What is the weather in Sissach today?

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

What is the 15-day forecast for Sissach?

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

Will it rain tomorrow in Sissach?

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

What is the air quality in Sissach?

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

Are there weather alerts for Sissach?

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

At what altitude is Sissach located?

Sissach sits at around 444 m above sea level in the canton of Basel-Country. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.

What is the warmest month in Sissach?

The warmest month in Sissach is July, averaging 19.2 °C (1991–2020 normal). The coldest is January at 1.7 °C.

How much does it rain in Sissach per year?

Sissach receives about 944 mm of precipitation a year. The wettest month is May (106 mm), the driest February (49 mm).

When is the best time to visit Sissach?

For warmth and sunshine: July (19.2 °C on average, 233 h of sun). The coldest month is January (1.7 °C). Check the 15-day forecast above for your dates.

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Home › Basel-Country › Sissach

Weather in Sissach

Basel-Country, 444 m · continuously updated

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

Temperature · last 4 and next 28 hours

Sissach weather: the next 24 hours

Updated hourly.

Sissach weather hour by hour (48 h)

Sissach 15-day forecast

Two-week trend.

Sissach 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 Sissach

Neighbouring municipalities, as the crow flies.

Itingen1 km Böckten2 km Nusshof2 km Hersberg3 km Thürnen3 km Lausen3 km Wintersingen3 km Zunzgen3 km

7-day forecast for Sissach

Today (Sunday 27 Sep) in Sissach: mostly sunny, 13 to 29 °C, precipitation 0.0 mm (0 %), wind up to 11 km/h. Tomorrow: overcast, 15 to 29 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	mostly sunny	13 °C	29 °C	0.0 mm	11 km/h
Tomorrow	overcast	15 °C	29 °C	0.0 mm	11 km/h
Tue 29 Sep	overcast	14 °C	27 °C	0.0 mm	9 km/h
Wed 30 Sep	overcast	17 °C	25 °C	0.0 mm	6 km/h
Thu 1 Oct	light rain	16 °C	18 °C	6.0 mm	4 km/h
Fri 2 Oct	fog	13 °C	20 °C	0.0 mm	4 km/h
Sat 3 Oct	fog	13 °C	22 °C	0.0 mm	6 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 444 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Sissach

Sunday 27 Sep in Sissach, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 13 °C around 07:00, high 29 °C around 15:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	14 °C	6 km/h
01:00	sunny	14 °C	6 km/h
02:00	sunny	13 °C	6 km/h
03:00	sunny	13 °C	7 km/h
04:00	sunny	13 °C	7 km/h
05:00	sunny	13 °C	8 km/h
06:00	sunny	13 °C	8 km/h
07:00	sunny	13 °C	7 km/h
08:00	sunny	13 °C	6 km/h
09:00	sunny	16 °C	6 km/h
10:00	sunny	20 °C	6 km/h
11:00	sunny	23 °C	5 km/h
12:00	sunny	25 °C	5 km/h
13:00	sunny	27 °C	6 km/h
14:00	sunny	28 °C	6 km/h
15:00	sunny	29 °C	7 km/h
16:00	sunny	29 °C	9 km/h
17:00	sunny	28 °C	10 km/h
18:00	sunny	27 °C	9 km/h
19:00	sunny	25 °C	6 km/h
20:00	mostly sunny	21 °C	5 km/h
21:00	partly cloudy	19 °C	5 km/h
22:00	sunny	18 °C	5 km/h
23:00	sunny	17 °C	6 km/h

Hourly forecast issued 27.09.2026 for Sissach (444 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Sissach weather tomorrow

Tomorrow, Monday 28 Sep, in Sissach: overcast, 15 to 29 °C, wind up to 11 km/h. No precipitation expected.

Sissach weekend weather

This weekend in Sissach: Saturday fog, 13 to 22 °C; Sunday mostly sunny, 13 to 29 °C.

Will it rain in Sissach this week?

Yes: 1 day with precipitation is expected in Sissach over the next 7 days, 6.0 mm in total. Wettest day: Thursday 1 Oct (6.0 mm).

The best day to go out in Sissach

The best day of the next 7 in Sissach: Sunday 27 Sep, mostly sunny, up to 29 °C.

The last 7 days in Sissach

From 20 Sep to 26 Sep: 16.4 °C on average, 1.6 °C above the September normal (14.8 °C), 0 mm of precipitation (7-day normal: 18 mm). Warmest day: saturday 26 Sep (27 °C); coolest night: wednesday 23 Sep (7 °C).

Day	Min	Max
Sun 20 Sep	11 °C	25 °C
Mon 21 Sep	12 °C	21 °C
Tue 22 Sep	8 °C	22 °C
Wed 23 Sep	7 °C	23 °C
Thu 24 Sep	10 °C	22 °C
Fri 25 Sep	8 °C	23 °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 Sissach: 1991–2020 normals

In Sissach (444 m), the mean annual temperature is 10.3 °C. The warmest month is July (19.2 °C on average) and the coldest January (1.7 °C). About 944 mm of precipitation falls per year, peaking in May (106 mm) with a minimum in February (49 mm). The sun shines for about 1697 hours a year, mostly in July (233 h). On average there are 73 frost days and 5 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 31.5 °C and the absolute minimum −8.1 °C.

10.3 °CMean annual temperature

944 mmPrecipitation per year

1697 hSunshine hours per year

73Frost days per year

33Summer 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	12.6 °C	−8.1 °C	55	65	18	0
Feb	2.6 °C	14.0 °C	−7.1 °C	49	87	16	0
Mar	6.3 °C	18.8 °C	−3.9 °C	58	138	9	0
Apr	10.0 °C	22.9 °C	−0.7 °C	72	170	3	0
May	13.8 °C	26.8 °C	3.8 °C	106	189	0	2
Jun	17.3 °C	30.0 °C	7.5 °C	98	212	0	7
Jul	19.2 °C	31.5 °C	10.2 °C	105	233	0	12
Aug	18.9 °C	30.5 °C	9.5 °C	105	216	0	10
Sep	14.8 °C	25.6 °C	6.0 °C	79	161	0	2
Oct	10.6 °C	21.7 °C	1.7 °C	76	104	1	0
Nov	5.6 °C	16.3 °C	−2.8 °C	71	66	8	0
Dec	2.5 °C	13.1 °C	−6.6 °C	72	56	17	0
Year	10.3 °C	31.5 °C	−8.1 °C	944	1697	73	33

Source: MeteoSwiss open data (1991–2020 normals) — stations Rünenberg (7 km, 611 m), St. Chrischona (14 km, 493 m), Gösgen (18 km, 380 m), adjusted to the elevation of Sissach (444 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.