September Weather in Laax, Switzerland

Last updated: August 27, 2025

In September, Laax, Switzerland experiences a delightful transition into autumn, with maximum temperatures reaching a pleasant 21°C (70°F) and dropping to a minimum of -10°C (15°F) at night. The average temperature settles around a crisp 9°C (48°F). Visitors can expect about 152 mm (6.0 in) of precipitation spread over 15 days, contributing to the lush landscapes. With humidity levels hovering around 83%, the air feels refreshingly brisk, making it an ideal time for outdoor adventures amidst stunning alpine scenery.

September Temperature in Laax

In September, Laax, Switzerland experiences a refreshing transition from the warmth of summer to the crispness of autumn. With temperatures swinging from a minimum of -10°C (15°F) to a pleasant maximum of 21°C (70°F), the month showcases an average of 9°C (48°F), indicative of the cooler days ahead. This notable drop from August’s mild climate reflects the onset of fall, as the region prepares for the approaching chill of winter. Nature's palette begins to shift, and visitors can enjoy the breathtaking scenery while still savoring the lingering warmth of early autumn.

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

The chart illustrates September temperature patterns in Laax, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Laax, September typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec182529354253545448402921
Data source: Temperature data for Laax generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Laax

In September, Laax experiences a significant amount of rainfall, with 152 mm (6.0 in) received over 15 days. This places it among the wetter months of the year, following the particularly rainy August, which recorded 234 mm (9.2 in). The precipitation pattern shows a gradual increase from the winter months, peaking in the summer and tapers slightly into autumn. This transition signals the end of the warm season and the onset of cooler, wetter conditions as the region prepares for the winter months ahead. The steady distribution of rain through September reinforces Laax's lush, green landscape, making it an enchanting location for visitors during this vibrant time of year.

September Precipitation Trends in Laax

The chart displays monthly precipitation patterns in Laax, 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. In Laax, September typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec1077310995150158180234152153108145
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Laax

As summer gives way to autumn in Laax, Switzerland, September's humidity levels reach a comfortable 83%, providing a pleasant balance after the warmer months. This slight uptick from August’s 80% marks a return to higher moisture levels, as the region begins transitioning into the wetter fall season. Notably, humidity remains relatively consistent throughout the year, peaking in the colder months with 92% in January and 90% in both October and December. The gradual shift in humidity indicates a shift in weather patterns, fostering a lush environment perfect for outdoor activities amid the stunning alpine landscapes.

September Average Humidity in Laax

This chart illustrates the average monthly humidity levels in Laax, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Laax is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Laax

As summer fades into autumn in Laax, Switzerland, the UV Index begins to decline, but caution is still warranted in September, with a UV Index of 7, categorized as high. This means that while the risk of harm from unprotected sun exposure is lower than in the peak summer months, one can still burn after just 25 minutes in the sun without proper protection. Compared to August's UV Index of 9, September offers a bit of relief, yet the need for vigilance remains crucial as we transition towards cooler months. Don't forget to check the detailed insights and stay informed about UV exposure levels at Laax UV Index!

Maximum UV Index Levels in Laax for September

The chart shows the monthly maximum UV Index (UVI) for Laax 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. In September, the maximum UV index in Laax typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24789101097532
Data source: Laax 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 Laax

As summer gently transitions into autumn, September in Laax, Switzerland, offers a spectacular blend of warmth and sunshine, boasting 302 hours of daylight. This lovely month follows the peak of summer in July, which recorded the highest sunshine hours at 404, before gradually tapering off into the cooler months. Interestingly, September's sunlight is reminiscent of April and March, marking a sustained brightness that enhances the majestic landscapes. With summer's vibrancy lingering, visitors can relish in the refreshing mountain air and the stunning fall foliage, making September an ideal time for outdoor activities and exploration. Whether you're hiking on scenic trails or enjoying the crisp scenery, Laax continues to shine brightly as autumn approaches.

Monthly Sunshine Duration in Laax: September Highlighted

The September sunshine duration represents the total number of hours Laax 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.
JanFebMarAprMayJunJulAugSepOctNovDec169h228h302h344h355h381h404h364h302h270h201h189h
Data source: Laax September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Laax During September

As autumn approaches, the likelihood of sunny weather in Laax, Switzerland during September stands at a moderate 33%. This marks a subtle rise compared to the preceding summer months, where July and August each had a chance of 27% sunshine. Interestingly, the trend shows that temperatures are gradually cooling, yet September retains a decent amount of sunny potential, making it an appealing time for outdoor activities. With the probability of sunshine slightly higher than in May and April, it’s a great opportunity to enjoy the stunning vistas of the Swiss Alps before the winter chill sets in.

Percentage of Sunny Days in September in Laax

The chart illustrates the percentage of sunny days in Laax 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 Laax experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec20%37%40%37%27%31%27%27%33%36%32%37%
Data source: Laax September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Laax in September

As summer gently fades into autumn in Laax, Switzerland, September offers a delightful balance of daylight with 12 hours of sunlit hours. Following the vibrant peak of 15 hours in the summer months of June through August, daylight starts to wane, but not drastically. This gradual reduction sets the stage for a transitional period, as nature prepares for the cooler months ahead. In October, daylight decreases further to 10 hours, echoing a familiar rhythm of the seasons as the days grow shorter and the crispness of fall begins to dominate the landscape.

Average Daylight Hours in Laax for September

The chart illustrates the variation in daylight duration in Laax throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h10h 18m11h 56m13h 36m15h 3m15h 47m15h 23m14h 7m12h 30m10h 50m9h 21m8h 35m
Data source: Laax daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Laax

As September arrives in Laax, Switzerland, the gentle whispers of the wind reflect the transition towards autumn. With an average wind speed of just 1.1 m/s (2 mph), this month ties with August for the calmest conditions of the year. Following a summer where winds barely stirred, September's stillness sets the stage for a serene landscape, allowing the splendor of the surrounding mountains to shine. However, as the season shifts, expect a slight uptick in wind speeds in October, hinting at the lively breezes that will soon accompany the vibrant autumn foliage. Embracing this tranquil moment, Laax invites visitors to experience the beauty of nature in a peaceful embrace before the winds of change blow in.

Average September Wind Speed in Laax

The chart displays monthly wind speed patterns in Laax, 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.
JanFebMarAprMayJunJulAugSepOctNovDec1.31.51.21.31.41.21.21.11.1 m/s1.41.31.3
Data source: Laax September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Laax Compares to Other Months

Weather in Laax varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Laax, focusing on differences in temperature, rainfall, humidity, and UV levels.

September and January present stark contrasts in weather conditions. In September, temperatures range from a chilly -10°C (15°F) at night to a pleasant 21°C (70°F) during the day, accompanied by an average temperature of 9°C (48°F). The month sees considerable precipitation of 152 mm (6.0 in) over 15 days, while humidity hovers at 83%. Conversely, January experiences much harsher conditions, with nighttime lows plummeting to -26°C (-15°F) and daytime highs reaching only up to 6°C (44°F), culminating in an average of -8°C (19°F). Although January has lower precipitation at 107 mm (4.2 in) over 11 days, it features a higher humidity level of 92%, creating a much colder and more biting atmosphere. For more detailed insights into the wintry weather conditions, check out Laax weather in January.

In September, the weather is relatively mild, with average temperatures ranging from a minimum of -10°C (15°F) to a maximum of 21°C (70°F). The month sees a significant amount of precipitation, totaling 152 mm (6.0 in) over 15 days, coupled with a humidity level of 83%. In contrast, February can be quite harsh, characterized by much colder temperatures, where the average ranges from a chilling -24°C (-11°F) to a maximum of just 9°C (48°F). February experiences less precipitation at 73 mm (2.9 in) across 12 days but has slightly higher humidity at 89%. For more detailed weather information, you can check Laax weather in February.

In comparing the weather conditions of September and March, we see notable differences in temperature and precipitation. September typically experiences milder temperatures, with minimums around -10°C (15°F) and maximums reaching 21°C (70°F), leading to an average of 9°C (48°F). In contrast, March is considerably colder, with minimum temperatures dropping to -24°C (-11°F) and average temperatures lingering at -2°C (29°F), peaking at just 13°C (56°F). Additionally, September witnesses higher precipitation levels, averaging 152 mm (6.0 in) over 15 days, while March has a lower total of 109 mm (4.3 in) over 16 days, reflecting a shift in weather patterns as the seasons transition. Humidity levels are slightly higher in March at 87% compared to 83% in September. For more detailed insights about the weather during March, you can check Laax weather in March.

In September, temperatures typically range from a chilly minimum of -10°C (15°F) to a pleasant maximum of 21°C (70°F), with an average of 9°C (48°F). The month is characterized by significant precipitation, totaling around 152 mm (6.0 in) over about 15 days, while humidity hovers at 83%. In contrast, April experiences even lower temperatures, with a minimum of -21°C (-6°F) and a maximum of 15°C (60°F), leading to an average of only 2°C (35°F). Precipitation in April is lighter, at 95 mm (3.7 in) across 13 days, and humidity levels are slightly higher at 84%. For more specific insights into April weather, you can refer to this link: Laax weather in April.

In comparing the weather patterns of September and May, both months exhibit relatively mild temperatures, but there are notable differences. September sees a wider temperature range with minimums around -10°C (15°F), averaging 9°C (48°F), and maximums reaching 21°C (70°F). In contrast, May has a slightly lower average temperature at 6°C (43°F), although it can still peak at 22°C (72°F). Both months are characterized by significant precipitation, with September recording 152 mm (6.0 in) over 15 days, while May has a similar total of 150 mm (5.9 in) but spans a greater number of rainy days at 21. The humidity is fairly high in both months, with September at 83% and May slightly lower at 80%. For a closer look at May weather in Laax, visit Laax weather in May.

September and June exhibit notable differences in weather patterns. In September, temperatures range from a chilly minimum of -10°C (15°F) to a comfortable average of 9°C (48°F), peaking at a max of 21°C (70°F). The month sees a significant amount of precipitation at 152 mm (6.0 in) over 15 days, accompanied by high humidity levels at 83%. In contrast, June experiences milder temperatures, with a minimum of -2°C (29°F), an average of 11°C (53°F), and a maximum that reaches up to 27°C (82°F). Although June sees slightly more precipitation at 158 mm (6.2 in) over 19 days, the humidity remains slightly lower at 82%. For more on Laax's weather during this month, you can explore Laax weather in June.

In comparing the weather of September and July, it's clear that July experiences milder temperatures, with an average of 12°C (55°F) compared to September's average of 9°C (48°F). July boasts higher maximum temperatures, reaching up to 27°C (80°F), while September's maximum peaks at 21°C (70°F). Interestingly, both months share the same humidity level of 83%, contributing to a similar feel in terms of moisture in the air. However, precipitation is slightly higher in July, with 180 mm (7.1 in) over 20 days, compared to September's 152 mm (6.0 in) over 15 days. For more details, you can check Laax weather in July.

In comparing the weather of September to August, we see notable differences in temperature and precipitation patterns. September experiences a wider temperature range, with minimums dropping to -10°C (15°F) and a cooler average of 9°C (48°F) compared to August's milder low of 1°C (35°F) and an average of 12°C (54°F). While both months are marked by rhythmic rainfall, September receives 152 mm (6.0 in) over 15 days, whereas August is significantly wetter with 234 mm (9.2 in) across 20 days. Humidity remains relatively high in both months, with September at 83% compared to August’s 80%. For more details on August weather, you can visit Laax weather in August.

In September, temperatures range from a minimum of -10°C (15°F) to a maximum of 21°C (70°F), with an average of 9°C (48°F). The month experiences considerable precipitation, totaling 152 mm (6.0 in) over 15 days, while humidity hovers around 83%. In contrast, October sees slightly milder temperatures, with minimums of -8°C (18°F) and maximums of 17°C (62°F), averaging 5°C (40°F). Although October has a similar precipitation total of 153 mm (6.0 in), it occurs over fewer days (12 days), and humidity increases to 90%. For a detailed look at how October weather unfolds, you can check out Laax weather in October.

September and November present distinct shifts in weather patterns. In September, temperatures range from a chilly -10°C (15°F) to a pleasant 21°C (70°F), with an average of 9°C (48°F). The month sees considerable rainfall, with 152 mm (6.0 in) over 15 days and a humidity level of 83%, creating a damp yet mild atmosphere. In contrast, November brings a noticeable drop in temperatures, featuring a minimum of -20°C (-4°F) and a maximum of 13°C (56°F), averaging around -1°C (30°F). Precipitation decreases slightly to 108 mm (4.3 in) over 13 days, though humidity rises to 88%, contributing to a much colder and potentially snowier environment. For more specific information on conditions, check out Laax weather in November.

In September, the weather is relatively mild with average temperatures reaching 9°C (48°F) and highs of 21°C (70°F). The month experiences considerable precipitation, totaling 152 mm (6.0 in) over about 15 days, contributing to a humidity level of 83%. In contrast, December brings much colder conditions, with average temperatures dropping to -6°C (22°F) and a maximum of only 6°C (43°F). Precipitation in December is slightly lower at 145 mm (5.7 in), but it occurs over more days, totaling 18, resulting in a higher humidity of 90%. For more details on the December climate, you can check Laax weather in December.

Compare Laax's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Laax

As September rolls into Laax, the weather undergoes a noticeable transformation compared to the peak summer months. With average temperatures dipping to a cool 9°C (48°F) alongside maximums around 21°C (70°F), it's clear that autumn is knocking on the door. The increased precipitation, tallying up to 152 mm (6.0 in) over approximately 15 days, adds a refreshing touch to the landscape, though it also means visitors should prepare for wet spells. The air's humidity level sits at a high 83%, creating a crisp and invigorating atmosphere that distinguishes September from the drier, warmer summer days. For a deeper look into weather patterns throughout the year, visit Laax Climate.