September Weather in Konstanz, Germany

Last updated: February 26, 2025

In September, the charming city of Konstanz, Germany, experiences a delightful mix of mild and warm temperatures. With a maximum reach of 28°C (82°F) and an average hovering around 15°C (60°F), visitors can enjoy pleasant outdoor activities. However, temperatures can dip as low as 4°C (40°F) at night. This month also brings about a total precipitation of 93 mm (3.7 in) across approximately 11 days, contributing to the region's lush landscape. The humidity level remains relatively high at 83%, making for a refreshing, albeit occasionally damp, experience as summer transitions into autumn. Whether strolling along the shores of Lake Constance or exploring the historic old town, September offers a captivating atmosphere for all.

September Temperature in Konstanz

In September, Konstanz experiences a pleasant transition from the summer heat, with temperatures ranging from a minimum of 4°C (40°F) to a comfortable average of 15°C (60°F) and a maximum that can reach up to 28°C (82°F). This month marks a notable drop from the peak summer warmth of August, yet it retains a warm pulse, making it ideal for outdoor pursuits. As the city begins to embrace autumn, the temperature trends suggest that while the days remain mild and inviting, cooler evenings hint at the changing season. With such a balance, September serves as a beautiful bridge from the vibrant summer months into the refreshing ambiance of fall in Konstanz.

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

The chart illustrates September temperature patterns in Konstanz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec343742505666686760514137
Data source: Temperature data for Konstanz generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Konstanz

In September, Konstanz experiences a moderate precipitation level of 93 mm (3.7 in), falling on approximately 11 days. This month marks a continuation of the wet summer, with rainfall tapering slightly compared to the preceding month of August, which recorded a peak of 143 mm (5.6 in). Interestingly, while September shares similar precipitation amounts with October's 96 mm (3.8 in), it benefits from fewer rainy days, suggesting that the rain might come in heavier bursts. As the seasons shift toward autumn, this pattern indicates a gradual transition, with the cooler, crisper air beginning to redefine the landscape of this scenic German city.

September Precipitation Trends in Konstanz

The chart displays monthly precipitation patterns in Konstanz, 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.
JanFebMarAprMayJunJulAugSepOctNovDec87728061124139111143939659111
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Konstanz

As we transition into September, the humidity in Konstanz, Germany settles at a comfortable 83%. This marks a subtle rise from the drier summer months, where humidity levels dipped to 80% in both May and August. Notably, September's readings reflect a slight uptick compared to the preceding months and hint at the more humid conditions that dominate the late autumn and winter seasons, with October and November recording higher figures around 90%. This trend suggests that as summer warmth begins to wane, the air retains more moisture, setting the stage for the cooler, wetter months ahead.

September Average Humidity in Konstanz

This chart illustrates the average monthly humidity levels in Konstanz, 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.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Konstanz

As September rolls into Konstanz, Germany, the UV Index settles at 6, indicating a high level of sun exposure. This seasonal shift reflects a gradual decrease from the intense summer months, where July and June both showcased an intense UV reading of 9, categorized as very high. While the burn time extends slightly to 25 minutes, compared to the blistering 15 minutes of the peak summer months, it's important for residents and visitors alike to remain vigilant about sun protection. Following September, the UV Index dips further in October, mirroring the transition towards autumn. For those planning their outdoor activities, staying informed about the UV levels is essential; you can find more information at Konstanz UV Index.

Maximum UV Index Levels in Konstanz for September

The chart shows the monthly maximum UV Index (UVI) for Konstanz 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: Konstanz 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 Konstanz

As summer wanes and autumn approaches, September in Konstanz, Germany, offers a delightful mix of warmth and beauty, with 315 hours of sunshine lighting up the days. This marks a slight decline from the sun-drenched peak of July, which basks in a glorious 404 hours, yet remains significantly brighter than the colder months ahead. May and June showcase a robust stretch of sunny days, but September retains a comforting glow, perfect for enjoying the city's picturesque lakeside or vibrant parks. As the landscape transitions into autumn hues, the lingering sunlight invites both locals and visitors to relish in the last moments of the warm season, before the days shorten dramatically in October.

Monthly Sunshine Duration in Konstanz: September Highlighted

The September sunshine duration represents the total number of hours Konstanz 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.
JanFebMarAprMayJunJulAugSepOctNovDec150h218h287h349h356h378h404h372h315h269h200h168h
Data source: Konstanz September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Konstanz During September

In September, Konstanz experiences a notable 43% chance of sunny weather, which marks a continuation of the slowly increasing trend seen from the previous months. While January kicks off the year with only 14% probability of sunshine, there’s a gradual rise through spring, peaking at 47% in April. The summer months present varying figures, with July and August hovering around 33% to 34%. As autumn approaches, September revisits the sunnier disposition reminiscent of late spring, providing a pleasant backdrop for outdoor activities. However, the likelihood of sunshine diminishes as the year progresses, plunging to 18% by November and December, making September a delightful option for those seeking to bask in the sun before winter sets in.

Percentage of Sunny Days in September in Konstanz

The chart illustrates the percentage of sunny days in Konstanz 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 Konstanz experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec14%39%43%47%34%35%33%34%43%31%18%18%
Data source: Konstanz September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Konstanz in September

As summer fades into autumn, September in Konstanz, Germany, offers a gentle transition with 12 hours of daylight. This decline marks a notable decrease from the 15 hours enjoyed during the peak summer months, yet it still provides a generous amount of sunlight compared to the earlier months of the year. The increase from 8 hours in January to the vibrant 15 hours in May and June showcases the lengthening days leading into summer. As September progresses, residents and visitors can savor the lingering warmth and brilliant sunsets, reminding us that while daylight may be on the wane, the beauty of the season persists. This gradual ebb of sunlight sets the stage for the brisk, shorter days of October and November, which follow the harvest of summer, inviting reflection and cozy gatherings as the year begins to draw to a close.

Average Daylight Hours in Konstanz for September

The chart illustrates the variation in daylight duration in Konstanz throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 52m10h 14m11h 55m13h 40m15h 9m15h 55m15h 31m14h 11m12h 31m10h 47m9h 15m8h 27m
Data source: Konstanz daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Konstanz

As September rolls into Konstanz, the gentle breeze marks a shift in the season, with an average wind speed of 1.9 m/s (4 mph), making it the calmest month of the year. This subtle decline in wind intensity is a stark contrast to the more spirited gales of May, which boasts an average of 3.3 m/s (7 mph). Throughout the summer, the winds remain relatively mild, hovering between 2.0 m/s (4 mph) and 2.2 m/s (5 mph), reflecting a serene atmosphere that invites leisurely strolls along the lakeshore. However, as autumn approaches, the gradual drop in wind speed this month hints at the coming chill, while ensuring that the ambiance remains tranquil yet vibrant, perfect for enjoying the breathtaking fall colors that Konstanz is known for.

Average September Wind Speed in Konstanz

The chart displays monthly wind speed patterns in Konstanz, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.92.42.52.63.32.02.12.21.9 m/s2.12.32.5
Data source: Konstanz September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Konstanz Compares to Other Months

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

September and January present strikingly different weather patterns. In September, temperatures range from a mild 4°C (40°F) at night to a warm 28°C (82°F) during the day, with an average of 15°C (60°F). The month experiences around 93 mm (3.7 in) of precipitation over approximately 11 days, while humidity hovers at 83%. In contrast, January is much colder, with temperatures dropping to a minimum of -10°C (14°F) and only reaching a maximum of 14°C (57°F). The average temperature is just 1°C (34°F), and despite slightly lower precipitation at 87 mm (3.4 in), it also sees rain on about 11 days, accompanied by higher humidity at 92%. To learn more about the January climate, you can visit this link: Konstanz weather in January.

When comparing the weather in September and February, significant contrasts emerge. September typically boasts warmer temperatures, with a minimum of 4°C (40°F) and an average of 15°C (60°F), reaching a maximum of 28°C (82°F). In contrast, February is much colder, with temperatures plummeting to a minimum of -11°C (13°F) and an average of just 3°C (38°F), though it can still peak at 18°C (64°F). Precipitation levels are somewhat similar, with September experiencing 93 mm (3.7 in) over 11 days, while February has 72 mm (2.8 in) over 12 days. Additionally, February exhibits higher humidity at 89%, compared to September's 83%. For more details, you can check Konstanz weather in February.

In comparing the weather between September and March, it's clear that September enjoys significantly warmer temperatures, with a minimum of 4°C (40°F) and an average of 15°C (60°F), reaching up to a maximum of 28°C (82°F). In contrast, March sees much cooler temperatures, with a minimum of -11°C (12°F) and an average of 6°C (42°F), peaking at 20°C (68°F). While September receives about 93 mm (3.7 in) of precipitation over 11 days, March experiences slightly less at 80 mm (3.1 in) across 16 days, indicating a more frequent but lighter rain. Additionally, humidity levels are slightly higher in March at 87%, compared to 83% in September. For more detailed information, you can check Konstanz weather in March.

In comparing the weather of September and April, we notice a distinct shift in temperature and precipitation patterns. September boasts a broader temperature range, with minimums of 4°C and maximums reaching up to 28°C, resulting in an average of 15°C. Meanwhile, April starts out chillier, with a minimum temperature of -3°C, and averages 10°C, peaking at 25°C. Precipitation is slightly higher in September at 93 mm over 11 days compared to April's 61 mm over 9 days, although both months experience similar humidity levels, with September at 83% and April at 84%. For more details on April weather specifically, you can visit Konstanz weather in April.

September and May present distinct weather patterns, showcasing the transition from summer to early autumn. In September, temperatures range from a minimum of 4°C (40°F) to a maximum of 28°C (82°F), with an average temperature of 15°C (60°F). The month sees about 93 mm (3.7 in) of precipitation over 11 days and has a relatively high humidity of 83%. In contrast, May experiences slightly cooler conditions, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 29°C (85°F), averaging 14°C (57°F). This month is wetter, with 123 mm (4.9 in) of rainfall spread across 16 days and a humidity level of 80%. For a detailed overview, visit Konstanz weather in May.

In comparing the weather of September and June, June typically boasts warmer temperatures, with a minimum of 8°C (47°F) and an average of 19°C (66°F), contrasted with September's cooler minimum of 4°C (40°F) and an average of 15°C (60°F). The maximum temperatures in June can reach up to 33°C (92°F), making it substantially hotter than September's peak of 28°C (82°F). However, June also experiences more precipitation, averaging 139 mm (5.5 in) over 14 days, while September has slightly lower precipitation levels at 93 mm (3.7 in) over 11 days. Both months feature high humidity, with September at 83% and June at 82%. For further details on June weather patterns, you can visit Konstanz weather in June.

When comparing the weather in September and July, we see notable differences in temperature and precipitation. September experiences cooler temperatures with a minimum of 4°C (40°F) and an average of 15°C (60°F), while July is warmer, with a minimum of 10°C (50°F) and an average of 20°C (68°F). The maximum temperatures in July can reach up to 33°C (92°F), compared to September's maximum of 28°C (82°F). Both months have similar humidity levels at 83%, but July receives slightly more precipitation, totaling 111 mm (4.4 in) over 16 days, compared to September’s 93 mm (3.7 in) over 11 days. For a closer look at July weather, you can refer to Konstanz weather in July.

September's weather is notably cooler than August's, with minimum temperatures dropping from 9°C (48°F) in August to a chilly 4°C (40°F) in September. The average temperature also reflects this change, decreasing from 20°C (68°F) in August to 15°C (60°F) in September. While August enjoys warmer days, reaching a maximum of 34°C (93°F), September only peaks at 28°C (82°F). Precipitation levels in September are slightly lower, with 93 mm (3.7 in) over 11 days, compared to August’s 143 mm (5.6 in) over 15 days. Interestingly, humidity remains relatively high in both months, with September at 83% and August at 80%. For a more detailed look at August's weather, you can visit Konstanz weather in August.

In comparing the weather between September and October, we see a noticeable shift in temperature and humidity levels. September generally boasts warmer temperatures, with minimums around 4°C (40°F) and maximums reaching 28°C (82°F), while October brings cooler conditions, with minimums dipping to 2°C (36°F) and a peak of 22°C (72°F). Precipitation remains relatively consistent between the months, with September recording 93 mm (3.7 in) over 11 days and October slightly higher at 96 mm (3.8 in) over 13 days. Furthermore, October’s humidity rises to 90%, compared to September's 83%, contributing to a noticeably damp atmosphere. For more detailed insights, check out this link: Konstanz weather in October.

September weather features a broader range of temperatures, with minimums around 4°C (40°F) and maximums reaching up to 28°C (82°F), providing generally pleasant days. In contrast, November sees much cooler temperatures, with a minimum dropping to -2°C (29°F) and a modest maximum of 19°C (66°F), resulting in an average temperature of just 5°C (42°F). While both months experience around 11 days of precipitation, November is drier with only 59 mm (2.3 in) compared to September’s 93 mm (3.7 in). Additionally, humidity levels are slightly higher in November at 88%, compared to 83% in September. For a detailed overview of November weather, you can visit Konstanz weather in November.

In September, the weather typically showcases a more moderate temperature range, with minimums around 4°C (40°F) and maximums peaking at 28°C (82°F), averaging a comfortable 15°C (60°F). The month experiences around 93 mm (3.7 in) of precipitation across 11 days, with humidity levels at 83%. In contrast, December brings a chillier climate, where minimum temperatures drop to -4°C (26°F) and average only 3°C (37°F), with highs reaching 13°C (56°F). Precipitation increases slightly to 111 mm (4.4 in), spread over 18 days, and humidity rises to 90%. For more details on December weather specifics, check out Konstanz weather in December.

Compare Konstanz's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Konstanz

As summer gracefully transitions into autumn, September in Konstanz showcases a unique blend of warmth and coolness. While days can still reach a pleasant maximum of 28°C, the average temperature settles around a comfortable 15°C, signaling a shift in the season. The increased humidity at 83% coupled with 93 mm of precipitation over 11 days brings a refreshing change, making this month distinctly wetter than its warmer predecessor. As the lush landscapes transform, September presents a perfect opportunity to experience the serene beauty and vibrant colors of the area. For a more detailed overview of the climate in this picturesque location, visit Konstanz Climate.