About Trélex
Trélex is a Swiss municipality located in the canton of Vaud (VD), at 46.419° latitude and 6.195° longitude. The municipality is part of the Lake Geneva region, temperate climate with lake influence, mild winters and warm summers. Also known as Trélex, Trélex benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Trélex
The climate in Trélex is characteristic of the Lake Geneva region, temperate climate with lake influence, mild winters and warm summers. Temperatures, precipitation and wind conditions vary throughout the year with local features linked to altitude and surrounding terrain. Our data comes from official weather stations and real-time Netatmo sensors for Trélex and neighboring municipalities.
On this page you will find the detailed weather forecast for Trélex: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Trélex: 1991–2020 normals
In Trélex (554 m), the mean annual temperature is 10.3 °C. The warmest month is July (19.5 °C on average) and the coldest January (1.8 °C). About 1064 mm of precipitation falls per year, peaking in December (109 mm) with a minimum in February (70 mm). The sun shines for about 1959 hours a year, mostly in July (266 h). On average there are 62 frost days and 11 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 31.3 °C and the absolute minimum −6.9 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Sunshine (h) | Frost days | Summer days |
|---|---|---|---|---|---|---|---|
| Jan | 1.8 °C | 11.2 °C | −6.9 °C | 89 | 71 | 18 | 0 |
| Feb | 2.4 °C | 13.0 °C | −6.4 °C | 70 | 108 | 15 | 0 |
| Mar | 6.1 °C | 17.4 °C | −3.6 °C | 72 | 171 | 7 | 0 |
| Apr | 9.6 °C | 21.5 °C | −1.0 °C | 71 | 193 | 1 | 0 |
| May | 13.6 °C | 25.9 °C | 3.3 °C | 91 | 214 | 0 | 3 |
| Jun | 17.3 °C | 29.6 °C | 7.0 °C | 88 | 243 | 0 | 12 |
| Jul | 19.5 °C | 31.3 °C | 9.5 °C | 89 | 266 | 0 | 18 |
| Aug | 19.1 °C | 30.8 °C | 8.9 °C | 88 | 244 | 0 | 16 |
| Sep | 15.0 °C | 25.8 °C | 5.4 °C | 90 | 192 | 0 | 4 |
| Oct | 10.7 °C | 20.9 °C | 1.3 °C | 104 | 127 | 1 | 0 |
| Nov | 5.7 °C | 15.7 °C | −2.7 °C | 102 | 74 | 6 | 0 |
| Dec | 2.6 °C | 11.9 °C | −6.0 °C | 109 | 56 | 14 | 0 |
| Year | 10.3 °C | 31.3 °C | −6.9 °C | 1064 | 1959 | 62 | 54 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Nyon / Changins (3 km, 458 m), La Dôle (7 km, 1670 m), Genève / Cointrin (20 km, 411 m), adjusted to the elevation of Trélex (554 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Trélex:
- Weather Givrins
- Weather Grens
- Weather Genolier
- Weather Signy-Avenex
- Weather Duillier
- Weather Gingins
- Weather Coinsins
- Weather Chéserex
- Weather La Rippe
- Weather Vich
- Weather Eysins
- Weather Borex
Frequently asked questions about weather in Trélex
What is the weather in Trélex today?
At the top of the page you will find the current temperature, precipitation and wind in Trélex, updated in real time.
What is the 15-day forecast for Trélex?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Trélex.
Will it rain tomorrow in Trélex?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Trélex.
What is the air quality in Trélex?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Trélex.
Are there weather alerts for Trélex?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Trélex located?
Trélex sits at around 554 m above sea level in the canton of Vaud. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Trélex?
The warmest month in Trélex is July, averaging 19.5 °C (1991–2020 normal). The coldest is January at 1.8 °C.
How much does it rain in Trélex per year?
Trélex receives about 1064 mm of precipitation a year. The wettest month is December (109 mm), the driest February (70 mm).
When is the best time to visit Trélex?
For warmth and sunshine: July (19.5 °C on average, 266 h of sun). The coldest month is January (1.8 °C). Check the 15-day forecast above for your dates.