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.

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Home › Schwyz › Lachen

Weather in Lachen

Schwyz, 413 m · continuously updated

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Wind: –
Humidity: –
Rain ahead: –
Sunset: –

Temperature · last 4 and next 28 hours

Lachen weather: the next 24 hours

Updated hourly.

Lachen weather hour by hour (48 h)

Lachen 15-day forecast

Two-week trend.

Lachen 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 Lachen

Neighbouring municipalities, as the crow flies.

Galgenen1 km Wangen (SZ)1 km Freienbach5 km Altendorf5 km Rapperswil-Jona6 km Schübelbach7 km Schmerikon7 km Rüti (ZH)7 km

7-day forecast for Lachen

Today (Sunday 27 Sep) in Lachen: sunny, 12 to 25 °C, precipitation 0.0 mm (0 %), wind up to 7 km/h. Tomorrow: partly cloudy, 15 to 26 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	sunny	12 °C	25 °C	0.0 mm	7 km/h
Tomorrow	partly cloudy	15 °C	26 °C	0.0 mm	7 km/h
Tue 29 Sep	overcast	15 °C	25 °C	0.0 mm	7 km/h
Wed 30 Sep	overcast	17 °C	25 °C	0.0 mm	8 km/h
Thu 1 Oct	light rain	16 °C	18 °C	3.9 mm	4 km/h
Fri 2 Oct	fog	15 °C	20 °C	0.3 mm	7 km/h
Sat 3 Oct	fog	14 °C	21 °C	0.0 mm	6 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 413 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Lachen

Sunday 27 Sep in Lachen, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 13 °C around 07:00, high 26 °C around 17:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	15 °C	5 km/h
01:00	sunny	15 °C	4 km/h
02:00	sunny	15 °C	3 km/h
03:00	sunny	14 °C	2 km/h
04:00	sunny	14 °C	1 km/h
05:00	sunny	14 °C	1 km/h
06:00	sunny	14 °C	2 km/h
07:00	sunny	13 °C	1 km/h
08:00	sunny	14 °C	1 km/h
09:00	sunny	14 °C	2 km/h
10:00	sunny	17 °C	1 km/h
11:00	sunny	19 °C	1 km/h
12:00	sunny	20 °C	3 km/h
13:00	sunny	22 °C	3 km/h
14:00	sunny	24 °C	4 km/h
15:00	sunny	25 °C	2 km/h
16:00	sunny	26 °C	0 km/h
17:00	sunny	26 °C	3 km/h
18:00	sunny	24 °C	5 km/h
19:00	sunny	22 °C	5 km/h
20:00	sunny	18 °C	7 km/h
21:00	sunny	16 °C	4 km/h
22:00	sunny	16 °C	3 km/h
23:00	sunny	17 °C	4 km/h

Hourly forecast issued 27.09.2026 for Lachen (413 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Lachen weather tomorrow

Tomorrow, Monday 28 Sep, in Lachen: partly cloudy, 15 to 26 °C, wind up to 7 km/h. No precipitation expected.

Lachen weekend weather

This weekend in Lachen: Saturday fog, 14 to 21 °C; Sunday sunny, 12 to 25 °C.

Will it rain in Lachen this week?

Yes: 1 day with precipitation is expected in Lachen over the next 7 days, 4.2 mm in total. Wettest day: Thursday 1 Oct (3.9 mm).

The best day to go out in Lachen

The best day of the next 7 in Lachen: Sunday 27 Sep, sunny, up to 25 °C.

The last 7 days in Lachen

From 20 Sep to 26 Sep: 16.9 °C on average, 2.0 °C above the September normal (14.9 °C), 0 mm of precipitation (7-day normal: 27 mm). Warmest day: saturday 26 Sep (25 °C); coolest night: wednesday 23 Sep (10 °C).

Day	Min	Max
Sun 20 Sep	14 °C	24 °C
Mon 21 Sep	14 °C	21 °C
Tue 22 Sep	11 °C	21 °C
Wed 23 Sep	10 °C	20 °C
Thu 24 Sep	12 °C	22 °C
Fri 25 Sep	11 °C	21 °C
Sat 26 Sep	12 °C	25 °C

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

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.

10.2 °CMean annual temperature

1396 mmPrecipitation per year

1705 hSunshine hours per year

68Frost days per year

46Summer days (≥ 25 °C)

JFMAMJJASOND

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.