Last updated: February 26, 2025
September in Frankfurt am Main, Germany presents a vibrant transition into autumn, with temperatures ranging from a refreshing 3°C (38°F) at night to a warm max of 33°C (92°F) during the day. The month features an average temperature of 16°C (62°F), creating a comfortable climate for exploration. Although residents may experience some intermittent rain with a total of 43 mm (1.7 in) of precipitation over 6 days, the humidity stays relatively high at 85%, adding a touch of crispness to the air. This blend of warmth and cool evenings makes September an enchanting time to visit Frankfurt.
As September unfolds in Frankfurt am Main, the city experiences a delightful transition, with temperatures ranging from a minimum of 3°C (38°F) to a comfortable maximum of 33°C (92°F). The average temperature hovers around 16°C (62°F), offering a perfect blend of warmth without the sweltering heat of summer. This month marks a notable decline from the peak summer temperatures seen in July and August, but it still retains enough warmth to enjoy outdoor activities. With clear skies and mild evenings, September provides an ideal backdrop for exploring the vibrant city, making it a favorite among locals and tourists alike.
September in Frankfurt am Main brings a subtle shift in the weather as the summer gives way to autumn. With 43 mm (1.7 in) of precipitation spread across a relatively dry 6 days, this month typically sees less rain compared to the peak summer months of June and July, which average around 73 mm (2.9 in) and 56 mm (2.2 in) respectively. The decline in both precipitation amount and rainy days hints at the transition to the drier season ahead. As Frankfurt moves into October, where rainfall rises to 57 mm (2.2 in), the city feels the cusp of autumn, marking a change in the atmospheric rhythm. Overall, September offers a brief respite from heavier rains, paving the way for the cozy, crisp days of fall.
As September rolls in, Frankfurt am Main experiences a slight uptick in humidity, reaching 85%, which marks a transition from the summer months. Following a gradual decline from 91% in January to a low of 79% in May, humidity levels begin to stabilize in the late summer, hovering around the mid-80s. This trend suggests a lingering warmth in the air, influenced by the remnants of summer, before the cooler, more humid autumn months set in. As the season shifts, residents can expect a subtle increase in humidity, leading into the wetter months of October and November, where levels rise back to 88% and 89%, respectively. This dynamic highlights Frankfurt's climate as it navigates the delicate balance between warm and cool air, giving way to the cozy ambience of fall.
As summer fades and September arrives in Frankfurt am Main, the UV Index drops to a moderate level of 5, a notable decline from the intense heights of 8 in the previous months. This reduction reflects a transition into autumn, where sun exposure becomes more manageable with a burn time of 30 minutes. While it's important to remain vigilant as UV rays can still cause harm, the month offers a comfortable balance for outdoor activities without the overwhelming intensity of summer. Following September, the Index continues to slide into lower levels, signaling the approach of cooler weather. For more detailed insights, check out the Frankfurt am Main UV Index.
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As summer transitions into autumn, September in Frankfurt am Main offers a delightful blend of warmth and light, totaling 319 hours of sunshine. This marks a subtle dip from the sun-drenched July and June, yet it still boasts more sunlight than earlier months like March and April. The sunlit days are becoming shorter, but the lingering warmth of late summer invites outdoor activities and leisurely strolls. As the vibrant colors of fall begin to emerge, residents and visitors alike can relish in the beauty of this transitional month, savoring the last golden rays before the cooler temperatures set in.
As September arrives in Frankfurt am Main, the likelihood of sunny weather sees a notable uptick, with a 42% chance of sunshine gracing the city. This marks a significant improvement from the earlier summer months, where June, July, and August hover around 30-35% sunshine potential. Interestingly, September’s sunny prospects align closely with the spring months of April and March, indicating a transitional phase in weather patterns. While the chances remain lower in the fall months that follow, with October dipping to 31%, September emerges as a relatively bright spot, offering residents and visitors alike a delightful taste of early autumn sunshine.
As summer fades and autumn approaches, September in Frankfurt am Main enjoys a transition marked by 12 hours of daylight. This month witnesses a gradual decrease in sunlight, following the peak of 16 hours in June. While the longer days of May and June usher in vibrant outdoor activities, September brings a gentle shift back toward the shorter daylight hours that herald the approaching fall. The warm glow of early autumn can be enjoyed in the golden hues of the setting sun, offering a perfect opportunity to relish the balance of light that this month provides before the days shorten further into October, which sees only 10 hours of daylight.
As September arrives in Frankfurt am Main, the gentle breeze that characterizes the month becomes apparent, with an average wind speed of 2.2 m/s (5 mph). This is a noticeable dip compared to the more blustery months preceding it, like May, which boasts a lively 3.5 m/s (8 mph). Following the summer's lighter winds in June and July, September reflects a seasonal transition, where the air takes on a calmer demeanor, inviting residents to enjoy the outdoors without the vigor of stronger gusts. As the days grow shorter and hint at the approaching autumn, this serene wind pattern perfectly complements the picturesque scenery of the city's parks and riverbanks.
The weather in Frankfurt am Main 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 Frankfurt am Main and find detailed weather information for every month.
September and January present stark contrasts in weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 33°C (92°F) during the day, with an average of 16°C (62°F). This month experiences relatively low precipitation, with about 43 mm (1.7 inches) over six days and a humidity level of 85%. Conversely, January is much colder, with temperatures dropping significantly, showing a minimum of -10°C (13°F) and a maximum of 13°C (56°F), along with an average temperature of just 3°C (37°F). The month sees increased rainfall, totaling 61 mm (2.4 inches) over 13 days, and even higher humidity at 91%. For more detailed insights into January weather, you can visit Frankfurt am Main weather in January.
In comparing the weather of September and February, one can observe significant contrasts. September typically enjoys a broader temperature range, with minimums of 3°C (38°F) and maximums reaching up to 33°C (92°F), resulting in a comfortable average of 16°C (62°F). This month also sees a relatively low precipitation total of 43 mm (1.7 in) spread over 6 days, allowing for drier conditions despite high humidity at 85%. In stark contrast, February's weather is much colder, with temperatures dropping to a minimum of -11°C (12°F) and an average of just 4°C (40°F). The month is wetter, recording 53 mm (2.1 in) of precipitation across 11 days, accompanied by slightly higher humidity at 89%. For more details on February weather patterns, you can visit Frankfurt am Main weather in February.
When comparing the weather in September and March, we see distinct differences in temperature and precipitation. September boasts a warmer climate, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 33°C (92°F), while March experiences cooler conditions, with temperatures ranging from -10°C (14°F) to a maximum of 22°C (73°F). In terms of precipitation, March tends to be wetter, receiving 69 mm (2.7 in) over 13 days, compared to September's 43 mm (1.7 in) spread across just 6 days. Despite this, both months exhibit high humidity levels, with March at 87% and September at 85%. For more detailed information, you can check Frankfurt am Main weather in March.
September and April present distinct weather patterns, reflecting the transition between summer and autumn versus the shift from winter to spring. In September, temperatures range from a mild 16°C (62°F) to a warm maximum of 33°C (92°F), accompanied by relatively high humidity at 85%. The month experiences about 43 mm (1.7 in) of precipitation over six days. In contrast, April's temperatures are cooler, with a minimum of -4°C (25°F) and an average of 10°C (51°F), peaking at 27°C (80°F). Although April has a slightly lower total precipitation of 36 mm (1.4 in) over seven days, the humidity remains close at 83%. For a more detailed look at what to expect during April, you can check Frankfurt am Main weather in April.
When comparing the weather in September and May, we see notable differences in temperature and precipitation patterns. September typically experiences a broader temperature range, with minimums around 3°C (38°F) and maximums soaring up to 33°C (92°F), resulting in an average temperature of 16°C (62°F). In contrast, May starts off a bit cooler, with minimum temperatures at 0°C (32°F) and averaging around 14°C (58°F) while peaking at 32°C (90°F). Additionally, May tends to be wetter, with an average precipitation of 71 mm (2.8 in) over 11 days, compared to September’s 43 mm (1.7 in) over just 6 days. Humidity levels are also higher in September at 85%, while May has a slightly lower humidity at 79%. For more detailed insights, you can visit Frankfurt am Main weather in May.
September and June show notable differences in weather patterns. In September, temperatures range from a chilly minimum of 3°C (38°F) to a warm maximum of 33°C (92°F), averaging around 16°C (62°F). The month experiences less rainfall, with only 43 mm (1.7 in) over 6 days, and maintains a high humidity level of 85%. Conversely, June presents milder temperatures, ranging from a minimum of 7°C (45°F) to a scorching maximum of 37°C (99°F), with an average of 20°C (68°F). This month is wetter, receiving 73 mm (2.9 in) of precipitation over 10 days, while humidity is slightly lower at 82%. For a more detailed look at June's weather conditions, you can visit Frankfurt am Main weather in June.
When comparing the weather in September and July, distinct differences emerge. September generally experiences cooler temperatures with a minimum of 3°C (38°F) and an average of 16°C (62°F), while July boasts a warmer minimum of 8°C (47°F) and an average of 21°C (70°F). July can reach higher maximum temperatures as well, peaking at 40°C (104°F), compared to September's maximum of 33°C (92°F). In terms of precipitation, July sees slightly more rainfall at 56 mm (2.2 in) over 9 days, while September has 43 mm (1.7 in) over 6 days. Both months have similar humidity levels, with September at 85% and July slightly lower at 83%. For more detailed insights, you can check the Frankfurt am Main weather in July.
In September, the weather starts to cool down, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 33°C (92°F) and an average of 16°C (62°F). This month sees a decrease in average temperature compared to August, which has minimums of 7°C (45°F), averages of 21°C (70°F), and maximums reaching 36°C (97°F). While both months experience high humidity, September's at 85% slightly surpasses August's 84%. Rainfall is also less frequent in September, with 43 mm (1.7 in) spread over 6 days compared to August's 53 mm (2.1 in) over 10 days. For a more detailed look at August weather, visit Frankfurt am Main weather in August.
In September, temperatures range from a minimum of 3°C (38°F) to a maximum of 33°C (92°F), creating a warm atmosphere with an average of 16°C (62°F). The month experiences about 43 mm (1.7 in) of precipitation over roughly six days, with humidity levels at 85%. In contrast, October sees a significant drop in average temperatures to 12°C (53°F) and a maximum of 27°C (81°F), along with colder minimums reaching 1°C (33°F). This month has higher overall precipitation at 57 mm (2.2 in) across approximately 12 days and a slight increase in humidity to 88%. For more detailed weather information, you can explore Frankfurt am Main weather in October.
In comparing the weather between September and November, it's clear that the transition from early autumn to late fall brings notable changes. September features a wider temperature range, with minimums around 3°C (38°F) and maximum highs reaching up to 33°C (92°F), resulting in an average of 16°C (62°F). In contrast, November sees temperatures drop significantly, with minimums falling to -4°C (26°F) and a cooler average of 6°C (43°F). While September averages 43 mm (1.7 in) of precipitation over 6 days, November has slightly higher precipitation at 48 mm (1.9 in) but for more days, totaling 10. Humidity also rises marginally from 85% in September to 89% in November. For a more detailed look at November's weather, you can check Frankfurt am Main weather in November.
September and December present striking contrasts in weather patterns. In September, temperatures range from a mild 3°C (38°F) at night to a warm 33°C (92°F) during the day, with an average of 16°C (62°F). The month sees relatively low precipitation, with around 43 mm (1.7 in) falling over just six days, and humidity levels at 85%. In contrast, December experiences much colder temperatures, dipping as low as -6°C (21°F) and reaching a maximum of 15°C (59°F), with an average of only 4°C (40°F). Precipitation is significantly higher in December, totaling 98 mm (3.9 in) over 17 days, and humidity rises to 91%. For those interested in a more detailed look at December weather, check out Frankfurt am Main weather in December.
As September unfolds in Frankfurt am Main, the city experiences a delightful transition from the warmth of summer to the crispness of autumn. With temperatures that can soar to 33°C, it’s a month that still holds onto the tail end of summer, yet evenings remind us of the approaching cooler months. The humidity hovers at a noticeable 85%, making the air feel heavy on some days, accompanied by a moderate level of precipitation that brings a refreshing touch to the landscape. While the days remain warm, the notable drop in minimum temperatures signals a shift, distinguishing September from the peak summer months. For those interested in exploring the city's climatic nuances, detailed insights are available at Frankfurt am Main Climate.