About Lachen
Lachen is a Swiss municipality located in the canton of Schwyz (SZ), at 47.193° latitude and 8.858° longitude. The municipality is part of the central Alps, pronounced alpine climate with heavy winter snowfall. Also known as Lachen, Lachen benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Lachen
The climate in Lachen is characteristic of the central Alps, pronounced alpine climate with heavy winter snowfall. 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 Lachen and neighboring municipalities.
On this page you will find the detailed weather forecast for Lachen: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Lachen: 1991–2020 normals
In Lachen (413 m), the mean annual temperature is 10.2 °C. The warmest month is July (19.2 °C on average) and the coldest January (1.6 °C). About 1396 mm of precipitation falls per year, peaking in August (163 mm) with a minimum in February (81 mm). The sun shines for about 1705 hours a year, mostly in July (234 h). On average there are 68 frost days and 8 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 31.3 °C and the absolute minimum −9.8 °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 | 1.6 °C | 12.8 °C | −9.8 °C | 82 | 56 | 19 | 0 |
| Feb | 2.0 °C | 14.0 °C | −9.4 °C | 81 | 87 | 16 | 0 |
| Mar | 5.7 °C | 18.5 °C | −5.6 °C | 99 | 144 | 8 | 0 |
| Apr | 9.7 °C | 23.0 °C | −1.1 °C | 96 | 183 | 2 | 0 |
| May | 13.8 °C | 27.1 °C | 3.6 °C | 145 | 198 | 0 | 3 |
| Jun | 17.4 °C | 30.2 °C | 7.3 °C | 154 | 216 | 0 | 11 |
| Jul | 19.2 °C | 31.3 °C | 9.9 °C | 161 | 234 | 0 | 15 |
| Aug | 18.9 °C | 30.6 °C | 9.4 °C | 163 | 218 | 0 | 13 |
| Sep | 14.9 °C | 26.2 °C | 5.5 °C | 118 | 161 | 0 | 3 |
| Oct | 10.8 °C | 23.0 °C | 1.4 °C | 97 | 107 | 1 | 0 |
| Nov | 5.8 °C | 18.5 °C | −4.0 °C | 94 | 57 | 6 | 0 |
| Dec | 2.5 °C | 14.0 °C | −8.2 °C | 106 | 44 | 16 | 0 |
| Year | 10.2 °C | 31.3 °C | −9.8 °C | 1396 | 1705 | 68 | 46 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Einsiedeln (10 km, 911 m), Wädenswil (14 km, 485 m), Hörnli (21 km, 1133 m), adjusted to the elevation of Lachen (413 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Lachen:
- Weather Galgenen
- Weather Wangen (SZ)
- Weather Freienbach
- Weather Altendorf
- Weather Rapperswil-Jona
- Weather Schübelbach
- Weather Schmerikon
- Weather Rüti (ZH)
- Weather Vorderthal
- Weather Tuggen
- Weather Uznach
- Weather Stäfa
→ Nearby cities · Canton Schwyz
Frequently asked questions about weather in Lachen
What is the weather in Lachen today?
At the top of the page you will find the current temperature, precipitation and wind in Lachen, updated in real time.
What is the 15-day forecast for Lachen?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Lachen.
Will it rain tomorrow in Lachen?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Lachen.
What is the air quality in Lachen?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Lachen.
Are there weather alerts for Lachen?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Lachen located?
Lachen sits at around 413 m above sea level in the canton of Schwyz. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Lachen?
The warmest month in Lachen is July, averaging 19.2 °C (1991–2020 normal). The coldest is January at 1.6 °C.
How much does it rain in Lachen per year?
Lachen receives about 1396 mm of precipitation a year. The wettest month is August (163 mm), the driest February (81 mm).
When is the best time to visit Lachen?
For warmth and sunshine: July (19.2 °C on average, 234 h of sun). The coldest month is January (1.6 °C). Check the 15-day forecast above for your dates.