Lucerne weather in September
September in Lucerne: nice, soaked, with clean air — fine if you can take 16 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#2 of 12 months in Lucerne · #616 of 1413 destinations to visit in September · comfort 82/100 (tier A)
- Days
- 21°C
- Nights
- 12°C
- Wet days
- 16
- Sun
- 9.1 h
- Humidity
- 79%
- Daylight
- 13 h
Traveller notes on Lucerne in September
September is the forum's pick for Lucerne — the August crowds gone, a first crispness in the mountains, and weather at least as good as August as often as not. Days run about 20°C, evenings cooler, with one caveat the record supplies: rain falls on nearly fifteen days. Regulars call September "not especially rainy as a rule" while also warning it can go from fully sunny to fully wet inside a day, which is the more useful half of that. Pack layers, waterproof shoes and a rain jacket for the mountains, plus high-factor sun cream. Snow in Lucerne itself would be very unusual; Titlis has it year-round, being a glacier.
Other months in Lucerne
Forum posters describe March in Lucerne as genuinely unpredictable - sometimes cold and wet, sometimes dry and sunny - with fog no more common here than in Zurich or elsewhere in Switzerland, and no reliable way to predict conditions more than a day or two ahead. Posters cite typical lower-elevation temperatures ranging from 0 to 20C, with sun, fog, rain and even snow all realistic possibilities within the same week. Posters are consistent that by late March, snow is gone from the lake plain but still very present in the mountains, giving visitors a genuine choice: stay around Lucerne and the lake for a springlike feel, or head up to Titlis above Engelberg or Rigi for a proper winter scene. Posters generally recommend checking forecasts close to travel dates rather than planning weather-dependent activities too far in advance.
Add your own note from Lucerne's card on the map.
Lucerne climate normals — September
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Lucerne in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyCoach and day-trip hours, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Lucerne's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherLucerne's best weather comes in June, August and September — separate windows, not one continuous season.
September includes Lucerne Festival.
Best weatherFair weatherToughest weather
What's on in Lucerne in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Coach and day-trip hours
1 Apr – 31 Oct · usuallyDay-tripper crushCrowdedLucerne is the standard one-day stop on every Swiss coach tour, so the Chapel Bridge and the Lion Monument are a scrum from mid-morning to late afternoon. Before nine and after six it is a quiet lakeside town.
- Season
Paddle steamer season
1 Apr – 25 Oct · usuallySummer season opensFive Belle Époque paddle steamers work the lake in season and drop to a token winter service after. The boat to Alpnachstad or Vitznau is how you reach the mountain railways without a car. Source ↗
- Opening
Pilatus cogwheel railway season
10 May – 15 Nov · usuallyTrail seasonClosuresThe steepest cogwheel railway in the world only runs when the track is clear of snow, roughly May to November; in winter the mountain is cable car only from the other side. Snow at the top can delay the opening by weeks. Source ↗
- Festival
Lucerne Festival
10 Aug – 15 Sep · usuallyMusic festivalBook earlyThe summer edition brings most of the world's touring orchestras through the KKL over five weeks, and the festival's own orchestra is assembled from principals who play nowhere else together. Tickets go on sale the previous spring. Source ↗
Nearby, and something's on
Within 300 km of Lucerne — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Lucerne?
Lucerne in September — FAQ
- Is September a good time to visit Lucerne?
- September in Lucerne: nice, soaked, with clean air — fine if you can take 16 rainy days. It ranks #2 of 12 months for Lucerne on SeasonMap's comfort score (82/100).
- What is the weather like in Lucerne in September?
- In September, Lucerne averages a daily high of 20.5°C and a low of 11.9°C, with about 157.3 mm of rain over roughly 15.5 rainy days.
- What is the air quality in Lucerne in September?
- Lucerne has a mean US Air Quality Index of about 50 in September.
Within 300 km: Interlaken's Lake steamers on summer timetable on 9 May – 11 Oct, and Gstaad's Walking season and alpine dairies around 15 Jun – 10 Oct.