Last updated: February 26, 2025
In Calw, Germany, September brings a delightful transition into autumn, with maximum temperatures soaring up to 29°C (84°F) during the day, while the average settles around a mild 14°C (58°F). Nights can be chilly, dipping to a refreshing 1°C (34°F). This month experiences approximately 65 mm (2.6 in) of precipitation over 12 rainy days, contributing to a humidity level of 85%, which enhances the lush greenery of the region. Whether you’re exploring the charming streets or enjoying the vibrant fall scenery, September in Calw offers a perfect blend of warmth and a hint of crispness.
September in Calw, Germany, marks a delightful transition into autumn, with temperatures showcasing a significant shift from the balmy summer months. The minimum temperature rests at a brisk 1°C (34°F), while averages climb to a comfortable 14°C (58°F), making early autumn walks particularly enjoyable. Temperatures can still peak at a warm 29°C (84°F), allowing for a lingering taste of summer’s warmth as the leaves begin to change. This month reflects a gradual cooling trend, setting the stage for the crisp air and vibrant colors of fall, while also inviting locals and visitors alike to relish the last remnants of the season’s heat.
September in Calw, Germany, sees a notable shift in precipitation patterns as summer gives way to autumn. With 65 mm (2.6 in) of rainfall spread over 12 days, it marks a decrease from the wetter months of July and August, which each recorded over 100 mm. This trend reflects a gradual decline in rain volumes as the year progresses, particularly after the peak seen in late spring and summer. Interestingly, despite the reduction in total precipitation, September maintains a consistent rainy presence, hinting at the potential for crisp, overcast days ahead. As the region transitions into October, one can't help but appreciate the rhythmic dance of seasons embodied in these shifting weather patterns.
In September, humidity in Calw, Germany settles at a moderate 85%, reflecting a gradual transition as summer fades into autumn. While this is a slight increase from the preceding months of July (83%) and August (84%), it remains lower than the peak levels observed in the winter months. The trend shows a progression from the high humidity of January (91%) through a steady decline during the spring, reaching a low of 79% in May. As the year advances, humidity levels begin to rise again, culminating in the cooler and wetter conditions expected in the autumn and winter, making September a pivotal month that bridges the summer warmth with the onset of a more humid season ahead.
As September arrives in Calw, Germany, the UV Index reflects a transition into the autumn months, showing a moderate to high level of sun exposure with a UV Index of 6. This marks a decrease from the intense summer months of June and July, where values peaked at 9, warranting caution due to very high burn risks. While the burn time extends to 25 minutes in September, it remains essential for residents and visitors to stay mindful of sun safety as the weather remains pleasant. This pattern illustrates a gradual decline in UV radiation, yet highlights the need for protection during the lingering sunny days of early fall. For more detailed information about UV exposure in the region, visit Calw UV Index.
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In September, Calw, Germany, basks in a delightful 318 hours of sunshine, marking a beautiful transition into autumn. As the summer months fade, there's a noticeable drop from the peak of 411 hours in July, yet September retains a generous glow that outshines the chillier months ahead. With daylight still abundant, this month serves as a gentle reminder of summer's lingering warmth, especially when compared to the dimming days of October, which brings only 263 hours of sun. Overall, September stands out as a vibrant bridge between the sun-drenched days of summer and the cooler embrace of fall, encouraging both outdoor adventures and cozy reflections.
In September, Calw, Germany, experiences a promising 46% chance of sunny weather, making it one of the most favorable months for sunshine. This slight uptick in sunny days follows the summer months, where sunshine probabilities hover around the low to mid-30s. As autumn begins to take hold, September stands out as a transitional month, bridging the warmth of late summer with the cooler days ahead. Interestingly, the trend shows a significant rise compared to August's 34%, suggesting that those looking to soak up some sun before the onset of fall should seize the opportunity in this vibrant month.
As summer gives way to fall in Calw, Germany, September marks a notable shift in daylight duration, with the sun gracing the skies for about 12 hours each day. This decrease from the vibrant 15 hours of daylight seen in May and June signals the gradual transition towards the shorter days of autumn. Following the summer's peak, the daylight begins to wane, offering a gentle reminder of the cyclical nature of seasons. October leads further into this trend, bringing only 10 hours of daylight, while November and December continue to dwindle down to just 9 and 8 hours respectively. This rhythmic ebb and flow not only beautifies the landscape but also invites residents to appreciate the rich hues of early autumn before winter's embrace.
As summer fades into autumn in Calw, Germany, September brings a gentle breeze with an average wind speed of 2.0 m/s (5 mph). This marks a noticeable dip from the slightly stronger currents of the spring and summer months, when wind speeds reached their peak, notably in May at 3.6 m/s (8 mph). The gradual decline through the year highlights a seasonal trend, with winds consistently weaker in the latter half, especially from June through September. As the air turns crisp and the landscape transforms into vibrant autumn hues, Calw enjoys the soothing whispers of September’s calm winds, inviting residents and visitors alike to savor the tranquil beauty of the changing season.
The weather in Calw 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 Calw and find detailed weather information for every month.
September and January present a stark contrast in weather conditions. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), with an average of 14°C (58°F), creating a mild and comfortable atmosphere. The month receives about 65 mm (2.6 in) of precipitation over 12 days, coupled with high humidity levels of 85%. In contrast, January features much colder temperatures, ranging from a minimum of -21°C (-6°F) to a maximum of 13°C (56°F), with an average temperature of just 1°C (34°F). The precipitation increases to 92 mm (3.6 in) over 13 days, and humidity rises slightly to 91%. This comparison highlights how September is characterized by warmer days and higher comfort levels, while January brings colder temperatures and a wintry feel. For more details, check out Calw weather in January.
September and February showcase stark differences in weather patterns. September typically features a more moderate temperature range, with minimums around 1°C (34°F) and maximums reaching 29°C (84°F), providing a pleasant average of 14°C (58°F). The month sees about 65 mm (2.6 in) of precipitation over 12 days, accompanied by high humidity levels of 85%. In contrast, February experiences much colder conditions, with temperatures dropping as low as -18°C (1°F) and peaking at 19°C (67°F) for an average of just 3°C (38°F). This month has slightly higher precipitation at 83 mm (3.3 in) over 11 days, coupled with even higher humidity at 89%. For a closer look at February weather specifics, you can check Calw weather in February.
September and March present distinct weather profiles, showcasing the transition between summer and spring. September typically enjoys a mild climate with temperatures ranging from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), while averaging around 14°C (58°F). It sees about 65 mm (2.6 in) of precipitation spread over 12 days, accompanied by high humidity at 85%.
In contrast, March experiences significantly colder temperatures, with a minimum of -19°C (-2°F) and a maximum of 22°C (71°F), averaging just 5°C (42°F). Precipitation increases to 99 mm (3.9 in) over 15 days, and humidity remains high at 87%. This shift in weather not only highlights the chillier start to spring in March but also the gradual warming as summer approaches in September. For more specific information, you can check Calw weather in March.
When comparing the weather in September and April, we see notable differences in temperature and precipitation. September tends to be warmer, with average temperatures around 14°C (58°F) and maximums reaching up to 29°C (84°F), while April has a cooler average of 9°C (49°F) and maximums peaking at 26°C (79°F). Additionally, September experiences more rainfall, with about 65 mm (2.6 in) over 12 days compared to April's 52 mm (2.0 in) over 9 days. Humidity levels are somewhat similar, with September at 85% and April at 83%. For a more detailed look at the specifics, you can refer to Calw weather in April.
In comparing the weather between September and May, one can observe both similarities and differences. Both months experience a maximum temperature of 29°C (84°F), but September has a slightly higher average temperature of 14°C (58°F) compared to May’s average of 13°C (55°F). Notably, September typically starts warmer with a minimum temperature of 1°C (34°F), while May can dip to -1°C (31°F). Precipitation is more prevalent in May, averaging 112 mm (4.4 in) over about 16 days, while September sees less rain with only 65 mm (2.6 in) over 12 days. Additionally, humidity levels are slightly higher in September at 85%, compared to 79% in May. For more detailed information about May's weather, you can check Calw weather in May.
September and June present distinct weather patterns. In September, temperatures range from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), with an average of 14°C (58°F). The month experiences about 65 mm (2.6 in) of precipitation over 12 days, with humidity levels averaging 85%. In contrast, June offers warmer temperatures, with a minimum of 5°C (41°F) and a maximum of 33°C (91°F), resulting in an average temperature of 18°C (65°F). It sees higher rainfall at 114 mm (4.5 in) over 14 days, but slightly lower humidity at 82%. For more detailed comparisons, you can check Calw weather in June.
In comparison, September weather tends to be milder than July's summer heat. While September features an average temperature of 14°C (58°F), July basks in warmer conditions with an average temperature of 19°C (66°F). July also sees higher maximum temperatures, reaching up to 34°C (94°F), compared to September's peak of 29°C (84°F). Precipitation levels are greater in July, with 107 mm (4.2 in) recorded over 14 days, whereas September experiences 65 mm (2.6 in) of rain on 12 days, leading to slightly lower humidity at 85% compared to July's 83%. For more specific insights into the July weather, you can visit Calw weather in July.
In comparing the weather between August and September, it is evident that September experiences cooler temperatures, with a minimum of 1°C (34°F) and an average of 14°C (58°F), compared to August's minimum of 5°C (42°F) and average of 19°C (66°F). August tends to be warmer overall, peaking at a maximum of 34°C (93°F), while September's maximum is relatively lower at 29°C (84°F). Precipitation also varies; August sees more rainfall with 111 mm (4.4 in) over 16 days, compared to September’s 65 mm (2.6 in) across 12 days. Additionally, humidity levels remain high in both months, with September at 85% and August slightly lower at 84%. For more detailed insights, check Calw weather in August.
September typically brings milder temperatures, with a minimum of 1°C and an average of 14°C, peaking at a warm 29°C. In contrast, October cools down significantly, recording a minimum of -1°C and an average of 10°C, with highs reaching 24°C. While September experiences 65 mm of precipitation over 12 days, October sees an increase in rainfall, recording 86 mm across 13 days, along with slightly higher humidity at 88%. For a detailed look at conditions during this time, check Calw weather in October.
September and November present distinct weather patterns, reflecting the transition from summer warmth to autumn chill. In September, temperatures range significantly from a minimum of 1°C (34°F) to a maximum of 29°C (84°F), with an average of 14°C (58°F). The month experiences a decent amount of rainfall, totaling 65 mm (2.6 in) over 12 days, while humidity levels hover around 85%. In contrast, November sees cooler temperatures, with a minimum of -4°C (25°F) and a maximum of 21°C (70°F), averaging just 5°C (41°F). Precipitation remains slightly lower at 62 mm (2.4 in) over 11 days, accompanied by a higher humidity level of 89%. These differences mark November as a month that embraces the crispness of late autumn, compared to the lingering warmth and moisture of September. For more details, you can check this link: Calw weather in November.
September and December present a stark contrast in weather conditions. September enjoys milder temperatures, with a minimum of 1°C (34°F) and an average high of 29°C (84°F), accompanied by relatively lower humidity at 85% and less precipitation (65 mm over 12 days). In contrast, December experiences much colder weather, with temperatures dropping to a minimum of -10°C (15°F) and an average high of only 13°C (56°F). Additionally, December is wetter, receiving 123 mm of precipitation over 18 days and higher humidity at 91%. For more details on the weather specifics in December, check out Calw weather in December.
As September unfolds in Calw, the weather transitions into a blend of moderate temperatures and increased humidity, distinguishing it from the summer months. The days can still see a warm embrace with highs reaching up to 29°C, while cooler nights bring refreshing lows around 1°C. With an average of 85% humidity and about 12 days of rain, the month marks a shift towards more moisture-laden days, making it a time of refreshing changes in the atmosphere. This nuanced weather makes September an intriguing month to experience the beauty of Calw, inviting outdoor exploration amid the early hints of autumn. For a deeper insight into the climate dynamics, check out Calw Climate.