September Weather in Andernach, Germany

Last updated: February 26, 2025

September in Andernach, Germany offers a dynamic weather experience, with temperatures ranging from a crisp 2°C (35°F) at night to a warm 32°C (89°F) during the day. The average temperature settles at a comfortable 15°C (59°F), perfect for outdoor activities. While the month sees 54 mm (2.1 in) of precipitation across about 8 days, the high humidity at 81% can make the afternoons feel quite muggy. Visitors and locals alike can enjoy the early autumn's transition, but it's wise to stay prepared for the occasional rain shower amidst the sunny spells.

September Temperature in Andernach

September in Andernach, Germany, marks a transition from the sweltering summer to the crispness of autumn. With temperatures ranging from a minimum of 2°C (35°F) to a maximum of 32°C (89°F), this month maintains a pleasant average of 15°C (59°F). The days begin to cool down, offering a refreshing reprieve from the peak heat of July and August, which recorded maximum temperatures of up to 38°C (101°F). As the season progresses, the nights grow chillier, hinting at the impending autumn, while the pleasant daytime warmth invites outdoor activities, allowing residents to savor the last whispers of summer before the cooler months set in.

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

The chart illustrates September temperature patterns in Andernach, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec363943495665666659524339
Data source: Temperature data for Andernach 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 Andernach

In September, Andernach experiences a noticeable shift in precipitation, receiving 54 mm (2.1 in) over a mere 8 days. This marks a decline compared to the summer months, reflecting a transition as the region begins to prepare for autumn. While July and August collectively averaged around 79 mm and 70 mm, respectively, September's gentler rains signify a retreat from the wetter season. Interestingly, the drop in rainfall also aligns with fewer precipitation days, suggesting that while rainfall is less frequent, it is still significant enough to nourish the landscape as temperatures cool.

September Precipitation Trends in Andernach

The chart displays monthly precipitation patterns in Andernach, 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.
JanFebMarAprMayJunJulAugSepOctNovDec7265743875747970546649102
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Andernach

September in Andernach, Germany sees a noticeable shift in humidity levels, with an average of 81%. This increase follows the more arid summer months, where humidity dipped to a low of 72% in July. As autumn approaches, residents can expect a gradual rise in moisture in the air, setting the stage for the wetter conditions typical of the fall and winter months. Remarkably, this transition indicates a return to the more humid climate that characterizes the latter part of the year, aligning closely with the 88% in October and even reaching 91% in November. Overall, September marks a pivotal point where the lingering warmth of summer meets the impending chill of autumn, reflected in the humidity that refreshingly wraps around the vibrant landscape of Andernach.

September Average Humidity in Andernach

This chart illustrates the average monthly humidity levels in Andernach, 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%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Andernach

As September rolls into Andernach, Germany, the UV Index settles at a moderate level of 5, allowing for a comfortable outdoor experience. Compared to the very high levels seen in the peak summer months of June and July, which required diligent protection against sunburn with a mere 15 minutes of unprotected exposure, September's burn time extends to 30 minutes. This reflects a gradual transition from summer, where sun safety was paramount, to the softer rays of autumn. The UV Index in September is comparable to the reading in the previous spring months, indicating a stable yet cautious approach to sun exposure as the season shifts. To stay updated on UV levels, check out Andernach UV Index for timely information.

Maximum UV Index Levels in Andernach for September

The chart shows the monthly maximum UV Index (UVI) for Andernach 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.
JanFebMarAprMayJunJulAugSepOctNovDec234578875421
Data source: Andernach 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 Andernach

As September unfolds in Andernach, Germany, the sun graciously graces the region with an impressive 320 hours of sunlight, offering a gentle transition from the vibrant summer months to the cooler autumn days. This marks a slight decline from the peak of 411 hours in July, yet remains a robust contributor to the sunny tapestry that spans from spring to early fall. The gradual decrease in daylight hours throughout the year is evident, with the months leading up to September— from March’s 265 hours to August’s 384 hours—showcasing the steady growth of sunny days. As September arrives, there's an inviting warmth lingering in the air, illuminating the landscape and encouraging outdoor gatherings before the sunlight retreats, welcoming the cozy embrace of fall.

Monthly Sunshine Duration in Andernach: September Highlighted

The September sunshine duration represents the total number of hours Andernach 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.
JanFebMarAprMayJunJulAugSepOctNovDec104h197h265h344h391h396h411h384h320h235h168h114h
Data source: Andernach September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Andernach During September

In September, Andernach, Germany experiences a 39% chance of sunshine, marking a gradual rise from the earlier summer months. While this figure shows a modest improvement compared to the sunniest months of the year, it remains lower than the peak brightness of spring. The transition from the more favorable sunny days of July and August, which each sit around 31%, signifies the onset of autumn, when the daylight starts to wane. Despite the crisper air and shorter days ahead, September still offers a glimmer of warmth and brightness, making it a lovely time to enjoy the shifting scenery in this picturesque town.

Percentage of Sunny Days in September in Andernach

The chart illustrates the percentage of sunny days in Andernach 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 Andernach experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec9%32%42%41%30%31%32%31%39%26%19%13%
Data source: Andernach September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Andernach in September

In Andernach, Germany, the trend of daylight duration takes you through a captivating seasonal journey. As the year begins, January's 8 hours of daylight gradually expands, reaching its peak in June with a glorious 16 hours. This abundance of light allows residents to savor the vibrant beauty of spring and summer, particularly in May's delightful 15 hours. However, come September, daylight begins its gentle retreat to 12 hours, gently hinting at the arrival of autumn. This subtle decline continues into the months ahead, as October and November usher in shorter days with 10 and 8 hours respectively. The cyclical nature of daylight in Andernach not only marks the passage of time but also enriches the community’s connection to the rhythm of the seasons.

Average Daylight Hours in Andernach for September

The chart illustrates the variation in daylight duration in Andernach throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 32m10h 3m11h 55m13h 50m15h 29m16h 21m15h 54m14h 24m12h 33m10h 40m8h 57m8h 3m
Data source: Andernach daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Andernach

As September unfolds in Andernach, Germany, the wind begins to whisper the onset of autumn. With an average wind speed of 2.0 m/s (5 mph), September marks a noticeable decline compared to the breezier summer months. After experiencing more vigorous winds in May and earlier summer, the gentle breeze of September signals a transition—where the vibrant energy of summer diminishes and a calm, serene atmosphere emerges. This pattern of gradually decreasing wind speeds persists through September before picking up again in October, hinting at the seasonal shifts that herald the coming months. Embracing this tranquil wind, Andernach prepares for the enchanting tapestry of autumn that lies ahead.

Average September Wind Speed in Andernach

The chart displays monthly wind speed patterns in Andernach, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.33.43.22.83.42.32.52.72.0 m/s3.32.43.1
Data source: Andernach September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Andernach Compares to Other Months

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

September and January exhibit contrasting weather patterns in terms of temperature and precipitation. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 32°C (89°F), with an average of 15°C (59°F). The month experiences around 54 mm (2.1 in) of precipitation over approximately 8 days, alongside a relatively high humidity of 81%. In contrast, January sees much colder temperatures, with a minimum of -9°C (17°F) and a maximum of 12°C (54°F), averaging just 2°C (37°F). Precipitation increases to 72 mm (2.8 in) spread over 13 days, and humidity rises slightly to 91%. The significant differences in temperature and precipitation highlight the seasonal transition from the warmth of early autumn to the chill of mid-winter. For more details, visit Andernach weather in January.

September and February present contrasting weather conditions. In September, temperatures range from a minimum of 2°C (35°F) to a maximum of 32°C (89°F), with an average of 15°C (59°F). The month brings about 54 mm (2.1 in) of precipitation over approximately 8 days, accompanied by a humidity level of 81%. In stark contrast, February experiences much colder temperatures, with a minimum of -11°C (12°F) and a maximum of 19°C (67°F), averaging 4°C (39°F). This winter month sees greater precipitation at 65 mm (2.6 in), spread across about 13 days, and a higher humidity of 90%. For a detailed look at weather patterns, check Andernach weather in February.

In September, the weather is generally warm and more variable, with temperatures ranging from a chilly 2°C (35°F) at night to a warm 32°C (89°F) during the day. Despite experiencing an average of 15°C (59°F), September typically has about 54 mm (2.1 inches) of precipitation across approximately 8 days, along with a humidity level of 81%.

In contrast, March tends to be much colder, with minimum temperatures dropping to -11°C (12°F) and a maximum of 22°C (72°F). The average temperature is cooler at around 6°C (43°F). This month sees a higher overall precipitation of 74 mm (2.9 inches) spread over about 15 days, leading to a slightly higher humidity level of 87%. For more details on the weather during this month, you can check Andernach weather in March.

September and April present contrasting weather patterns. In September, the temperature ranges from a brisk 2°C (35°F) at its lowest to a warm 32°C (89°F) at its peak, with an average of 15°C (59°F). The month experiences about 54 mm (2.1 in) of precipitation over approximately 8 days and maintains a humidity level of 81%. In contrast, April sees cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 26°C (80°F), averaging at 10°C (49°F). It has lower precipitation at 38 mm (1.5 in) spread over 9 days, coupled with slightly higher humidity at 84%. For more detailed information about the weather in April, visit Andernach weather in April.

In September, temperatures range from a chilly 2°C (35°F) at night to a warm 32°C (89°F) during the day, averaging around 15°C (59°F). The month experiences 54 mm (2.1 in) of precipitation over about 8 days, with a relatively high humidity level of 81%.

In contrast, May offers slightly cooler temperatures, with nighttime lows of 0°C (32°F) and daytime highs reaching 32°C (90°F), but an average of only 13°C (56°F). Rainfall in May is higher at 75 mm (3.0 in) across 12 days, while humidity is a bit lower at 77%.

To explore more about May weather, you can visit Andernach weather in May.

In comparing the weather between September and June, we notice some distinct differences. September presents a wider temperature range, with minimums dropping to 2°C (35°F) while averaging around 15°C (59°F) and peaking at 32°C (89°F). In contrast, June has milder minimum temperatures starting at 7°C (46°F) and generally warmer overall, with an average of 18°C (65°F) and a maximum of 34°C (93°F). Additionally, September experiences slightly less rainfall, totaling 54 mm (2.1 in) over 8 days compared to June's 74 mm (2.9 in) across 11 days. Humidity levels also differ, with September being more humid at 81%, while June is relatively drier at 74%. For more detailed information about the weather in June, you can visit Andernach weather in June.

When comparing the weather in September and July, it's clear that July tends to be warmer overall, with average temperatures reaching 19°C (66°F) and maximums soaring to 38°C (101°F). In contrast, September sees a lower average temperature of 15°C (59°F), with highs of only 32°C (89°F).

July also experiences higher humidity at 72%, while September's humidity rises to 81%, contributing to a more sultry feel as the month progresses. Precipitation is more frequent in July, with rain on 11 days and a total of 79 mm (3.1 in), compared to September's 54 mm (2.1 in) and 8 days of rain. For more detailed information, check out Andernach weather in July.

In comparing the weather of September and August, September experiences a broader temperature range with a minimum of 2°C (35°F) and a maximum of 32°C (89°F), while August stays warmer overall with temperatures ranging from a minimum of 7°C (44°F) to a maximum of 35°C (95°F). The average temperature in August is slightly higher at 19°C (66°F) compared to September's average of 15°C (59°F).

Precipitation is also notable; September sees 54 mm (2.1 in) over 8 days, while August has more rainfall at 70 mm (2.8 in) over 15 days, contributing to a noticeably higher humidity level of 81% in September compared to 71% in August. These differences highlight September’s transitioning weather as summer gives way to autumn. For more details on August weather, check this link: Andernach weather in August.

September tends to be warmer, with average temperatures around 15°C (59°F) and a maximum of 32°C (89°F), making it a month of transition as summer begins to wane. In contrast, October sees a significant drop in temperatures, averaging 11°C (52°F) and reaching a maximum of 25°C (77°F). Both months experience rainfall, but October is wetter, with 66 mm (2.6 in) of precipitation over 13 days compared to September's 54 mm (2.1 in) over 8 days. Additionally, humidity increases slightly in October to 88% from September's 81%, contributing to a cooler and damp feel. For more detailed information, you can visit Andernach weather in October.

In comparing the weather of September and November, September typically presents a much warmer climate, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 32°C (89°F) and an average of 15°C (59°F). In contrast, November sees much cooler temperatures, experiencing a minimum of -3°C (27°F) and a maximum of 20°C (68°F), with an average of 6°C (43°F). While September boasts relatively lower precipitation at 54 mm (2.1 in) over 8 days, November accumulates slightly less precipitation at 49 mm (1.9 in) but over more days, totaling 12. Additionally, November's humidity increases to 91%, compared to September's 81%. For an in-depth look at Andernach's weather during November, visit Andernach weather in November.

In September, the weather is generally warmer, with average temperatures ranging from a minimum of 2°C (35°F) to a maximum of 32°C (89°F), along with 54 mm (2.1 in) of precipitation over about 8 days and a humidity level of 81%. By contrast, December brings a much cooler climate, featuring minimum temperatures that can drop to -5°C (23°F) and an average of just 4°C (40°F), while the maximum temperatures reach only 14°C (58°F). Additionally, December experiences increased precipitation of 102 mm (4.0 in) across 18 days, along with heightened humidity at 92%. For more details on the December weather in this region, check out Andernach weather in December.

Compare Andernach's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Andernach

As summer gradually fades in Andernach, September brings a refreshing shift in weather, blending warmer days with the subtle hints of autumn. With temperatures ranging from pleasantly mild afternoons to cooler nights, this month stands out for its harmonious balance. While rainfall becomes more frequent, averaging eight days of precipitation, the overall atmosphere remains invigorating, characterized by relatively high humidity levels. Whether you're exploring the scenic landscapes or enjoying local festivities, September offers a unique experience distinct from the sweltering heat of July and the crisp chill of October. For more insights into what to expect year-round, visit Andernach Climate.