Lake Champex
Lake Champex is a Swiss lake (Valais) at 1466 m, covering 0.1 km² with a maximum depth of 6 m. Typical winds: vents de montagne, abrité. Main shores and access points: Champex-Lac, Orsières, La Breya. The weather above is computed over the middle of the lake; the “Wind on the lake” section details hourly speed, gusts and direction — for sailing, windsurfing, paddling, fishing or swimming.
Climate of Lake Champex: 1991–2020 normals
In Lake Champex (1466 m), the mean annual temperature is 5.8 °C. The warmest month is July (14.2 °C on average) and the coldest February (−1.4 °C). About 1710 mm of precipitation falls per year, peaking in November (193 mm) with a minimum in September (99 mm). The mean monthly maximum reaches 24.1 °C and the absolute minimum −12.3 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) |
|---|---|---|---|---|
| Jan | −1.3 °C | 8.6 °C | −12.3 °C | 181 |
| Feb | −1.4 °C | 9.1 °C | −11.3 °C | 142 |
| Mar | 1.0 °C | 10.9 °C | −9.6 °C | 144 |
| Apr | 3.9 °C | 13.5 °C | −6.1 °C | 153 |
| May | 7.9 °C | 18.0 °C | −1.4 °C | 155 |
| Jun | 11.9 °C | 22.7 °C | 2.4 °C | 109 |
| Jul | 14.2 °C | 24.1 °C | 5.1 °C | 105 |
| Aug | 13.9 °C | 23.6 °C | 4.4 °C | 102 |
| Sep | 10.3 °C | 19.7 °C | 1.2 °C | 99 |
| Oct | 7.2 °C | 16.6 °C | −2.7 °C | 146 |
| Nov | 2.3 °C | 13.2 °C | −7.7 °C | 193 |
| Dec | −0.4 °C | 9.3 °C | −10.5 °C | 182 |
| Year | 5.8 °C | 24.1 °C | −12.3 °C | 1710 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Les Attelas (14 km, 2734 m), Evionnaz (18 km, 482 m), Col du Grand St-Bernard (18 km, 2472 m), adjusted to the elevation of Lake Champex (1466 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Swiss lakes
- Weather Lake Tanay (41 km · 1408 m)
- Weather Lake Geneva (64 km · 372 m)
- Weather Blausee (70 km · 887 m)
- Weather Lake Oeschinen (70 km · 1578 m)
- Weather Schwarzsee (Lac Noir) (72 km · 1046 m)
- Weather Lake Gruyère (75 km · 677 m)
Nearby municipalities
- Weather Orsières (4 km)
- Weather Sembrancher (6 km)
- Weather Bovernier (7 km)
- Weather Val de Bagnes (7 km)
- Weather Trient (9 km)
- Weather Liddes (9 km)
- Weather Martigny-Combe (11 km)
- Weather Salvan (11 km)
Frequently asked questions about the weather: Lake Champex
What is the wind like on Lake Champex today?
The “Wind on the lake” section shows hourly average wind speed, gusts and direction for the next 24 hours, computed over the lake (1466 m).
Can you swim in Lake Champex?
At 1466 m the water stays cold all year (often below 15 °C in summer): swimming is for the brave, mostly in July–August. Check the air temperature, sunshine and UV index above to pick your slot.
What are the typical winds on Lake Champex?
Characteristic winds: vents de montagne, abrité. Storm warnings on Swiss lakes are signalled by flashing lights (40 flashes/min = caution, 90 = storm).
What is the warmest month in Lake Champex?
The warmest month in Lake Champex is July, averaging 14.2 °C (1991–2020 normal). The coldest is February at −1.4 °C.
How much does it rain in Lake Champex per year?
Lake Champex receives about 1710 mm of precipitation a year. The wettest month is November (193 mm), the driest September (99 mm).
When is the best time to visit Lake Champex?
For warmth and sunshine: July (14.2 °C on average, — h of sun). The coldest month is February (−1.4 °C). Check the 15-day forecast above for your dates.