Lucerne
Switzerland · Europe
Year-round range: 31°F to 74°F
September
Good time to visit
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
September has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = SepPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
September is one of the wetter months — pack rain gear.
Sunshine
Average hours of bright sun per day.
September has decent sunshine — a mix of sun and cloud.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
September is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for September.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In September, afternoons reach about 68° and nights settle near 57°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 41°F | 31°F | 14 | 3.9in | 2.6h | 82.28571428571428% |
| Feb | 44°F | 31°F | 12 | 3.0in | 3.5h | 77.14285714285714% |
| Mar | 50°F | 35°F | 14 | 3.7in | 4.6h | 72.71428571428571% |
| Apr | 57°F | 39°F | 14 | 4.0in | 5.4h | 71% |
| May | 64°F | 47°F | 19 | 6.1in | 5.2h | 73.14285714285714% |
| Jun | 72°F | 55°F | 18 | 6.0in | 6.5h | 72.85714285714286% |
| Jul | 74°F | 59°F | 18 | 6.5in | 6.7h | 73.28571428571428% |
| Aug | 74°F | 60°F | 17 | 6.3in | 6.1h | 74.99999999999999% |
| Sep | 67°F | 54°F | 15 | 4.6in | 4.8h | 79.28571428571428% |
| Oct | 60°F | 47°F | 13 | 3.9in | 3.6h | 81.28571428571429% |
| Nov | 48°F | 38°F | 14 | 3.9in | 2.5h | 84.28571428571428% |
| Dec | 42°F | 33°F | 15 | 4.2in | 2.4h | 84.57142857142857% |
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Planning notes
Expect some rain.