Lakes Route, stage 1: Montreux → Spiez
On stage 1 (Montreux → Spiez, 136 km) the best month is September: 65% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.1 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% | 128 | 2 °C | 0% | 99% | 8.9 † |
| February | 7% | 28% | 97 | 3 °C | 0% | 92% | 10.2 † |
| March | 25% | 32% | 119 | 7 °C | 0% | 72% | 11.8 |
| April | 46% | 38% | 115 | 11 °C | 0% | 39% | 13.5 |
| May | 45% | 53% | 186 | 15 °C | 0% | 18% | 15.0 |
| June | 51% | 48% | 162 | 19 °C | 1% | 2% | 15.8 |
| July | 55% | 44% | 184 | 21 °C | 1% | 0% | 15.5 |
| August | 59% | 40% | 171 | 21 °C | 1% | 1% | 14.2 |
| September | 65% | 34% | 128 | 17 °C | 0% | 5% | 12.5 |
| October | 60% | 27% | 111 | 13 °C | 0% | 24% | 10.8 † |
| November | 21% | 31% | 128 | 7 °C | 0% | 76% | 9.3 † |
| December | 1% | 33% | 150 | 2 °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 Montreux → Spiez, km/h | Headwind > 15 km/h, Montreux → Spiez | Headwind > 15 km/h, Spiez → Montreux | Better way |
|---|---|---|---|---|
| January | −0.3 | 0% | 0% | either |
| February | −0.1 | 0% | 0% | either |
| March | +0.2 | 0% | 0% | either |
| April | 0.0 | 0% | 0% | either |
| May | +0.3 | 0% | 0% | either |
| June | +0.4 | 0% | 0% | either |
| July | +0.9 | 0% | 0% | either |
| August | +0.7 | 0% | 0% | either |
| September | +0.1 | 0% | 0% | either |
| October | −0.2 | 0% | 0% | either |
| November | −0.1 | 0% | 0% | either |
| December | −0.3 | 0% | 0% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | N | −2.6 |
| 25–51 | E | +1.4 |
| 51–77 | SE | +3.0 |
| 77–102 | NE | −0.4 |
| 102–128 | NE | −0.7 |
| 128–136 | NE | −0.6 |
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.