What is the weather in Aristau today?

At the top of the page you will find the current temperature, precipitation and wind in Aristau, updated in real time.

What is the 15-day forecast for Aristau?

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

Will it rain tomorrow in Aristau?

Check the 48-hour hourly forecast to see exactly when precipitation is expected in Aristau.

What is the air quality in Aristau?

The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Aristau.

Are there weather alerts for Aristau?

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

At what altitude is Aristau located?

Aristau sits at around 380 m above sea level in the canton of Aargau. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.

What is the warmest month in Aristau?

The warmest month in Aristau is July, averaging 19.9 °C (1991–2020 normal). The coldest is January at 1.7 °C.

How much does it rain in Aristau per year?

Aristau receives about 1018 mm of precipitation a year. The wettest month is July (121 mm), the driest February (52 mm).

When is the best time to visit Aristau?

For warmth and sunshine: July (19.9 °C on average, 232 h of sun). The coldest month is January (1.7 °C). Check the 15-day forecast above for your dates.

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Weather in Aristau

Aargau, 380 m · continuously updated

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

Temperature · last 4 and next 28 hours

Aristau weather: the next 24 hours

Updated hourly.

Aristau weather hour by hour (48 h)

Aristau 15-day forecast

Two-week trend.

Aristau 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 Aristau

Neighbouring municipalities, as the crow flies.

Jonen3 km Rottenschwil3 km Muri (AG)3 km Besenbüren3 km Merenschwand3 km Ottenbach3 km Oberlunkhofen3 km Unterlunkhofen4 km

7-day forecast for Aristau

Today (Sunday 27 Sep) in Aristau: mostly sunny, 8 to 26 °C, precipitation 0.0 mm (0 %), wind up to 8 km/h. Tomorrow: partly cloudy, 10 to 28 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	mostly sunny	8 °C	26 °C	0.0 mm	8 km/h
Tomorrow	partly cloudy	10 °C	28 °C	0.0 mm	8 km/h
Tue 29 Sep	overcast	12 °C	26 °C	0.0 mm	5 km/h
Wed 30 Sep	overcast	16 °C	25 °C	0.0 mm	6 km/h
Thu 1 Oct	light rain	15 °C	18 °C	2.4 mm	4 km/h
Fri 2 Oct	fog	14 °C	21 °C	0.0 mm	8 km/h
Sat 3 Oct	fog	14 °C	21 °C	0.0 mm	4 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 380 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Aristau

Sunday 27 Sep in Aristau, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 9 °C around 08:00, high 26 °C around 16:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	14 °C	1 km/h
01:00	sunny	12 °C	2 km/h
02:00	sunny	12 °C	2 km/h
03:00	sunny	11 °C	2 km/h
04:00	sunny	10 °C	3 km/h
05:00	sunny	9 °C	3 km/h
06:00	sunny	9 °C	2 km/h
07:00	sunny	9 °C	4 km/h
08:00	sunny	9 °C	3 km/h
09:00	sunny	11 °C	3 km/h
10:00	sunny	15 °C	2 km/h
11:00	sunny	19 °C	2 km/h
12:00	sunny	22 °C	2 km/h
13:00	sunny	24 °C	0 km/h
14:00	sunny	25 °C	3 km/h
15:00	sunny	26 °C	6 km/h
16:00	sunny	26 °C	8 km/h
17:00	sunny	26 °C	9 km/h
18:00	mostly sunny	25 °C	6 km/h
19:00	sunny	22 °C	3 km/h
20:00	sunny	18 °C	2 km/h
21:00	sunny	17 °C	1 km/h
22:00	sunny	16 °C	2 km/h
23:00	mostly sunny	15 °C	2 km/h

Hourly forecast issued 27.09.2026 for Aristau (380 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Aristau weather tomorrow

Tomorrow, Monday 28 Sep, in Aristau: partly cloudy, 10 to 28 °C, wind up to 8 km/h. No precipitation expected.

Aristau weekend weather

This weekend in Aristau: Saturday fog, 14 to 21 °C; Sunday mostly sunny, 8 to 26 °C.

Will it rain in Aristau this week?

Yes: 1 day with precipitation is expected in Aristau over the next 7 days, 2.4 mm in total. Wettest day: Thursday 1 Oct (2.4 mm).

The best day to go out in Aristau

The best day of the next 7 in Aristau: Sunday 27 Sep, mostly sunny, up to 26 °C.

Among the 155 municipalities of canton Aargau covered by the MeteoSwiss 1991-2020 normals, Aristau ranks 87 for annual precipitation (1018 mm) and 28 for sunshine (1666 hours per year). July's hottest day averages 32.7 °C; January's coldest night drops to -7.7 °C.

The last 7 days in Aristau

From 20 Sep to 26 Sep: 15.6 °C on average, in line with the September normal (15.2 °C), 0 mm of precipitation (7-day normal: 19 mm). Warmest day: sunday 20 Sep (26 °C); coolest night: friday 25 Sep (7 °C).

Day	Min	Max
Sun 20 Sep	10 °C	26 °C
Mon 21 Sep	13 °C	21 °C
Tue 22 Sep	8 °C	21 °C
Wed 23 Sep	7 °C	21 °C
Thu 24 Sep	8 °C	22 °C
Fri 25 Sep	7 °C	22 °C
Sat 26 Sep	7 °C	25 °C

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

Climate of Aristau: 1991–2020 normals

In Aristau (380 m), the mean annual temperature is 10.6 °C. The warmest month is July (19.9 °C on average) and the coldest January (1.7 °C). About 1018 mm of precipitation falls per year, peaking in July (121 mm) with a minimum in February (52 mm). The sun shines for about 1666 hours a year, mostly in July (232 h). On average there are 77 frost days and 10 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 32.7 °C and the absolute minimum −7.7 °C.

10.6 °CMean annual temperature

1018 mmPrecipitation per year

1666 hSunshine hours per year

77Frost days per year

50Summer 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	1.7 °C	12.2 °C	−7.7 °C	54	55	20	0
Feb	2.5 °C	14.2 °C	−7.4 °C	52	84	18	0
Mar	6.5 °C	19.6 °C	−3.9 °C	59	140	11	0
Apr	10.4 °C	24.1 °C	−0.7 °C	75	176	2	1
May	14.5 °C	28.2 °C	3.7 °C	119	192	0	4
Jun	18.2 °C	31.7 °C	7.8 °C	118	211	0	11
Jul	19.9 °C	32.7 °C	10.2 °C	121	232	0	16
Aug	19.5 °C	32.0 °C	9.5 °C	119	216	0	14
Sep	15.2 °C	27.4 °C	5.6 °C	83	161	0	4
Oct	10.8 °C	22.5 °C	1.3 °C	78	101	1	0
Nov	5.6 °C	16.6 °C	−3.2 °C	66	55	8	0
Dec	2.4 °C	12.8 °C	−7.6 °C	73	43	18	0
Year	10.6 °C	32.7 °C	−7.7 °C	1018	1666	77	50

Source: MeteoSwiss open data (1991–2020 normals) — stations Cham (13 km, 443 m), Zürich / Fluntern (18 km, 604 m), Zürich / Affoltern (19 km, 444 m), adjusted to the elevation of Aristau (380 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.