About Thônex
Thônex is a Swiss municipality located in the canton of Geneva (GE), at 46.195° latitude and 6.208° longitude. The municipality is part of the Lake Geneva region, temperate climate with lake influence, mild winters and warm summers. Also known as Thônex, Thônex benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Thônex
The climate in Thônex 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 Thônex and neighboring municipalities.
On this page you will find the detailed weather forecast for Thônex: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Thônex: 1991–2020 normals
In Thônex (423 m), the mean annual temperature is 11.1 °C. The warmest month is July (20.5 °C on average) and the coldest January (2.4 °C). About 959 mm of precipitation falls per year, peaking in October (96 mm) with a minimum in February (59 mm). The sun shines for about 1933 hours a year, mostly in July (270 h). On average there are 68 frost days and 17 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 33.0 °C and the absolute minimum −6.7 °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 | 2.4 °C | 12.3 °C | −6.7 °C | 76 | 65 | 19 | 0 |
| Feb | 3.1 °C | 14.4 °C | −6.1 °C | 59 | 102 | 17 | 0 |
| Mar | 6.8 °C | 19.3 °C | −3.5 °C | 65 | 167 | 8 | 0 |
| Apr | 10.4 °C | 23.4 °C | −0.5 °C | 67 | 192 | 1 | 1 |
| May | 14.5 °C | 27.7 °C | 3.6 °C | 80 | 215 | 0 | 4 |
| Jun | 18.4 °C | 31.3 °C | 7.5 °C | 83 | 246 | 0 | 14 |
| Jul | 20.5 °C | 33.0 °C | 9.8 °C | 80 | 270 | 0 | 21 |
| Aug | 20.0 °C | 32.5 °C | 9.1 °C | 82 | 246 | 0 | 18 |
| Sep | 15.8 °C | 27.5 °C | 5.5 °C | 88 | 190 | 0 | 6 |
| Oct | 11.4 °C | 22.2 °C | 1.4 °C | 96 | 122 | 1 | 0 |
| Nov | 6.3 °C | 16.9 °C | −3.0 °C | 90 | 68 | 7 | 0 |
| Dec | 3.1 °C | 12.8 °C | −5.8 °C | 94 | 50 | 15 | 0 |
| Year | 11.1 °C | 33.0 °C | −6.7 °C | 959 | 1933 | 68 | 63 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Genève / Cointrin (8 km, 411 m), Nyon / Changins (23 km, 458 m), La Dôle (27 km, 1670 m), adjusted to the elevation of Thônex (423 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Thônex:
- Weather Chêne-Bourg
- Weather Chêne-Bougeries
- Weather Puplinge
- Weather Vandoeuvres
- Weather Cologny
- Weather Choulex
- Weather Veyrier
- Weather Presinge
- Weather Genève
- Weather Carouge (GE)
- Weather Meinier
- Weather Troinex
→ Nearby cities · Canton Geneva
Frequently asked questions about weather in Thônex
What is the weather in Thônex today?
At the top of the page you will find the current temperature, precipitation and wind in Thônex, updated in real time.
What is the 15-day forecast for Thônex?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Thônex.
Will it rain tomorrow in Thônex?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Thônex.
What is the air quality in Thônex?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Thônex.
Are there weather alerts for Thônex?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Thônex located?
Thônex sits at around 423 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 Thônex?
The warmest month in Thônex is July, averaging 20.5 °C (1991–2020 normal). The coldest is January at 2.4 °C.
How much does it rain in Thônex per year?
Thônex receives about 959 mm of precipitation a year. The wettest month is October (96 mm), the driest February (59 mm).
When is the best time to visit Thônex?
For warmth and sunshine: July (20.5 °C on average, 270 h of sun). The coldest month is January (2.4 °C). Check the 15-day forecast above for your dates.