September Weather in Kaiserslautern, Germany

Last updated: February 26, 2025

September in Kaiserslautern, Germany, showcases a striking spectrum of weather, with temperatures ranging from a mild 3°C (38°F) to a sweltering 31°C (88°F). The month averages a comfortable 15°C (59°F), perfect for outdoor activities and exploring the vibrant fall scenery. However, expect some variability as the region experiences 8 days of precipitation, totaling 52 mm (2.1 in), resulting in a humidity level of 85% that often wraps the city in a soft embrace. As summer transitions to autumn, September offers a unique blend of warmth and refreshing rain, making it an intriguing time to experience Kaiserslautern’s charm.

September Temperature in Kaiserslautern

As September rolls in, Kaiserslautern begins to transition into the cooler embrace of autumn. With temperatures ranging from a minimum of 3°C (38°F) to a delightful maximum of 31°C (88°F), the month offers a refreshing balance between the lingering warmth of summer and the crispness of fall. The average temperature settles around 15°C (59°F), providing a comfortable backdrop for outdoor activities amidst the changing leaves. While evenings can be brisk, the daytime sun still offers a pleasant warmth, making September a sweet spot for exploring this charming German city. As the month progresses, one can expect a gradual decline in temperatures that hints at the approaching winter, creating a perfect time to savor both the last moments of summer and the first whispers of autumn.

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

The chart illustrates September temperature patterns in Kaiserslautern, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec353843495665676759514238
Data source: Temperature data for Kaiserslautern 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 Kaiserslautern

In September, Kaiserslautern experiences a noticeable shift in precipitation patterns, with total rainfall measuring 52 mm (2.1 in) spread over just 8 days. This reduction in both amount and frequency marks a departure from the more abundant summer months, yet it still sets the stage for the wetter autumn ahead. Following a peak in June with 83 mm of rain, September serves as a transitional month, offering just enough moisture to prepare the landscape for October’s anticipated increase to 59 mm. The comparatively dry conditions of September reflect a broader trend of descending precipitation levels as summer fades, making way for autumn’s gradual return.

September Precipitation Trends in Kaiserslautern

The chart displays monthly precipitation patterns in Kaiserslautern, 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.
JanFebMarAprMayJunJulAugSepOctNovDec6065703777847262525956100
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Kaiserslautern

As September arrives in Kaiserslautern, Germany, the humidity levels settle at 85%, reflecting a slight increase from the summer months. After a gradual decline from the peak 91% in January to a lower 79% in May, the trend reverses slightly with the onset of autumn. This subtle rise in humidity signifies the transition from the warmer summer days to the cooler, crisper air of fall. While still moderate, the September humidity sets the stage for a season where sweater weather begins to reign, hinting at the approaching cooler months that typically bring higher humidity levels, peaking again around 88% in October.

September Average Humidity in Kaiserslautern

This chart illustrates the average monthly humidity levels in Kaiserslautern, 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 Kaiserslautern

As summer transitions into autumn in Kaiserslautern, Germany, the UV Index sees a decline, yet remains significant in September with a value of 6, categorizing it as high. This slight decrease from the peak summer months reflects the changing intensity of the sun, allowing for a burn time of 25 minutes before protective measures are necessary. The consistent pattern of high UV levels from May through August indicates that as the season shifts, residents and visitors should remain mindful of sun exposure, particularly during mid to late summer when the risk was at its highest. Therefore, while the UV Index is lower than in the height of summer, vigilance is still essential as the weather becomes cooler but the sun's rays remain potent. For more details on UV trends throughout the year, visit Kaiserslautern UV Index.

Maximum UV Index Levels in Kaiserslautern for September

The chart shows the monthly maximum UV Index (UVI) for Kaiserslautern 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.
JanFebMarAprMayJunJulAugSepOctNovDec234689876421
Data source: Kaiserslautern 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 Kaiserslautern

September in Kaiserslautern, Germany, is a month where the brilliance of summer begins to wane, yet still boasts an impressive 320 hours of sunshine. This marks a delightful segue from the sun-drenched heights of summer, with July leading the pack at 414 hours. As the seasons transition, September retains a significant amount of sunlight compared to the lower counts in autumn months like October with 246 hours and November with 173 hours. The gradual decline in sunshine hours from the peak of summer suggests a season of both warmth and crispness, making September an ideal time for outdoor activities before the shorter days of fall settle in. Embrace this vibrant month as it bridges the warmth of summer and the cool embrace of autumn.

Monthly Sunshine Duration in Kaiserslautern: September Highlighted

The September sunshine duration represents the total number of hours Kaiserslautern 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.
JanFebMarAprMayJunJulAugSepOctNovDec116h201h268h346h391h401h414h387h320h246h173h128h
Data source: Kaiserslautern September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Kaiserslautern During September

As summer winds down, September in Kaiserslautern offers a notable 44% chance of sunny weather, making it one of the more promising months for enjoying the outdoors. This figure represents a slight increase compared to the summer months, reflecting a transitional period where the lingering warmth of August begins to wane. Notably, the month stands out against the backdrop of the year's earlier months, like January's meager 11% and February’s 35%. While the chances of sunshine dip again in October, September's favorable forecast encourages both locals and visitors to relish the last traces of summer before the autumn chill sets in.

Percentage of Sunny Days in September in Kaiserslautern

The chart illustrates the percentage of sunny days in Kaiserslautern 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 Kaiserslautern experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec11%35%45%47%30%31%37%29%44%30%20%13%
Data source: Kaiserslautern September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Kaiserslautern in September

As September rolls into Kaiserslautern, daylight begins to wane, offering a transitional glimpse into the changing seasons. With an average of 12 hours of daylight, this month stands as a bridge between the long, sunlit days of summer and the shorter, cozier hours of autumn. Following the peak of 16 hours in June, daylight gradually declines, yet September retains a comforting glow, providing ample time for outdoor activities and autumnal exploration. As the month unfolds, the diminishing hours signal the approach of October's 10-hour daylight, inviting residents to savor the last warm hues of summer before embracing the crispness of fall.

Average Daylight Hours in Kaiserslautern for September

The chart illustrates the variation in daylight duration in Kaiserslautern throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 40m10h 7m11h 55m13h 46m15h 22m16h 11m15h 45m14h 19m12h 32m10h 42m9h 4m8h 12m
Data source: Kaiserslautern daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Kaiserslautern

As summer gracefully gives way to autumn, September in Kaiserslautern greets us with a gentle breeze, averaging a modest 2.4 m/s (5 mph). This shift in wind speed reflects a noticeable trend, as the month experiences one of the calmest winds of the year, just like June. Following the summer’s more energetic gusts, which peak in May at 4.0 m/s (9 mph), September’s tranquil air sets the stage for the cozy, reflective mood of fall. As the world around starts to change color, the subdued winds invite a slower pace, perfect for enjoying the crisp, pleasant days ahead.

Average September Wind Speed in Kaiserslautern

The chart displays monthly wind speed patterns in Kaiserslautern, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.43.43.14.02.42.83.02.4 m/s3.12.83.3
Data source: Kaiserslautern September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Kaiserslautern Compares to Other Months

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

September and January present a stark contrast in weather patterns. In September, temperatures range from a mild 3°C (38°F) during the night to a warm average of 15°C (59°F), peaking at a comfortable 31°C (88°F) during the day. The month experiences approximately 52 mm (2.1 in) of rainfall over about 8 days, with humidity levels hovering around 85%. In comparison, January brings a chillier climate with temperatures dipping as low as -11°C (13°F) and averaging only 2°C (35°F), with a maximum of 12°C (54°F). It is a wetter month with 60 mm (2.4 in) of precipitation spread over roughly 12 days and higher humidity at 91%. For more information on January weather patterns, check out this link: Kaiserslautern weather in January.

September and February present markedly different weather patterns. In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 31°C (88°F), with an average of 15°C (59°F), making it a generally warmer month. In contrast, February experiences much colder temperatures, ranging from a minimum of -11°C (13°F) to a maximum of 18°C (65°F), with an average of only 4°C (39°F). Rainfall is somewhat similar, with September receiving 52 mm (2.1 in) over 8 days and February receiving 65 mm (2.6 in) over 11 days, though February tends to have higher humidity at 89% compared to September’s 85%. For a deeper look into February's weather, you can refer to Kaiserslautern weather in February.

September and March offer distinctly different weather experiences. In September, temperatures range from a mild 3°C (38°F) at night to a warm 31°C (88°F) during the day, averaging around 15°C (59°F). The month tends to be relatively humid with 85% humidity and experiences about 52 mm (2.1 in) of precipitation over approximately 8 days. In contrast, March presents chillier conditions, with nighttime lows dipping to -11°C (13°F) and daytime highs reaching only 22°C (71°F), averaging 6°C (43°F). This month sees more rain, totaling 70 mm (2.8 in) over about 13 days, and slightly higher humidity at 87%. For a closer look at March weather specifics, check out Kaiserslautern weather in March.

When comparing the weather in September and April, we see distinct differences in temperature and precipitation patterns. September typically experiences milder temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 31°C (88°F), with an average of 15°C (59°F). In contrast, April tends to be cooler, with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 27°C (80°F) and an average of 10°C (50°F). Precipitation in September is slightly higher at 52 mm (2.1 in) compared to April's 37 mm (1.5 in), although both months have roughly the same number of rainy days, at 8. Moreover, humidity levels are quite comparable, with September at 85% and April at 83%. For more detailed information about April conditions, you can refer to Kaiserslautern weather in April.

When comparing September and May weather, both months exhibit similar maximum temperatures, peaking at 31°C (88°F). However, September generally showcases a wider temperature range, with a minimum of 3°C (38°F) and an average of 15°C (59°F), compared to May's minimum of 1°C (33°F) and average of 13°C (56°F). Additionally, September experiences slightly lower precipitation levels at 52 mm (2.1 in) over 8 days, while May sees more rainfall at 77 mm (3.0 in) across 13 days. Humidity levels are elevated in September at 85%, compared to 79% in May, indicating a slightly more comfortable atmosphere in May. For more detailed insights, you can check out Kaiserslautern weather in May.

When comparing the weather in September to that of June, there are some notable differences. September enjoys a wider temperature range, with lows dipping to 3°C (38°F) and highs reaching up to 31°C (88°F), while June maintains a milder minimum of 7°C (45°F) and a maximum of 35°C (94°F). June experiences more precipitation, totaling 83 mm (3.3 in) over 12 days, compared to September’s 52 mm (2.1 in) over 8 days. Humidity levels are similar, with September at 85% and June slightly lower at 82%. For a more detailed look, you can check out Kaiserslautern weather in June.

In comparing the weather of September and July, we see notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums dropping to 3°C (38°F) and maximums reaching 31°C (88°F), offering a pleasant average of 15°C (59°F). In contrast, July is warmer overall, with minimum temperatures around 7°C (46°F) and a higher average of 19°C (67°F), peaking at a sweltering 37°C (98°F). Additionally, July tends to receive more rainfall, totaling 72 mm (2.8 in) over 11 days compared to September's 52 mm (2.1 in) across 8 days. Humidity remains relatively consistent, with July at 83% and September slightly higher at 85%. For a closer look at the weather specifics for July, you can visit Kaiserslautern weather in July.

In comparing the weather between September and August, September tends to be slightly cooler, with minimum temperatures dropping to 3°C (38°F) compared to August's 6°C (42°F). The average temperature in September is also lower at 15°C (59°F), while August boasts a warmer average of 19°C (67°F). Despite these cooler temperatures, September can still reach a maximum of 31°C (88°F), closely resembling August's hotter peak of 34°C (93°F). Precipitation is a bit higher in August, with 62 mm (2.4 in) over 13 days, compared to September's 52 mm (2.1 in) spread over 8 days, and humidity remains relatively high in both months, with September at 85% and August at 84%. For more detailed insights, you can check Kaiserslautern weather in August.

September typically offers a more varied temperature range, with nighttime lows around 3°C (38°F) and daytime highs reaching up to 31°C (88°F), resulting in an average of 15°C (59°F). However, it also experiences a significant amount of humidity at 85%, alongside moderate rainfall of 52 mm (2.1 in) over about 8 days. In contrast, October sees cooler temperatures overall, with a minimum of 1°C (34°F) and an average of 11°C (52°F), peaking at a maximum of 24°C (76°F). While rainfall increases slightly to 59 mm (2.3 in) over 12 days, humidity rises to 88%, creating a distinctly wetter atmosphere. For more details, check out Kaiserslautern weather in October.

In September, the weather is generally warm, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 31°C (88°F) and an average of 15°C (59°F). The month experiences moderate precipitation of 52 mm (2.1 in) over about 8 days, with humidity levels around 85%.

In contrast, November brings much cooler temperatures, with a minimum of -3°C (27°F) and a maximum of 20°C (68°F), resulting in a lower average of 5°C (42°F). Although the precipitation slightly increases to 55 mm (2.2 in) over 11 days, the humidity rises to 89%, making it feel quite damp. For more detailed weather insights, you can visit Kaiserslautern weather in November.

In September, temperatures fluctuate significantly, with minimums around 3°C (38°F) and maximums reaching up to 31°C (88°F). The average temperature sits at a mild 15°C (59°F), and the month experiences relatively moderate precipitation of 52 mm (2.1 in) over about 8 days, coupled with high humidity at 85%.

In contrast, December brings a sharper decline in temperature, with nightly lows dipping to -6°C (22°F) and daytime highs only reaching around 13°C (56°F). The average temperature drops to a chilly 3°C (38°F), while precipitation nearly doubles to 100 mm (3.9 in) occurring over 18 days, contributing to an increase in humidity to 91%. For a more in-depth look at weather trends, check out Kaiserslautern weather in December.

Compare Kaiserslautern's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Kaiserslautern

As September unfolds in Kaiserslautern, it brings a gentle transition from the warmth of summer to the crispness of autumn. With warm maxima and a comfortably mild average temperature, the month sets itself apart from the hotter summer months, inviting residents and visitors alike to enjoy outdoor activities before winter sets in. However, the increased humidity and occasional rainfall, with a few days of precipitation, remind us that the shifting seasons can also bring variability. This makes September a month of dynamic weather patterns, perfect for experiencing the region's lush landscapes. For a deeper dive into what to expect throughout the year, check out Kaiserslautern Climate.