What is the weather in Sisseln today?

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

What is the 15-day forecast for Sisseln?

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

Will it rain tomorrow in Sisseln?

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

What is the air quality in Sisseln?

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

Are there weather alerts for Sisseln?

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

At what altitude is Sisseln located?

Sisseln sits at around 296 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 Sisseln?

The warmest month in Sisseln is July, averaging 19.9 °C (1991–2020 normal). The coldest is January at 2.0 °C.

How much does it rain in Sisseln per year?

Sisseln receives about 967 mm of precipitation a year. The wettest month is May (97 mm), the driest February (63 mm).

When is the best time to visit Sisseln?

For warmth and sunshine: July (19.9 °C on average, — h of sun). The coldest month is January (2.0 °C). Check the 15-day forecast above for your dates.

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Home › Aargau › Sisseln

Weather in Sisseln

Aargau, 296 m · continuously updated

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

Rhein (Oberwasser): 20.1 °C at Laufenburg river temperature · FOEN gauge 4.9 km away · 27.09. 00h

Temperature · last 4 and next 28 hours

Sisseln weather: the next 24 hours

Updated hourly.

Sisseln weather hour by hour (48 h)

Sisseln 15-day forecast

Two-week trend.

Sisseln 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 Sisseln

Neighbouring municipalities, as the crow flies.

Eiken2 km Münchwilen (AG)2 km Stein (AG)3 km Oeschgen4 km Obermumpf4 km Schupfart4 km Mumpf5 km Kaisten5 km

7-day forecast for Sisseln

Today (Sunday 27 Sep) in Sisseln: partly cloudy, 14 to 29 °C, precipitation 0.0 mm (0 %), wind up to 11 km/h. Tomorrow: overcast, 16 to 29 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	partly cloudy	14 °C	29 °C	0.0 mm	11 km/h
Tomorrow	overcast	16 °C	29 °C	0.0 mm	13 km/h
Tue 29 Sep	overcast	13 °C	28 °C	0.0 mm	10 km/h
Wed 30 Sep	overcast	16 °C	26 °C	0.0 mm	7 km/h
Thu 1 Oct	light rain	16 °C	19 °C	5.1 mm	6 km/h
Fri 2 Oct	fog	13 °C	22 °C	0.0 mm	4 km/h
Sat 3 Oct	overcast	15 °C	23 °C	0.0 mm	4 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 296 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Sisseln

Sunday 27 Sep in Sisseln, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 14 °C around 07:00, high 29 °C around 16:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	17 °C	7 km/h
01:00	sunny	16 °C	7 km/h
02:00	sunny	16 °C	8 km/h
03:00	sunny	15 °C	8 km/h
04:00	sunny	15 °C	8 km/h
05:00	sunny	14 °C	8 km/h
06:00	sunny	14 °C	8 km/h
07:00	sunny	14 °C	8 km/h
08:00	sunny	14 °C	8 km/h
09:00	sunny	16 °C	9 km/h
10:00	sunny	18 °C	10 km/h
11:00	sunny	21 °C	11 km/h
12:00	mostly sunny	23 °C	9 km/h
13:00	mostly sunny	25 °C	7 km/h
14:00	sunny	27 °C	3 km/h
15:00	sunny	28 °C	2 km/h
16:00	sunny	29 °C	3 km/h
17:00	sunny	29 °C	2 km/h
18:00	mostly sunny	28 °C	6 km/h
19:00	sunny	25 °C	2 km/h
20:00	sunny	22 °C	6 km/h
21:00	partly cloudy	20 °C	7 km/h
22:00	mostly sunny	20 °C	7 km/h
23:00	sunny	19 °C	6 km/h

Hourly forecast issued 27.09.2026 for Sisseln (296 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Sisseln weather tomorrow

Tomorrow, Monday 28 Sep, in Sisseln: overcast, 16 to 29 °C, wind up to 13 km/h. No precipitation expected.

Sisseln weekend weather

This weekend in Sisseln: Saturday overcast, 15 to 23 °C; Sunday partly cloudy, 14 to 29 °C.

Will it rain in Sisseln this week?

Yes: 1 day with precipitation is expected in Sisseln over the next 7 days, 5.1 mm in total. Wettest day: Thursday 1 Oct (5.1 mm).

The best day to go out in Sisseln

The best day of the next 7 in Sisseln: Sunday 27 Sep, partly cloudy, up to 29 °C.

The last 7 days in Sisseln

From 20 Sep to 26 Sep: 17.0 °C on average, 1.7 °C above the September normal (15.3 °C), 0 mm of precipitation (7-day normal: 17 mm). Warmest day: saturday 26 Sep (27 °C); coolest night: wednesday 23 Sep (9 °C).

Day	Min	Max
Sun 20 Sep	12 °C	25 °C
Mon 21 Sep	14 °C	21 °C
Tue 22 Sep	9 °C	22 °C
Wed 23 Sep	9 °C	23 °C
Thu 24 Sep	10 °C	22 °C
Fri 25 Sep	10 °C	24 °C
Sat 26 Sep	10 °C	27 °C

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

Climate of Sisseln: 1991–2020 normals

In Sisseln (296 m), the mean annual temperature is 10.7 °C. The warmest month is July (19.9 °C on average) and the coldest January (2.0 °C). About 967 mm of precipitation falls per year, peaking in May (97 mm) with a minimum in February (63 mm). On average there are 75 frost days and 16 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 33.1 °C and the absolute minimum −7.4 °C.

10.7 °CMean annual temperature

967 mmPrecipitation per year

75Frost days per year

57Summer 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	2.0 °C	12.9 °C	−7.4 °C	74	18	0
Feb	2.8 °C	14.6 °C	−6.7 °C	63	18	0
Mar	6.6 °C	19.6 °C	−3.4 °C	68	13	0
Apr	10.5 °C	24.1 °C	−0.3 °C	69	3	1
May	14.5 °C	28.1 °C	4.0 °C	97	0	6
Jun	18.1 °C	31.7 °C	7.8 °C	87	0	13
Jul	19.9 °C	33.1 °C	10.3 °C	97	0	17
Aug	19.5 °C	32.2 °C	9.7 °C	92	0	16
Sep	15.3 °C	27.2 °C	5.9 °C	71	0	4
Oct	10.9 °C	22.5 °C	1.9 °C	79	1	0
Nov	5.9 °C	16.7 °C	−2.4 °C	80	6	0
Dec	2.8 °C	13.2 °C	−6.2 °C	91	15	0
Year	10.7 °C	33.1 °C	−7.4 °C	967	75	57

Source: MeteoSwiss open data (1991–2020 normals) — stations Rünenberg (15 km, 611 m), Leibstadt (16 km, 341 m), Würenlingen / PSI (18 km, 334 m), adjusted to the elevation of Sisseln (296 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.