About Illgau
Illgau is a Swiss municipality located in the canton of Schwyz (SZ), at 46.997° latitude and 8.736° longitude. The municipality is part of the central Alps, pronounced alpine climate with heavy winter snowfall. Also known as Illgau, Illgau benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Illgau
The climate in Illgau 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 Illgau and neighboring municipalities.
On this page you will find the detailed weather forecast for Illgau: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Illgau: 1991–2020 normals
In Illgau (1094 m), the mean annual temperature is 6.5 °C. The warmest month is July (15.4 °C on average) and the coldest January (−2.2 °C). About 1571 mm of precipitation falls per year, peaking in August (190 mm) with a minimum in February (87 mm). On average there are 123 frost days and 1 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 27.7 °C and the absolute minimum −13.2 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Frost days | Summer days |
|---|---|---|---|---|---|---|
| Jan | −2.2 °C | 9.6 °C | −13.2 °C | 92 | 27 | 0 |
| Feb | −1.6 °C | 10.4 °C | −12.9 °C | 87 | 24 | 0 |
| Mar | 2.1 °C | 15.1 °C | −9.2 °C | 105 | 19 | 0 |
| Apr | 6.1 °C | 19.3 °C | −5.1 °C | 108 | 9 | 0 |
| May | 10.2 °C | 23.6 °C | −0.3 °C | 160 | 1 | 0 |
| Jun | 13.7 °C | 26.8 °C | 3.5 °C | 177 | 0 | 4 |
| Jul | 15.4 °C | 27.7 °C | 5.9 °C | 183 | 0 | 6 |
| Aug | 15.1 °C | 26.9 °C | 5.4 °C | 190 | 0 | 6 |
| Sep | 11.1 °C | 22.6 °C | 1.5 °C | 136 | 0 | 0 |
| Oct | 7.0 °C | 19.4 °C | −2.8 °C | 110 | 3 | 0 |
| Nov | 2.0 °C | 15.0 °C | −8.0 °C | 108 | 14 | 0 |
| Dec | −1.4 °C | 10.8 °C | −11.9 °C | 116 | 25 | 0 |
| Year | 6.5 °C | 27.7 °C | −13.2 °C | 1571 | 123 | 16 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Altdorf (15 km, 438 m), Einsiedeln (15 km, 911 m), Wädenswil (25 km, 485 m), adjusted to the elevation of Illgau (1094 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Illgau:
- Weather Muotathal
- Weather Morschach
- Weather Alpthal
- Weather Riemenstalden
- Weather Oberiberg
- Weather Unteriberg
- Weather Bürglen (UR)
- Weather Schwyz
- Weather Sisikon
- Weather Ingenbohl
- Weather Flüelen
- Weather Steinen
→ Nearby cities · Canton Schwyz
Frequently asked questions about weather in Illgau
What is the weather in Illgau today?
At the top of the page you will find the current temperature, precipitation and wind in Illgau, updated in real time.
What is the 15-day forecast for Illgau?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Illgau.
Will it rain tomorrow in Illgau?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Illgau.
What is the air quality in Illgau?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Illgau.
Are there weather alerts for Illgau?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Illgau located?
Illgau sits at around 1094 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 Illgau?
The warmest month in Illgau is July, averaging 15.4 °C (1991–2020 normal). The coldest is January at −2.2 °C.
How much does it rain in Illgau per year?
Illgau receives about 1571 mm of precipitation a year. The wettest month is August (190 mm), the driest February (87 mm).
When is the best time to visit Illgau?
For warmth and sunshine: July (15.4 °C on average, — h of sun). The coldest month is January (−2.2 °C). Check the 15-day forecast above for your dates.