What is the weather in Au (SG) today?

At the top of the page you will find the current temperature, precipitation and wind in Au (SG), updated in real time.

What is the 15-day forecast for Au (SG)?

The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Au (SG).

Will it rain tomorrow in Au (SG)?

Check the 48-hour hourly forecast to see exactly when precipitation is expected in Au (SG).

What is the air quality in Au (SG)?

The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Au (SG).

Are there weather alerts for Au (SG)?

Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.

At what altitude is Au (SG) located?

Au (SG) sits at around 403 m above sea level in the canton of St. Gallen. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.

What is the warmest month in Au (SG)?

The warmest month in Au (SG) is July, averaging 19.3 °C (1991–2020 normal). The coldest is January at 1.5 °C.

How much does it rain in Au (SG) per year?

Au (SG) receives about 1357 mm of precipitation a year. The wettest month is August (159 mm), the driest February (76 mm).

When is the best time to visit Au (SG)?

For warmth and sunshine: July (19.3 °C on average, — h of sun). The coldest month is January (1.5 °C). Check the 15-day forecast above for your dates.

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Home › St. Gallen › Au (SG)

Weather in Au (SG)

St. Gallen, 403 m · continuously updated

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

Rheintaler Binnenkanal: 15.3 °C at St.Margrethen river temperature · FOEN gauge 2.4 km away · 27.09. 00h

Temperature · last 4 and next 28 hours

Au (SG) weather: the next 24 hours

Updated hourly.

Au (SG) weather hour by hour (48 h)

Au (SG) 15-day forecast

Two-week trend.

Au (SG) 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 Au (SG)

Neighbouring municipalities, as the crow flies.

Balgach3 km Widnau3 km Berneck4 km St. Margrethen5 km Rheineck6 km Diepoldsau6 km Walzenhausen6 km Rebstein6 km

7-day forecast for Au (SG)

Today (Sunday 27 Sep) in Au (SG): sunny, 13 to 23 °C, precipitation 0.0 mm (0 %), wind up to 8 km/h. Tomorrow: partly cloudy, 15 to 26 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	sunny	13 °C	23 °C	0.0 mm	8 km/h
Tomorrow	partly cloudy	15 °C	26 °C	0.0 mm	7 km/h
Tue 29 Sep	overcast	13 °C	25 °C	0.0 mm	7 km/h
Wed 30 Sep	overcast	16 °C	25 °C	0.0 mm	6 km/h
Thu 1 Oct	light rain	15 °C	21 °C	4.2 mm	7 km/h
Fri 2 Oct	fog	14 °C	20 °C	0.0 mm	5 km/h
Sat 3 Oct	fog	13 °C	21 °C	0.0 mm	6 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 403 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Au (SG)

Sunday 27 Sep in Au (SG), hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 13 °C around 07:00, high 24 °C around 17:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	15 °C	6 km/h
01:00	sunny	15 °C	5 km/h
02:00	sunny	14 °C	3 km/h
03:00	sunny	14 °C	2 km/h
04:00	sunny	14 °C	0 km/h
05:00	sunny	13 °C	0 km/h
06:00	sunny	13 °C	1 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	16 °C	3 km/h
11:00	sunny	18 °C	5 km/h
12:00	sunny	19 °C	6 km/h
13:00	sunny	21 °C	7 km/h
14:00	sunny	22 °C	8 km/h
15:00	sunny	23 °C	7 km/h
16:00	sunny	24 °C	5 km/h
17:00	sunny	24 °C	3 km/h
18:00	sunny	24 °C	2 km/h
19:00	sunny	20 °C	7 km/h
20:00	sunny	19 °C	7 km/h
21:00	sunny	18 °C	7 km/h
22:00	sunny	18 °C	8 km/h
23:00	sunny	18 °C	7 km/h

Hourly forecast issued 27.09.2026 for Au (SG) (403 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Au (SG) weather tomorrow

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

Au (SG) weekend weather

This weekend in Au (SG): Saturday fog, 13 to 21 °C; Sunday sunny, 13 to 23 °C.

Will it rain in Au (SG) this week?

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

The best day to go out in Au (SG)

The best day of the next 7 in Au (SG): Sunday 27 Sep, sunny, up to 23 °C.

The last 7 days in Au (SG)

From 20 Sep to 26 Sep: 15.7 °C on average, 1.0 °C above the September normal (14.7 °C), 0 mm of precipitation (7-day normal: 28 mm). Warmest day: sunday 20 Sep (24 °C); coolest night: wednesday 23 Sep (8 °C).

Day	Min	Max
Sun 20 Sep	13 °C	24 °C
Mon 21 Sep	12 °C	20 °C
Tue 22 Sep	8 °C	19 °C
Wed 23 Sep	8 °C	19 °C
Thu 24 Sep	12 °C	21 °C
Fri 25 Sep	9 °C	20 °C
Sat 26 Sep	11 °C	23 °C

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

Climate of Au (SG): 1991–2020 normals

In Au (SG) (403 m), the mean annual temperature is 10.2 °C. The warmest month is July (19.3 °C on average) and the coldest January (1.5 °C). About 1357 mm of precipitation falls per year, peaking in August (159 mm) with a minimum in February (76 mm). On average there are 78 frost days and 6 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 30.9 °C and the absolute minimum −8.8 °C.

10.2 °CMean annual temperature

1357 mmPrecipitation per year

78Frost days per year

42Summer 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	1.5 °C	12.8 °C	−8.8 °C	85	20	0
Feb	2.2 °C	14.3 °C	−7.9 °C	76	18	0
Mar	5.7 °C	18.7 °C	−4.9 °C	95	12	0
Apr	9.7 °C	22.7 °C	−1.6 °C	93	3	0
May	14.1 °C	27.0 °C	3.5 °C	134	0	3
Jun	17.6 °C	29.9 °C	7.5 °C	146	0	10
Jul	19.3 °C	30.9 °C	10.0 °C	154	0	14
Aug	18.8 °C	30.1 °C	9.3 °C	159	0	12
Sep	14.7 °C	25.6 °C	5.5 °C	121	0	2
Oct	10.7 °C	22.2 °C	1.4 °C	97	1	0
Nov	5.7 °C	17.8 °C	−3.9 °C	91	8	0
Dec	2.6 °C	14.6 °C	−7.3 °C	104	17	0
Year	10.2 °C	30.9 °C	−8.8 °C	1357	78	42

Source: MeteoSwiss open data (1991–2020 normals) — stations Altenrhein (8 km, 398 m), St. Gallen (18 km, 776 m), Säntis (30 km, 2501 m), adjusted to the elevation of Au (SG) (403 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.