About Le Grand-Saconnex
Le Grand-Saconnex is a Swiss municipality located in the canton of Geneva (GE), at 46.226° latitude and 6.124° longitude. The municipality is part of the Lake Geneva region, temperate climate with lake influence, mild winters and warm summers. Also known as Le Grand-Saconnex, Le Grand-Saconnex benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Le Grand-Saconnex
The climate in Le Grand-Saconnex 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 Le Grand-Saconnex and neighboring municipalities.
On this page you will find the detailed weather forecast for Le Grand-Saconnex: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Le Grand-Saconnex: 1991–2020 normals
In Le Grand-Saconnex (435 m), the mean annual temperature is 11.0 °C. The warmest month is July (20.6 °C on average) and the coldest January (2.1 °C). About 932 mm of precipitation falls per year, peaking in October (94 mm) with a minimum in February (56 mm). The sun shines for about 1932 hours a year, mostly in July (271 h). On average there are 69 frost days and 18 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 33.3 °C and the absolute minimum −7.0 °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 | 2.1 °C | 12.2 °C | −7.0 °C | 73 | 64 | 19 | 0 |
| Feb | 2.9 °C | 14.5 °C | −6.3 °C | 56 | 101 | 17 | 0 |
| Mar | 6.8 °C | 19.6 °C | −3.6 °C | 62 | 167 | 8 | 0 |
| Apr | 10.5 °C | 23.6 °C | −0.6 °C | 66 | 192 | 1 | 1 |
| May | 14.6 °C | 27.9 °C | 3.4 °C | 77 | 216 | 0 | 4 |
| Jun | 18.5 °C | 31.6 °C | 7.3 °C | 82 | 247 | 0 | 14 |
| Jul | 20.6 °C | 33.3 °C | 9.6 °C | 78 | 271 | 0 | 21 |
| Aug | 20.0 °C | 32.8 °C | 8.9 °C | 80 | 246 | 0 | 18 |
| Sep | 15.7 °C | 27.7 °C | 5.3 °C | 87 | 190 | 0 | 6 |
| Oct | 11.3 °C | 22.2 °C | 1.2 °C | 94 | 121 | 1 | 0 |
| Nov | 6.1 °C | 16.8 °C | −3.3 °C | 88 | 68 | 7 | 0 |
| Dec | 2.9 °C | 12.5 °C | −6.0 °C | 89 | 49 | 15 | 0 |
| Year | 11.0 °C | 33.3 °C | −7.0 °C | 932 | 1932 | 69 | 64 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Genève / Cointrin (2 km, 411 m), Nyon / Changins (21 km, 458 m), La Dôle (22 km, 1670 m), adjusted to the elevation of Le Grand-Saconnex (435 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Le Grand-Saconnex:
- Weather Pregny-Chambésy
- Weather Vernier
- Weather Genève
- Weather Bellevue
- Weather Meyrin
- Weather Satigny
- Weather Cologny
- Weather Genthod
- Weather Carouge (GE)
- Weather Lancy
- Weather Chêne-Bougeries
- Weather Onex
→ Nearby cities · Canton Geneva
Frequently asked questions about weather in Le Grand-Saconnex
What is the weather in Le Grand-Saconnex today?
At the top of the page you will find the current temperature, precipitation and wind in Le Grand-Saconnex, updated in real time.
What is the 15-day forecast for Le Grand-Saconnex?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Le Grand-Saconnex.
Will it rain tomorrow in Le Grand-Saconnex?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Le Grand-Saconnex.
What is the air quality in Le Grand-Saconnex?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Le Grand-Saconnex.
Are there weather alerts for Le Grand-Saconnex?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Le Grand-Saconnex located?
Le Grand-Saconnex sits at around 435 m above sea level in the canton of Geneva. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Le Grand-Saconnex?
The warmest month in Le Grand-Saconnex is July, averaging 20.6 °C (1991–2020 normal). The coldest is January at 2.1 °C.
How much does it rain in Le Grand-Saconnex per year?
Le Grand-Saconnex receives about 932 mm of precipitation a year. The wettest month is October (94 mm), the driest February (56 mm).
When is the best time to visit Le Grand-Saconnex?
For warmth and sunshine: July (20.6 °C on average, 271 h of sun). The coldest month is January (2.1 °C). Check the 15-day forecast above for your dates.