Lakes Route, stage 2: Spiez → Luzern
On stage 2 (Spiez → Luzern, 115 km) the best month is September: 55% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.0 km/h on average; ERA5 2006–2025, 9:00–18:00).
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 1% | 29% | 125 | 0 °C | 0% | 99% | 8.9 † |
| February | 5% | 29% | 95 | 2 °C | 0% | 94% | 10.2 † |
| March | 17% | 34% | 121 | 5 °C | 0% | 81% | 11.8 |
| April | 36% | 36% | 125 | 9 °C | 0% | 54% | 13.5 |
| May | 38% | 54% | 193 | 13 °C | 0% | 30% | 15.0 |
| June | 42% | 57% | 211 | 18 °C | 0% | 6% | 15.8 |
| July | 44% | 55% | 233 | 19 °C | 1% | 2% | 15.5 |
| August | 49% | 50% | 228 | 19 °C | 0% | 3% | 14.2 |
| September | 55% | 41% | 161 | 15 °C | 0% | 13% | 12.5 |
| October | 50% | 28% | 127 | 11 °C | 0% | 38% | 10.8 † |
| November | 13% | 30% | 128 | 5 °C | 0% | 85% | 9.3 † |
| December | 1% | 32% | 139 | 1 °C | 0% | 99% | 8.6 † |
Best months are all months within 3 percentage points of the best one. † less than 11 hours of daylight — long stages get tight.
Wind by month
| Month | Wind Spiez → Luzern, km/h | Headwind > 15 km/h, Spiez → Luzern | Headwind > 15 km/h, Luzern → Spiez | Better way |
|---|---|---|---|---|
| January | +0.9 | 0% | 0% | either |
| February | +0.4 | 0% | 0% | either |
| March | −0.1 | 0% | 0% | either |
| April | −0.8 | 0% | 0% | either |
| May | −0.8 | 0% | 0% | either |
| June | −1.1 | 0% | 0% | either |
| July | −0.6 | 0% | 0% | either |
| August | −0.6 | 0% | 0% | either |
| September | −1.0 | 0% | 0% | either |
| October | −0.2 | 0% | 0% | either |
| November | +0.6 | 0% | 0% | either |
| December | +1.1 | 0% | 0% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 136–161 | E | +1.2 |
| 161–187 | E | +0.3 |
| 187–212 | N | −2.1 |
| 212–237 | NE | −2.2 |
| 237–251 | N | −2.9 |
Other stages
- Montreux → Spiez 136 km
- Spiez → Luzern 115 km
- Luzern → Niederurnen 124 km
- Niederurnen → Rorschach 127 km
How to read the numbers
Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.