Last updated: August 27, 2025
In September, the charming town of Saint-Prex, Switzerland, experiences a delightful mix of warmth and refreshing breezes. With a maximum temperature reaching 27°C (80°F) and an average of 16°C (61°F), this month showcases the tail end of summer. However, nature also expresses itself through 85 mm (3.3 in) of precipitation over 11 days, contributing to the lush greenery that characterizes the area. The humidity level sits at a comfortable 81%, making early autumn a perfect time for leisurely strolls by the lakeside or exploring the picturesque surroundings. Whether you're savoring the moderate temperatures or enjoying the gentle rain, September in Saint-Prex is a seasonal highlight not to be missed.
In September, Saint-Prex, Switzerland transitions gracefully from the warm embrace of summer to the cool hints of autumn. The temperatures start to moderate, with minimums averaging around 6°C (43°F), while the average temperature hovers at a comfortable 16°C (61°F), and daytime highs can reach a pleasant 27°C (80°F). This month showcases a delightful balance, where warm days allow for outdoor adventures, and cooler evenings invite cozy gatherings. The change in season is palpable, as the lush landscapes of summer begin to take on the golden hues of fall, making September a truly picturesque time to experience this charming Swiss town.
In September, Saint-Prex, Switzerland, experiences a notable shift in precipitation patterns as summer transitions to autumn. With 85 mm (3.3 in) of rainfall spread across 11 days, September presents a more moderate climate compared to the preceding months. This decrease in precipitation follows the peak of the summer rainfall, evidenced by May's high of 147 mm (5.8 in) and is aligned with a general downward trend as the year progresses towards the drier months. However, the rainfall remains consistent with the average autumn conditions in the region, making it an ideal time for both local nature to thrive and visitors to enjoy the changing landscapes without the summer deluge.
As summer fades in Saint-Prex, Switzerland, September brings a slight uptick in humidity, settling at an average of 81%. This marks a gentle transition from the drier conditions experienced in August, where humidity dipped to 77%. Overall, September's humidity is part of a seasonal trend where the levels remain relatively high, particularly in the cooler months, such as January and February, when they peak at 91% and 89%, respectively. This gradual increase towards the fall suggests a return to the more humid climate typical of the region, setting the stage for the dampness that often characterizes the autumn months ahead.
As summer gives way to autumn in Saint-Prex, Switzerland, September marks a transition with a UV Index of 7, categorizing exposure as high. This indicates a slight decline from the peak summer months, where the UV Index reached a high of 10 in June. Despite the decreasing trend, sun protection remains crucial, as the burn time is still only 25 minutes. This pattern reflects a gradual easing of intensity, but it's essential for residents and visitors alike to remain mindful of the sun's rays during this month. For those planning outdoor activities, staying informed is key—check the daily forecast for the latest updates at Saint-Prex UV Index.
UV Risk Categories
September in Saint-Prex, Switzerland, boasts a delightful blend of warmth and vibrant sunshine, amassing 327 hours of golden rays. As summer transitions to autumn, this month reflects a slight decline from the sun-drenched days of July and August, when the hours peaked at 414 and 384 respectively. However, September’s sunshine still shines brightly compared to the earlier months of the year, marking it as one of the sunnier times before the gentle coolness of October arrives, bringing its own charm with 281 hours. This gradual ebbing of sunlight fosters a picturesque backdrop of fall foliage, making September a perfect time to bask in nature’s beauty before the winter chills set in.
As summer transitions into autumn, the likelihood of sunny weather in September in Saint-Prex, Switzerland, stands at a moderate 36%. Although this percentage indicates a slight dip from the sunniest months of April (51%) and March (47%), it still offers a healthy chance for enjoyable, bright days. September experiences a gradual decrease in sunshine compared to the peak summer months of July and August, where sun chances hovered around 38% and 41% respectively, suggesting that while the sunny days become less frequent, there's still plenty of opportunity to soak up the lingering warmth of summer before autumn fully takes over.
As summer gives way to autumn, September in Saint-Prex, Switzerland, offers a noticeable transition in daylight duration. With 12 hours of daylight, the month marks a gentle decline from the peak of 15 hours experienced in the summer months of June through August. This gradual shift mirrors the overall pattern throughout the year, where daylight extends to a maximum in late spring and summer before tapering off in the fall and winter. As the days grow shorter, the enchanting colors of autumn foliage in Saint-Prex become increasingly captivating, inviting both residents and visitors to savor the beauty of this picturesque lakeside town as it prepares for the changing seasons.
As September arrives in Saint-Prex, Switzerland, the gentle embrace of the wind shifts noticeably, with average speeds dropping to 1.4 m/s (3 mph), marking the year's calmest month. This decline in wind speed is part of a gradual downward trend observed through the summer, where July and August recorded a steady 1.7 m/s (4 mph). Following this serene September, the winds pick up again in October, hinting at the crisp, revitalizing breezes that signal autumn's approach. In contrast to the more vigorous movements of spring, the early fall in Saint-Prex invites a tranquil atmosphere, perfect for enjoying the picturesque lakeside views as the landscape prepares for its seasonal transformation.
Weather in Saint-Prex varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Prex, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, temperatures are generally milder, ranging from a minimum of 6°C (43°F) to a maximum of 27°C (80°F), with an average of 16°C (61°F). The month sees about 85 mm (3.3 in) of precipitation over 11 days and has a humidity level of 81%. In contrast, January is much colder, with temperatures dipping as low as -5°C (22°F) and averaging only 3°C (37°F), peaking at 13°C (56°F). January also experiences more precipitation, totaling 111 mm (4.4 in) over the same 11 days, but with slightly higher humidity at 91%. For more details on January weather, check Saint-Prex weather in January.
September and February in Saint-Prex showcase strikingly different weather patterns. In September, temperatures range from a mild 6°C (43°F) to a warm 27°C (80°F), creating a comfortable atmosphere with an average of 16°C (61°F). However, this month also brings about 85 mm (3.3 in) of precipitation over 11 days, coupled with relatively high humidity at 81%. Conversely, February presents a much colder landscape, with temperatures dropping to a minimum of -10°C (14°F) and averaging around 4°C (40°F). The maximum temperature in February reaches 17°C (62°F). Interestingly, precipitation remains comparable at 89 mm (3.5 in) over the same number of days, but the humidity climbs slightly higher to 89%. For more detailed information, check out Saint-Prex weather in February.
When comparing the weather in September and March, significant differences are evident. September boasts a mild average temperature of 16°C (61°F), with daytime highs reaching up to 27°C (80°F), making it generally more comfortable than March, which has a much cooler average of 6°C (43°F) and nighttime lows that can plunge to -8°C (18°F). Additionally, September receives about 85 mm (3.3 in) of precipitation over 11 days, while March is wetter, with 118 mm (4.6 in) falling over 15 days. Furthermore, humidity levels are slightly higher in March at 87%, compared to September's 81%. For more detailed insights into March weather, you can refer to Saint-Prex weather in March.
Comparing the weather in September and April reveals distinct seasonal characteristics. In September, temperatures range from a minimum of 6°C (43°F) to a pleasant maximum of 27°C (80°F), with an average of 16°C (61°F). The month experiences about 85 mm (3.3 in) of precipitation over 11 days and maintains a humidity level of 81%. In contrast, April presents cooler weather, with temperatures dropping to a minimum of -2°C (29°F) and reaching a maximum of 24°C (76°F), averaging around 9°C (49°F). It records less precipitation at 57 mm (2.2 in) over 8 days, while humidity is slightly higher at 84%. For more detailed insights into April's conditions, you can visit Saint-Prex weather in April.
September and May present contrasting weather patterns that reflect the transition between seasons. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 27°C (80°F), with an average of 16°C (61°F) and relatively lower precipitation of 85 mm (3.3 in) over 11 rainy days. The humidity level is slightly higher at 81%. In contrast, May experiences cooler temperatures, with a minimum of 1°C (34°F) and a maximum of 25°C (78°F), averaging at 13°C (55°F). However, it has a significantly higher rainfall amount of 147 mm (5.8 in) spread over 16 days, maintaining a similar humidity level of 80%. For a detailed look at May weather, check out Saint-Prex weather in May.
When comparing the weather in September and June, there are some notable differences. In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 27°C (80°F), with an average temperature of 16°C (61°F). This month sees approximately 85 mm (3.3 in) of precipitation over about 11 days, accompanied by a humidity level of 81%.
In contrast, June enjoys milder temperatures, with a minimum of 9°C (48°F), an average of 18°C (64°F), and a maximum reaching 33°C (91°F). Precipitation in June is slightly higher at 104 mm (4.1 in) over about 15 days, with humidity remaining similar at 82%.
For more detailed weather information, you can check Saint-Prex weather in June.
When comparing the weather of September and July, notable differences emerge in temperature and precipitation. July generally boasts warmer temperatures, with minimums around 11°C (52°F) and maximums reaching up to 33°C (91°F), leading to an average of 20°C (68°F). In contrast, September sees cooler temperatures, with a minimum of 6°C (43°F) and a maximum of 27°C (80°F), resulting in a more moderate average of 16°C (61°F).
Additionally, July tends to be wetter, recording 121 mm (4.8 in) of precipitation over 14 days, whereas September has less rainfall at 85 mm (3.3 in) across 11 days. Humidity levels remain relatively similar, with July at 82% and September at 81%. For a detailed view of July weather patterns, you can check the following link: Saint-Prex weather in July.
In September, the weather in Saint-Prex experiences a noticeable shift compared to August. The average temperature drops from 19°C (67°F) in August to 16°C (61°F) in September, with maximum temperatures peaking at 27°C (80°F) versus August's warmer highs of 31°C (88°F). Additionally, September sees a decrease in average daily maximum temperatures and overall warmth. Humidity remains slightly higher in September at 81%, compared to 77% in August. Precipitation also declines slightly, with September receiving 85 mm (3.3 in) over 11 days, compared to August's 110 mm (4.3 in) over 12 days. For more detailed insights into August's weather, you can check this link: Saint-Prex weather in August.
In September, the weather is generally warmer, with temperatures ranging from a minimum of 6°C (43°F) to a maximum of 27°C (80°F) and an average of 16°C (61°F). This month typically experiences around 85 mm (3.3 in) of precipitation over 11 days, along with a humidity level of 81%. In contrast, October brings a noticeable chill, featuring lower temperatures with a minimum of 2°C (36°F), an average of 12°C (53°F), and a maximum of 21°C (71°F). The precipitation also increases, totaling 110 mm (4.3 in) across 13 days, accompanied by higher humidity at 89%. For more detailed information, you can check Saint-Prex weather in October.
In September, temperatures range from a minimum of 6°C (43°F) to a maximum of 27°C (80°F), creating a pleasant average of 16°C (61°F). The month experiences moderate rainfall, accumulating about 85 mm (3.3 in) over 11 days, with humidity levels relatively high at 81%. In contrast, November sees a significant drop in temperatures, where the minimum dips to 0°C (32°F) and the average settles at 7°C (45°F), with a maximum of 17°C (63°F). Precipitation increases to 103 mm (4.1 in) over 13 days, coupled with even higher humidity at 89%. For more detailed information, you can check Saint-Prex weather in November.
September and December showcase notably different weather characteristics. In September, temperatures range from a minimum of 6°C (43°F) to a pleasant average of 16°C (61°F), peaking at 27°C (80°F). This month sees moderate rainfall of 85 mm (3.3 in) spread over 11 days, contributing to a relative humidity of 81%. In contrast, December presents a chillier scenario, with temperatures dropping to a minimum of -4°C (26°F) and averaging only 4°C (39°F), reaching a maximum of 13°C (55°F). Rainfall increases significantly to 186 mm (7.3 in) across 19 days, coupled with higher humidity at 91%. For more detailed information, you can check Saint-Prex weather in December.
As September ushers in the transition from summer to autumn in Saint-Prex, the weather becomes a delightful blend of warmth and refreshing coolness. With temperatures averaging a comfortable 16°C, it's an ideal time for outdoor activities, yet the days can swing from pleasantly warm afternoons to cooler evenings, reminding us of the upcoming fall. Unlike the drier summer months, September witnesses a modest increase in precipitation, with rain gracing the area on about 11 days, contributing to a lush landscape. The air retains a notable humidity level of 81%, offering a crisp, invigorating atmosphere. For those keen on understanding the local weather patterns, be sure to explore more at Saint-Prex Climate.