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.

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Home › Schwyz › Illgau

Weather in Illgau

Schwyz, 1094 m · continuously updated

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Wind: –
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Rain ahead: –
Sunset: –

Schlichenden Brünnen: 6.5 °C at Muotathal river temperature · FOEN gauge 4.6 km away · 27.09. 00h

Temperature · last 4 and next 28 hours

Illgau weather: the next 24 hours

Updated hourly.

Illgau weather hour by hour (48 h)

Illgau 15-day forecast

Two-week trend.

Illgau weekend weather Rain radar

Sun and golden hours

Sunrise –, golden light until –

Sunset –, golden light from –

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Air quality

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European index, measured continuously.

UV index

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Daily maximum — protection advised from 3.

Freezing level

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Snow settles about 300 m below it.

Around Illgau

Neighbouring municipalities, as the crow flies.

Muotathal4 km Morschach6 km Alpthal7 km Riemenstalden7 km Oberiberg7 km Unteriberg8 km Bürglen (UR)9 km Schwyz9 km

7-day forecast for Illgau

Today (Sunday 27 Sep) in Illgau: sunny, 15 to 21 °C, precipitation 0.0 mm (0 %), wind up to 10 km/h. Tomorrow: overcast, 17 to 22 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	sunny	15 °C	21 °C	0.0 mm	10 km/h
Tomorrow	overcast	17 °C	22 °C	0.0 mm	12 km/h
Tue 29 Sep	overcast	14 °C	22 °C	0.0 mm	9 km/h
Wed 30 Sep	overcast	16 °C	23 °C	0.0 mm	9 km/h
Thu 1 Oct	light rain	13 °C	16 °C	4.1 mm	6 km/h
Fri 2 Oct	fog	12 °C	16 °C	0.0 mm	7 km/h
Sat 3 Oct	overcast	11 °C	17 °C	0.0 mm	8 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 1094 m). The interactive block at the top refreshes hourly and covers 16 days.

No rain expected in Illgau today or tomorrow. The 15-minute detail for the next two hours is shown on demand.

Hourly weather in Illgau

Sunday 27 Sep in Illgau, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 15 °C around 00:00, high 21 °C around 15:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	15 °C	8 km/h
01:00	sunny	15 °C	9 km/h
02:00	sunny	16 °C	9 km/h
03:00	sunny	16 °C	9 km/h
04:00	sunny	16 °C	9 km/h
05:00	sunny	16 °C	8 km/h
06:00	sunny	15 °C	9 km/h
07:00	sunny	16 °C	9 km/h
08:00	sunny	16 °C	8 km/h
09:00	sunny	17 °C	4 km/h
10:00	sunny	17 °C	1 km/h
11:00	sunny	18 °C	0 km/h
12:00	sunny	20 °C	4 km/h
13:00	sunny	21 °C	8 km/h
14:00	sunny	21 °C	9 km/h
15:00	sunny	21 °C	9 km/h
16:00	sunny	21 °C	6 km/h
17:00	mostly sunny	21 °C	4 km/h
18:00	mostly sunny	20 °C	0 km/h
19:00	sunny	18 °C	3 km/h
20:00	sunny	17 °C	9 km/h
21:00	sunny	18 °C	9 km/h
22:00	sunny	18 °C	10 km/h
23:00	sunny	17 °C	9 km/h

Hourly forecast issued 27.09.2026 for Illgau (1094 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Illgau weather tomorrow

Tomorrow, Monday 28 Sep, in Illgau: overcast, 17 to 22 °C, wind up to 12 km/h. No precipitation expected.

Illgau weekend weather

This weekend in Illgau: Saturday overcast, 11 to 17 °C; Sunday sunny, 15 to 21 °C.

Will it rain in Illgau this week?

Yes: 1 day with precipitation is expected in Illgau over the next 7 days, 4.1 mm in total. Wettest day: Thursday 1 Oct (4.1 mm).

The best day to go out in Illgau

The best day of the next 7 in Illgau: Sunday 27 Sep, sunny, up to 21 °C.

The last 7 days in Illgau

From 20 Sep to 26 Sep: 13.6 °C on average, 2.5 °C above the September normal (11.1 °C), 0 mm of precipitation (7-day normal: 32 mm). Warmest day: saturday 26 Sep (20 °C); coolest night: wednesday 23 Sep (6 °C).

Day	Min	Max
Sun 20 Sep	12 °C	19 °C
Mon 21 Sep	11 °C	16 °C
Tue 22 Sep	7 °C	15 °C
Wed 23 Sep	6 °C	16 °C
Thu 24 Sep	11 °C	17 °C
Fri 25 Sep	10 °C	17 °C
Sat 26 Sep	13 °C	20 °C

Open-Meteo analyses of the last 7 days (models and assimilated observations), MeteoSwiss 1991–2020 normals. Updated nightly.

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.

6.5 °CMean annual temperature

1571 mmPrecipitation per year

123Frost days per year

16Summer days (≥ 25 °C)

JFMAMJJASOND

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.