Last updated: August 27, 2025
In September, Flims, Switzerland experiences a delightful blend of autumnal charm and unpredictable weather. With average temperatures hovering around 9°C (48°F), peaking at 21°C (70°F) on pleasant days, visitors are treated to a range of climates ideal for outdoor activities. However, be prepared for brisk evenings, where temperatures can dip as low as -10°C (15°F). This month brings an average of 152 mm (6.0 in) of precipitation spread over 15 days, creating a lush, vibrant landscape but also a need for rain gear. With humidity levels at a comfortable 83%, the crisp air adds to the invigorating atmosphere, inviting both adventure and relaxation in this stunning alpine setting.
September in Flims, Switzerland, marks a stunning transition as summer begins to wane, giving way to the crispness of autumn. With temperatures ranging from a chilly -10°C (15°F) at night to a delightful 21°C (70°F) during the day, visitors can expect pleasant weather perfect for outdoor adventures. The average temperature settles around 9°C (48°F), providing a comfortable backdrop for exploring the scenic landscapes. This month serves as a bridge between the warm, sun-soaked days of summer and the brisk chill of fall, making it an ideal time for hiking, enjoying the changing foliage, or simply soaking in the breathtaking alpine views. As September unfolds, the cooling temperatures begin to hint at the wintry splendor that awaits in the months to follow.
In September, Flims, Switzerland, experiences a robust precipitation total of 152 mm (6.0 in), marking it as one of the wetter months of the year. This is accompanied by an average of 15 rainy days, indicating a transition from the summer's heavy downpours—most notably August, which saw a peak of 234 mm (9.2 in). As the region shifts into autumn, September's rainfall remains substantial yet reveals a slight decrease compared to the summer months. The pattern illustrates a gradual tapering of precipitation, hinting at a forthcoming shift towards drier, cooler days in October. Overall, September serves as a pivotal month, bridging the flourishing wetness of summer with the approaching crispness of fall.
In September, Flims, Switzerland, experiences a humidity level of 83%, reflecting a slight rise from the summer months. As the year transitions from the warm embrace of summer into the cooler autumn, the humidity remains relatively high, similar to July and August. This trend showcases a gradual decrease from the peak of 92% in January, while still retaining a consistent moisture level through the seasonal changes. Following September, the humidity is set to increase again in October and December, which highlights the region's characteristic damp winters. Overall, the humidity trend in Flims illustrates a balance between the lingering warmth of summer and the approaching chill of autumn.
In September, the UV Index in Flims, Switzerland begins to taper off after the intense summer months, settling at a moderate 7, which falls into the high exposure category. This means that while the sun is less intense than in July and August's peak, it still carries significant strength, with a burn time of 25 minutes. As autumn approaches, residents and visitors alike should continue to practice sun safety, especially during midday hours. September marks a transition, reminding us to enjoy the lingering warmth while being mindful of UV exposure. For more detailed information, visit Flims UV Index.
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As summer gracefully transitions into fall, September in Flims, Switzerland offers a delightful blend of sun and serenity, boasting 302 hours of sunshine. This month mirrors the vibrant light of August, yet hints at the cooler days ahead, showcasing a gradual decline from the peak summer radiance of 404 hours in July. The sustained sunshine of September invites outdoor enthusiasts to savor the breathtaking Alpine landscapes while enjoying the crisp mountain air. As the year progresses, sunny days wane, with October bringing a gentle drop to 270 hours, but September’s warm glow lingers, making it a perfect time to explore the majestic trails and serene lakes before the onset of winter.
In September, Flims, Switzerland enjoys a 33% chance of sunny weather, marking a slight increase compared to the summer months when the likelihood plateaued around 27% for July and August. This upward trend suggests that as the region transitions into autumn, there's a refreshing possibility of brighter days amidst the cooling temperatures. While September's sunshine is not guaranteed, it offers a lovely opportunity for visitors to experience the beauty of the Swiss landscape bathed in early fall sunlight, making this charming town a delightful choice for outdoor adventures. With the sun shining one in three days on average, this month strikes a balance between the lingering warmth of summer and the crispness of autumn, inviting both thrill-seekers and nature lovers alike.
As summer fades, September in Flims, Switzerland welcomes a gentle tapering of daylight, with the sun gracing the skies for about 12 hours each day. This month reflects a gradual transition from the long, sunlit days of summer—where daylight peaked at 15 hours from June to August—towards the shorter, cozier days of autumn. With daylight beginning to dwindle, September still offers a vibrant atmosphere, inviting outdoor adventures before the chill of winter fully sets in. As we look forward, October's 10 hours of daylight heralds the impending colder months, showcasing the beautiful rhythm of nature's changing seasons.
As September rolls into Flims, Switzerland, the air begins to shift, bringing a subtle yet noticeable change in the landscape. The average wind speed settles at a gentle 1.1 m/s (2 mph), matching the soft breezes of August. This slight dip reflects a trend of calmness as summer fades, with winds throughout the year remaining consistently light, rarely rising above 1.5 m/s (3 mph). Notably, September marks one of the season's quieter moments, providing a tranquil backdrop, perfect for enjoying the stunning alpine views and the early hints of autumn’s vibrant hues. With the wind whispering softly through the valleys, it’s a serene time to experience the charm of Flims before winter’s chill sets in.
Weather in Flims varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Flims, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures range from a chilly -10°C (15°F) at night to a pleasant 21°C (70°F) during the day, with an average of 9°C (48°F). The month is marked by relatively high humidity at 83% and rainfall of 152 mm (6.0 in) over about 15 days. In stark contrast, January experiences even cooler temperatures, with a minimum of -26°C (-15°F) and a maximum of just 6°C (44°F), averaging -8°C (19°F). Despite slightly lower precipitation at 107 mm (4.2 in) over 11 days, January's humidity reaches 92%, making the air feel even colder. For more details on the weather during this wintry month, check out Flims weather in January.
September and February present contrasting weather patterns, reflecting the transition from summer to winter. In September, temperatures range significantly from a minimum of -10°C (15°F) to a comfortable maximum of 21°C (70°F), with an average of 9°C (48°F). The month is also characterized by high humidity at 83% and a total precipitation of 152 mm (6.0 in) over 15 days, indicating frequent rain.
In contrast, February experiences colder temperatures, with a minimum of -24°C (-11°F) and a maximum of only 9°C (48°F), averaging -4°C (25°F). The humidity remains high at 89%, but precipitation is lower at 73 mm (2.9 in) over 12 days. For a more detailed look at what to expect during this chilly month, you can check out Flims weather in February.
September and March exhibit notable differences in weather patterns. In September, temperatures range from a chilly -10°C (15°F) to a pleasant max of 21°C (70°F), with an average of 9°C (48°F), fostering a mild atmosphere. However, precipitation is substantial at 152 mm (6.0 in) over 15 days, and humidity hovers around 83%. In contrast, March is much colder, with temperatures dropping to a minimum of -24°C (-11°F) and only reaching a maximum of 13°C (56°F), averaging -2°C (29°F). Although it is slightly drier with 109 mm (4.3 in) of precipitation over 16 days, the humidity remains high at 87%. For a deeper dive into March weather specifics, see Flims weather in March.
In comparing the weather between September and April, we find notable contrasts in temperature and precipitation. September typically enjoys milder conditions, with average temperatures ranging from a minimum of -10°C (15°F) to a maximum of 21°C (70°F), while April experiences colder temperatures, with averages ranging from -21°C (-6°F) to a maximum of 15°C (60°F). Furthermore, September sees higher precipitation levels at 152 mm (6.0 in) across 15 days compared to April's 95 mm (3.7 in) over 13 days. Both months share similar humidity levels, with September at 83% and April slightly higher at 84%. For more detailed information on April weather, you can visit Flims weather in April.
When comparing the weather in September and May, both months exhibit similar temperature ranges and levels of precipitation. September generally sees slightly higher average temperatures, with a minimum of -10°C (15°F) and a maximum of 21°C (70°F), while May features a minimum of -10°C (14°F) with a maximum of 22°C (72°F). Notably, September has an average temperature of 9°C (48°F), compared to May’s average of 6°C (43°F). In terms of precipitation, both months experience comparable amounts, with September receiving 152 mm (6.0 in) over 15 days and May accumulating 150 mm (5.9 in) over 21 days. Humidity levels are also close, with September at 83% and May at 80%. For a more detailed look at the weather conditions in May, you can check Flims weather in May.
September and June both exhibit moderate temperatures, but September tends to be cooler overall. While September experiences a minimum temperature of -10°C (15°F) and an average of 9°C (48°F), June starts off with a milder minimum of -2°C (29°F) and an average temperature of 11°C (53°F). June also reaches higher maximum temperatures, peaking at around 27°C (82°F) compared to September's maximum of 21°C (70°F). In terms of precipitation, both months are relatively similar, with September recording 152 mm (6.0 in) over 15 days and June slightly wetter at 158 mm (6.2 in) over 19 days. Humidity levels are also comparable, with September at 83% and June slightly lower at 82%. For more details on June weather in Flims, you can check out Flims weather in June.
When comparing the weather in September to that of July, we see distinct differences in temperature and precipitation patterns. September experiences cooler temperatures, with a minimum of -10°C (15°F) and an average of 9°C (48°F), while July boasts a milder climate, ranging from a minimum of 3°C (38°F) to an average of 12°C (55°F), peaking at a maximum of 27°C (80°F). Additionally, July tends to be wetter, receiving 180 mm (7.1 in) of precipitation over 20 days, compared to September's 152 mm (6.0 in) over 15 days. Despite both months having a humidity level of 83%, the overall feel of July is much warmer and more humid than that of the cooler September. For more details on conditions during July, visit Flims weather in July.
Comparing the weather between August and September reveals notable differences in temperature and precipitation. In September, temperatures dip slightly, with a minimum of -10°C (15°F) and an average of 9°C (48°F), peaking at 21°C (70°F). This is in contrast to August, where temperatures range from a minimum of 1°C (35°F) to a maximum of 24°C (76°F), with an average of 12°C (54°F). Additionally, September experiences more rainfall, with 152 mm (6.0 in) over 15 days, compared to August's 234 mm (9.2 in) spread across 20 days. Humidity remains fairly high in both months, with September at 83% and August at 80%. For a detailed look at August weather, you can visit Flims weather in August.
September and October exhibit notable shifts in weather patterns, reflecting the transition from summer to autumn. In September, temperatures range from a chilly minimum of -10°C (15°F) to a pleasant maximum of 21°C (70°F), with an average temperature of 9°C (48°F). The month experiences significant precipitation, totaling 152 mm (6.0 in) over 15 days, accompanied by a humidity level of 83%.
In contrast, October features slightly milder temperatures, with a minimum of -8°C (18°F), an average of 5°C (40°F), and a maximum of 17°C (62°F). Precipitation levels remain comparable at 153 mm (6.0 in), but occur over fewer days—just 12. This month sees an increase in humidity at 90%, contributing to a more damp and chilly atmosphere. For more specific details on the October weather in Flims, you can visit Flims weather in October.
September typically features milder temperatures, with a minimum of -10°C (15°F) and an average of 9°C (48°F), reaching a maximum of 21°C (70°F). It also experiences notable precipitation, averaging 152 mm (6.0 in) over about 15 days, along with high humidity at 83%. In contrast, November brings chillier conditions, with temperatures dipping to a minimum of -20°C (-4°F), an average of -1°C (30°F), and a maximum of only 13°C (56°F). Though total precipitation decreases slightly to 108 mm (4.3 in) across 13 days, humidity rises to 88%. For further details on the weather in November, you can refer to Flims weather in November.
September and December present contrasting weather conditions. In September, temperatures range from a chilly -10°C (15°F) at their lowest to a mild 21°C (70°F) at their peak, with an average of 9°C (48°F). The month experiences a fair amount of rain, totaling 152 mm (6.0 in) over 15 days, accompanied by relatively high humidity at 83%. In stark contrast, December's temperatures drop significantly, with lows of -25°C (-13°F) and a much colder average of -6°C (22°F), peaking at only 6°C (43°F). Although precipitation decreases slightly to 145 mm (5.7 in) over 18 days, humidity rises to 90%, creating a much more chilling atmosphere. For further details about December weather, you can visit Flims weather in December.
As September descends upon Flims, the weather presents a unique blend of warmth and crispness that sets it apart from the summer months. While the maximum temperatures start to drop significantly, the lingering warmth still invites outdoor adventures, juxtaposed with cool evenings that hint at the impending autumn. With an average humidity of 83%, the air feels refreshing, although rain becomes more frequent, contributing to an overall precipitation total of 152 mm over about half the month. This transition period marks a beautiful shift in the landscape, where vibrant foliage begins to emerge, distinguishing September as a time of change and natural beauty in Flims. For a deeper dive into the climate details of this picturesque destination, explore Flims Climate.