About Hermance
Hermance is a Swiss municipality located in the canton of Geneva (GE), at 46.295° latitude and 6.244° longitude. The municipality is part of the Lake Geneva region, temperate climate with lake influence, mild winters and warm summers. Also known as Hermance, Hermance benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Hermance
The climate in Hermance 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 Hermance and neighboring municipalities.
On this page you will find the detailed weather forecast for Hermance: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Hermance: 1991–2020 normals
In Hermance (405 m), the mean annual temperature is 11.2 °C. The warmest month is July (20.4 °C on average) and the coldest January (2.7 °C). About 995 mm of precipitation falls per year, peaking in December (100 mm) with a minimum in February (64 mm). The sun shines for about 1944 hours a year, mostly in July (269 h). On average there are 66 frost days and 15 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 32.6 °C and the absolute minimum −6.4 °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 | 2.7 °C | 12.4 °C | −6.4 °C | 82 | 67 | 18 | 0 |
| Feb | 3.3 °C | 14.3 °C | −5.8 °C | 64 | 104 | 16 | 0 |
| Mar | 6.9 °C | 18.9 °C | −3.1 °C | 68 | 169 | 8 | 0 |
| Apr | 10.4 °C | 22.9 °C | −0.3 °C | 68 | 193 | 1 | 0 |
| May | 14.5 °C | 27.3 °C | 3.9 °C | 84 | 215 | 0 | 4 |
| Jun | 18.3 °C | 30.9 °C | 7.7 °C | 84 | 245 | 0 | 13 |
| Jul | 20.4 °C | 32.6 °C | 10.0 °C | 83 | 269 | 0 | 20 |
| Aug | 20.0 °C | 32.1 °C | 9.4 °C | 83 | 245 | 0 | 18 |
| Sep | 15.8 °C | 27.1 °C | 5.9 °C | 88 | 191 | 0 | 5 |
| Oct | 11.6 °C | 22.2 °C | 1.8 °C | 98 | 124 | 1 | 0 |
| Nov | 6.5 °C | 16.9 °C | −2.5 °C | 94 | 70 | 6 | 0 |
| Dec | 3.4 °C | 13.0 °C | −5.4 °C | 100 | 52 | 15 | 0 |
| Year | 11.2 °C | 32.6 °C | −6.4 °C | 995 | 1944 | 66 | 60 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Genève / Cointrin (10 km, 411 m), Nyon / Changins (12 km, 458 m), La Dôle (18 km, 1670 m), adjusted to the elevation of Hermance (405 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Hermance:
- Weather Anières
- Weather Corsier (GE)
- Weather Founex
- Weather Coppet
- Weather Gy
- Weather Tannay
- Weather Meinier
- Weather Collonge-Bellerive
- Weather Mies
- Weather Jussy
- Weather Commugny
- Weather Versoix
→ Nearby cities · Canton Geneva
Frequently asked questions about weather in Hermance
What is the weather in Hermance today?
At the top of the page you will find the current temperature, precipitation and wind in Hermance, updated in real time.
What is the 15-day forecast for Hermance?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Hermance.
Will it rain tomorrow in Hermance?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Hermance.
What is the air quality in Hermance?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Hermance.
Are there weather alerts for Hermance?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Hermance located?
Hermance sits at around 405 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 Hermance?
The warmest month in Hermance is July, averaging 20.4 °C (1991–2020 normal). The coldest is January at 2.7 °C.
How much does it rain in Hermance per year?
Hermance receives about 995 mm of precipitation a year. The wettest month is December (100 mm), the driest February (64 mm).
When is the best time to visit Hermance?
For warmth and sunshine: July (20.4 °C on average, 269 h of sun). The coldest month is January (2.7 °C). Check the 15-day forecast above for your dates.