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📊 Monthly Climate Overview
| Month | Max °C | Min °C | Rain mm | Rain Days | Sun h | Wind km/h | Sea °C |
|---|---|---|---|---|---|---|---|
| Jan | 5.4°C | -0.1°C | 123.5 mm | 14 | 5.4 h | 12.2 km/h | 7°C |
| Feb | 7.7°C | 0.4°C | 90.4 mm | 11 | 6.9 h | 12.6 km/h | 6°C |
| Mar | 11.2°C | 2.6°C | 96.2 mm | 11 | 8.7 h | 13 km/h | 7°C |
| Apr | 15.2°C | 5.8°C | 79.7 mm | 11 | 10.3 h | 13.1 km/h | 9°C |
| May | 18.3°C | 9.6°C | 133.9 mm | 14 | 10.9 h | 13.8 km/h | 13°C |
| Jun | 23.8°C | 14.7°C | 89.5 mm | 13 | 12.5 h | 12 km/h | 17°C |
| Jul | 26.4°C | 16.8°C | 101.4 mm | 12 | 12.6 h | 12.2 km/h | 20°C |
| Aug | 25.8°C | 16.4°C | 84 mm | 10 | 11.5 h | 11.7 km/h | 20°C |
| Sep | 21.5°C | 13°C | 79.6 mm | 10 | 10.2 h | 11.3 km/h | 18°C |
| Oct | 16.5°C | 8.7°C | 100.1 mm | 11 | 8.0 h | 10.9 km/h | 14°C |
| Nov | 10.1°C | 3.8°C | 119.8 mm | 14 | 5.9 h | 11 km/h | 10°C |
| Dec | 7°C | 1.1°C | 127.8 mm | 14 | 5.2 h | 10.7 km/h | 8°C |
🌊 Water temperatures are based on multi-year averages from public tourism and weather sources. Actual values can vary by ±2 °C depending on conditions.
📖Climate & Best Time to Visit Lake Geneva
Lake Geneva (Switzerland) has a Mediterranean / mild temperate climate with an annual average of around 12 °C. Daytime highs average 16 °C, while nights cool to about 8 °C. The destination sees roughly 1226 mm of rainfall per year and 9 hours of sunshine per day on average.
Western Europe's largest freshwater lake between France and Switzerland — Geneva's historic harbour with the Jet d'Eau, the Château de Chillon and the Lavaux wine terraces.
Best swimming season runs from early summer into September: in July water reaches its warmest point around 20 °C, while air temperatures climb up to 26.4 °C in July.
Note: with roughly 27 °C between the hottest and coldest month, picking the right time of year matters a lot here.
🎟️ Top activities in Lake Geneva
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Frequently asked questions about Lake Geneva
When is the best time to visit Lake Geneva?
The best time to visit Lake Geneva: August (avg. 21.1 °C, 10 rainy days). Based on the monthly values for 2014 to 2023.
What are the temperatures in Lake Geneva?
The warmest month is July with an average of 21.6 °C and daytime highs around 26.4 °C. The coldest month is January with an average of 2.7 °C and night-time lows around -0.1 °C.
How many rainy days does Lake Geneva have?
January has the most rainy days with 14 rainy days. The driest month is August with 10 rainy days.