September Weather in Fehmarn, Germany

Last updated: February 26, 2025

In September, Fehmarn experiences a delightful transition into autumn, with maximum temperatures reaching 24°C (76°F) and an average of 16°C (61°F). The air remains refreshingly crisp, as the minimum temperatures dip to 11°C (52°F). While the island enjoys the beauty of early fall, it also sees some rainfall, with a total precipitation amount of 64 mm (2.5 in) spread over 12 days. Humidity levels hover around 83%, contributing to the island's characteristic charm and lush landscapes. Whether you’re exploring the coastline or soaking in local culture, September on Fehmarn provides a perfect backdrop for a memorable getaway.

September Temperature in Fehmarn

As summer gracefully transitions into fall, September in Fehmarn presents a pleasant climate that invites exploration. With minimum temperatures averaging around 11°C (52°F) and pleasant highs reaching up to 24°C (76°F), this month strikes a vibrant balance between warmth and cool breezes. The average temperature settles at 16°C (61°F), reflecting a significant drop from the highs of August, yet still comfortably warm for outdoor activities. As the days grow shorter and the air begins to crisp, visitors can enjoy the lush landscapes and coastal beauty of this German island, making September a lovely time to witness nature's transition. Whether taking leisurely strolls along the beach or enjoying local festivities, it's a month where summer's warmth lingers just a little longer.

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

The chart illustrates September temperature patterns in Fehmarn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec383739455362646661554741
Data source: Temperature data for Fehmarn 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 Fehmarn

In September, Fehmarn experiences a shift in its weather dynamics, with 64 mm (2.5 in) of precipitation spread over 12 rainy days. This marks a notable transition from the wetter conditions of August, which recorded a substantial 82 mm (3.2 in) of rain across 14 days. As summer gives way to autumn, September's rainfall and frequency of rainy days suggest a gradual increase in instability, paving the way for the much wetter months ahead, particularly October which often sees a dramatic spike with 104 mm (4.1 in). This trend underscores Fehmarn's changing climate, as residents enjoy the last of the milder days before the rainfall becomes more persistent and intense.

September Precipitation Trends in Fehmarn

The chart displays monthly precipitation patterns in Fehmarn, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6254623846577082641046576
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Fehmarn

In September, Fehmarn, Germany experiences a noticeable shift in humidity levels, rising to 83% after the drier months of summer. This spike marks a transition as the air becomes more humid following the consistent 77% readings of July and August. Interestingly, September's humidity is still lower than the winter months, which hover around 90% in January and 89% in February. This trend suggests that while the summer warmth begins to fade, the moisture in the air thickens, setting the stage for the cozy yet damp autumn season. The increasing humidity foreshadows the transition into winter, creating an inviting atmosphere that complements the island's picturesque landscapes.

September Average Humidity in Fehmarn

This chart illustrates the average monthly humidity levels in Fehmarn, 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.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%88%85%80%77%77%77%84%87%89%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Fehmarn

As summer fades into autumn, September's UV Index in Fehmarn, Germany reflects a transition from the peak sun exposure of summer months. With a UV Index of 5, categorized as moderate, the month offers a sweet spot for outdoor activities, requiring a standard burn time of 30 minutes for unprotected skin. This slight decline from the high indices of July and August indicates that while sun safety remains essential, the urgent need for sun protection eases somewhat. It’s a perfect time to enjoy the last warm days of the year without overexposure, making sure to stay informed about the weather. For detailed insights and updates, check out the Fehmarn UV Index.

Maximum UV Index Levels in Fehmarn for September

The chart shows the monthly maximum UV Index (UVI) for Fehmarn 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.
JanFebMarAprMayJunJulAugSepOctNovDec123568765321
Data source: Fehmarn 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 Fehmarn

As the summer months fade, September brings a warm embrace of sunshine to Fehmarn, Germany, with 322 hours of daylight that gracefully bridge the peak of the season and the impending autumn. This month markedly contrasts with the winter chill ahead, showcasing a steady decline in sunshine from the summer's peak—July shines brightest with 436 hours, while October dips down to 251 hours. September's sun allows locals and visitors alike to savor the last days of outdoor activities, with significantly more sunlight than in the colder months, such as November's mere 158 hours. This transitional month serves as a reminder of summer's vitality while gently ushering in the cozy embrace of fall, making it a unique time to experience the beauty of Fehmarn.

Monthly Sunshine Duration in Fehmarn: September Highlighted

The September sunshine duration represents the total number of hours Fehmarn 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.
JanFebMarAprMayJunJulAugSepOctNovDec107h187h270h366h423h434h436h402h322h251h158h116h
Data source: Fehmarn September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Fehmarn During September

When it comes to September in Fehmarn, Germany, the likelihood of sunny weather sits at around 32%—a modest figure that reflects the transitional nature of the month. As summer quietly bows out, September continues a trend from the previous months where sunshine chances exhibit a slight dip compared to June and July's peak. Interestingly, although September's sunshine probability is lower than in spring, it still holds its ground above the winter months, promising opportunities for outdoor enjoyment before the chill of autumn sets in. This time of the year may not boast the highest number of sunlit hours, but with the right planning, visitors can certainly still savor sunny days amidst the cooling breeze.

Percentage of Sunny Days in September in Fehmarn

The chart illustrates the percentage of sunny days in Fehmarn 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 Fehmarn experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec16%28%39%52%33%41%33%38%32%31%16%20%
Data source: Fehmarn September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Fehmarn in September

As summer wanes in September, Fehmarn, Germany experiences a gentle transition into autumn, with daylight lasting around 12 hours. This marks a noticeable decline from the 17 hours seen in June, reflecting the gradual shortening of days that characterizes this time of year. Following the vibrant long days of spring and summer, September's sunlight offers a comfortable balance, encouraging outdoor activities while hinting at the cozy evenings to come. With daylight diminishing steadily, residents and visitors alike can relish the lingering warmth of late summer as they prepare for the crispness of autumn.

Average Daylight Hours in Fehmarn for September

The chart illustrates the variation in daylight duration in Fehmarn throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec7h 56m9h 44m11h 53m14h 6m16h 4m17h 7m16h 33m14h 47m12h 38m10h 26m8h 27m7h 22m
Data source: Fehmarn daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Fehmarn

As September rolls into Fehmarn, Germany, the winds begin to soften slightly, with average speeds dipping to 6.2 m/s (14 mph). This month sits as a graceful transition, following the more robust summer breezes of August, which averaged 6.8 m/s (15 mph). Notably, September’s winds are a precursor to October's resurgence, where speeds elevate to 8.1 m/s (18 mph), indicating an upcoming shift toward the gustier conditions of autumn. Throughout the year, September often serves as a gentle lull between the high summer winds and the brisk gales of fall, maintaining a balance that invites both tranquility and anticipation for what lies ahead.

Average September Wind Speed in Fehmarn

The chart displays monthly wind speed patterns in Fehmarn, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7.57.56.66.96.44.96.16.86.2 m/s8.17.47.7
Data source: Fehmarn September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Fehmarn Compares to Other Months

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

September and January in Fehmarn present two starkly contrasting weather patterns. In September, temperatures range from a cool 11°C (52°F) at night to a pleasant 24°C (76°F) during the day, coupled with a moderate humidity of 83%. The month sees an average of 64 mm (2.5 in) of precipitation spread over 12 days, marking it as a transitional period from summer to autumn. In contrast, January experiences a much colder climate, with temperatures dipping as low as -5°C (24°F) and peaking at only 10°C (50°F). This month is accompanied by slightly less rain, at 62 mm (2.5 in), but it has a higher humidity level of 90% and an increase in rainy days to 13. For more detailed information, you can check Fehmarn weather in January.

In September, the weather is noticeably milder, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 24°C (76°F) and an average of 16°C (61°F). In contrast, February experiences much colder conditions, with temperatures dropping as low as -5°C (23°F) and peaking at just 11°C (53°F), resulting in a much cooler average of 3°C (38°F). While September sees about 64 mm (2.5 in) of precipitation over 12 days, February follows closely with 54 mm (2.1 in) over 10 days; however, February's humidity reaches a higher level at 89% compared to September's 83%. For a more detailed look at February weather in this region, you can check Fehmarn weather in February.

When comparing the weather in September and March, notable differences emerge. September typically boasts milder temperatures, with averages around 16°C (61°F) and highs reaching 24°C (76°F), making it feel much warmer than the March averages, which linger around a cooler 4°C (40°F) with maximums of only 10°C (51°F). While both months see similar precipitation levels—64 mm (2.5 in) in September and 62 mm (2.4 in) in March—the humidity is slightly higher in March at 88%, compared to September's 83%. The number of rainy days is consistent at 12 for both months, but the overall feel is notably different, with March presenting a chillier and more brisk climate. For more detailed insights on March weather, visit Fehmarn weather in March.

In comparing the weather of September and April, we see a significant contrast in temperatures. September typically enjoys a milder climate, with average highs reaching around 24°C (76°F) and lows rarely dropping below 11°C (52°F). In contrast, April is much cooler, with an average high of only 14°C (58°F) and a minimum temperature that can dip to 1°C (34°F). Additionally, September experiences more precipitation, averaging 64 mm (2.5 in) over about 12 days, while April sees less rain, totaling 38 mm (1.5 in) over just 7 days. Despite this slight difference in rainfall, both months maintain high humidity levels, with September at 83% and April slightly higher at 85%. For more details on April weather conditions, you can visit Fehmarn weather in April.

When comparing the weather in September to that of May, notable differences emerge in temperature and precipitation levels. September tends to be warmer, with average temperatures ranging from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), while May's temperatures are cooler, with a range from 5°C (42°F) to 19°C (67°F). Additionally, September experiences more precipitation, averaging 64 mm (2.5 in) over 12 rainy days, compared to May's 46 mm (1.8 in) across 9 rainy days. Humidity levels are relatively similar, with September at 83% and May at 80%. For more details on the weather characteristics of May, you can check Fehmarn weather in May.

In comparing the weather of September and June, both months present mild temperatures, with September experiencing slightly warmer averages. In June, the minimum temperature hovers around 11°C (51°F), with an average of 17°C (62°F) and a maximum of 25°C (78°F). September sees a similar minimum of 11°C (52°F), but an overall slightly lower average of 16°C (61°F) and a maximum of 24°C (76°F). Precipitation is a bit higher in September, reaching 64 mm (2.5 in) over 12 days, compared to June’s 57 mm (2.3 in) over just 8 days. Additionally, September's humidity level is higher at 83%, while June maintains a lower rate of 77%. For a detailed overview, you can check Fehmarn weather in June.

In comparing the weather of September and July, September tends to be slightly cooler, with minimum temperatures averaging 11°C (52°F) compared to July's 13°C (56°F). The average temperature in September is 16°C (61°F), while July sees a warmer average of 18°C (65°F). Maximum temperatures also reflect this trend, reaching 24°C (76°F) in September, contrasted with July’s 27°C (81°F). Both months experience similar levels of precipitation, with September recording 64 mm (2.5 in) over 12 days and July at 70 mm (2.7 in) over 11 days. Humidity is higher in September, averaging 83% compared to 77% in July. For more detailed information on the weather in July, visit Fehmarn weather in July.

In comparing the weather between August and September, it is evident that September experiences cooler temperatures, with a minimum of 11°C (52°F) and an average of 16°C (61°F), compared to August's warmer minimum of 14°C (57°F) and average of 19°C (66°F). The maximum temperatures in September also reach only up to 24°C (76°F), while August sees higher peaks at 28°C (82°F). Additionally, September is slightly wetter, with 64 mm (2.5 in) of precipitation over 12 days, whereas August has 82 mm (3.2 in) of rain over 14 days. Humidity levels are higher in September at 83%, compared to 77% in August. For more detailed insights, you can check Fehmarn weather in August.

In September, temperatures range from a minimum of 11°C (52°F) to a maximum of 24°C (76°F), with an average of 16°C (61°F), creating mild and pleasant conditions. However, with 64 mm (2.5 in) of precipitation over about 12 days and humidity at 83%, some rainy days are to be expected. In contrast, October sees a decline in temperatures, with a minimum of 6°C (42°F) and a maximum of 19°C (66°F), averaging 13°C (55°F). This month is also wetter, with 104 mm (4.1 in) of precipitation spread over 18 days and humidity rising to 87%. For a detailed look at October's conditions, you can visit Fehmarn weather in October.

In September, the weather is notably warmer, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 24°C (76°F) and an average of 16°C (61°F). This month experiences about 64 mm (2.5 in) of precipitation over approximately 12 days, while humidity stands at a comfortable 83%. Conversely, November brings a significant drop in temperature, with minimums falling to 1°C (35°F) and an overall average of 8°C (47°F). The maximum temperature in November reaches only 16°C (61°F), and while precipitation increases slightly to 65 mm (2.6 in) over more frequent rainy days (15 days), humidity also rises to 89%. For a deeper look at November's weather, you can check Fehmarn weather in November.

September and December present a stark contrast in weather conditions. In September, temperatures range from a mild 11°C (52°F) at night to a warmer 24°C (76°F) during the day, with average temperatures around 16°C (61°F). The month experiences 64 mm (2.5 in) of precipitation across 12 days, accompanied by a relatively high humidity level of 83%. In contrast, December brings a significant drop in temperatures, with lows of -2°C (28°F) and highs only reaching 10°C (50°F), averaging at 5°C (41°F). Precipitation increases to 76 mm (3.0 in) over 16 days, and humidity rises to 88%, making it a colder and wetter month. For more details on December weather, you can visit Fehmarn weather in December.

Compare Fehmarn's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Fehmarn

As summer gracefully transitions into autumn, September in Fehmarn offers a delightful mix of mild temperatures and increased humidity, making it distinct from the sweltering heat of the preceding months. With average highs around a comfortable 16°C and occasional peaks reaching up to 24°C, visitors can enjoy pleasant outdoor activities despite the sporadic rainfall. The month sees more frequent precipitation, with around 12 rainy days, which contributes to the lush, vibrant landscape. This shift invites a different kind of charm to the island, where longer, cooler evenings replace the warm summer nights. To discover more about weather patterns throughout the year, visit Fehmarn Climate.