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Best Time for The French Alps: Annecy to Chamonix
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Sweet spot: April, September, October. Computed from NASA POWER climate normals across the route's overnight towns, balancing temperature, rainfall and daylight.
💡 Good to know
- This reviewed summer journey pairs Annecy’s public lakefront with Chamonix mountain excursions. Every lift, train and high-altitude visit still depends on its dated operating calendar, reservation and weather.
- This baseline is withheld outside June–September because the mountain components have separate seasonal closures and operating calendars. Annecy and Chamonix can still be visited independently.
| Month | Low | High | Rain | Daylight | |
|---|---|---|---|---|---|
| January | −7.5°C | 0.0°C | 102 mm | 8.8 h | ❄ |
| February | −7.4°C | 0.8°C | 74 mm | 10.1 h | ❄ |
| March | −3.5°C | 4.6°C | 92 mm | 11.6 h | ❄ |
| April | 0.9°C | 10.1°C | 74 mm | 13.3 h | ❄ |
| May | 4.8°C | 14.3°C | 114 mm | 14.7 h | |
| June | 9.3°C | 18.7°C | 102 mm | 15.5 h | |
| July | 11.1°C | 20.9°C | 98 mm | 15.2 h | |
| August | 10.6°C | 20.6°C | 102 mm | 14.0 h | |
| September | 6.7°C | 16.7°C | 76 mm | 12.3 h | |
| October | 2.9°C | 12.4°C | 88 mm | 10.7 h | ❄ |
| November | −2.0°C | 5.7°C | 95 mm | 9.2 h | ❄ |
| December | −6.0°C | 1.2°C | 108 mm | 8.5 h | ❄ |