ローザンヌ 8月の天気

Regulars put an August day here around 23C with sun and thunderstorms mixed, and call the month genuinely unpredictable - some sweltering, others chilly enough to remember years later. Our row's 24.8C sits over 137.3mm across 13.7 precipitation days, about ten millimetres a wet day, and their gloss matters twice over: the storms come in the afternoon, and they are usually very local, so a black sky over one shore says little about the other. The lake is swimmable from about mid-June to early September but never warm, being Alpine meltwater. Montreux itself has rocks rather than sand; the small beach is down at Chillon in the castle's shadow. The record: 17.2C nights, humidity 77 percent, 11.1 hours of sun, a 7.9 kph wind and AQI 41.

Forum posters describe Lausanne as sharing Geneva's general winter pattern but with noticeably less fog, since the wider Swiss plateau and Geneva itself can sit under low cloud for days at a time in December. Posters note it seldom drops below freezing in low-lying lakeside spots like Lausanne, and some winters bring little or no snow at all right in the city center, even though the region's full climate record shows meaningful average December snowfall and a fairly high number of rainy days overall - Lausanne's lakeside elevation runs milder and snow-uncertain compared to nearby higher ground. Posters are enthusiastic about December as Christmas market season, with especially large ones in Basel, Bern, Zurich and nearby Montreux worth combining with a Lausanne base. Posters generally rate December as cold, often grey and snow-uncertain for Lausanne itself, workable and increasingly festive as the Christmas market season gets underway.

Forum posters put early June around 15-25C and call it beautiful without being too hot, though they're quick to flag that Swiss weather is genuinely unpredictable and varies a lot by altitude - expect a real mix of warm sun, rain, and the occasional thunderstorm within the same trip. Layered clothing plus sturdy waterproof shoes are the standard packing call. June draws noticeably fewer crowds than peak summer, though the city's jazz festival dates are worth checking in advance if avoiding a busier stretch matters to the itinerary.