring maximums up to 29°C (85°F). However, the month is not without its share of rain, as approximately 48 mm of precipitation graces the city across 9 days, contributing to a notably high humidity level of 85%. This blend of warm days and cooler evenings, along with the likelihood of showers, makes September an ideal time to enjoy Stuttgart's outdoor charms. For a deeper dive into the city's climate patterns, check out Stuttgart Climate.