What is the weather in Grellingen today?

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

What is the 15-day forecast for Grellingen?

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

Will it rain tomorrow in Grellingen?

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

What is the air quality in Grellingen?

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

Are there weather alerts for Grellingen?

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

At what altitude is Grellingen located?

Grellingen sits at around 320 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 Grellingen?

The warmest month in Grellingen is July, averaging 19.7 °C (1991–2020 normal). The coldest is January at 2.1 °C.

How much does it rain in Grellingen per year?

Grellingen receives about 854 mm of precipitation a year. The wettest month is May (97 mm), the driest February (47 mm).

When is the best time to visit Grellingen?

For warmth and sunshine: July (19.7 °C on average, 236 h of sun). The coldest month is January (2.1 °C). Check the 15-day forecast above for your dates.

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Weather in Grellingen

Basel-Country, 320 m · continuously updated

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

Temperature · last 4 and next 28 hours

Grellingen weather: the next 24 hours

Updated hourly.

Grellingen weather hour by hour (48 h)

Grellingen 15-day forecast

Two-week trend.

Grellingen 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 Grellingen

Neighbouring municipalities, as the crow flies.

Himmelried2 km Nenzlingen2 km Duggingen2 km Brislach3 km Nunningen3 km Pfeffingen3 km Seewen3 km Aesch (BL)3 km

7-day forecast for Grellingen

Today (Sunday 27 Sep) in Grellingen: mostly sunny, 14 to 29 °C, precipitation 0.0 mm (0 %), wind up to 9 km/h. Tomorrow: overcast, 17 to 30 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	mostly sunny	14 °C	29 °C	0.0 mm	9 km/h
Tomorrow	overcast	17 °C	30 °C	0.0 mm	10 km/h
Tue 29 Sep	overcast	16 °C	27 °C	0.0 mm	8 km/h
Wed 30 Sep	overcast	18 °C	26 °C	0.3 mm	5 km/h
Thu 1 Oct	light rain	16 °C	19 °C	6.0 mm	5 km/h
Fri 2 Oct	fog	14 °C	21 °C	0.0 mm	7 km/h
Sat 3 Oct	fog	13 °C	23 °C	0.0 mm	6 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 320 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Grellingen

Sunday 27 Sep in Grellingen, 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	16 °C	8 km/h
01:00	sunny	15 °C	8 km/h
02:00	sunny	15 °C	7 km/h
03:00	sunny	15 °C	8 km/h
04:00	sunny	14 °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	15 °C	8 km/h
09:00	sunny	18 °C	6 km/h
10:00	sunny	20 °C	3 km/h
11:00	sunny	23 °C	2 km/h
12:00	sunny	26 °C	6 km/h
13:00	sunny	27 °C	7 km/h
14:00	sunny	28 °C	9 km/h
15:00	sunny	29 °C	8 km/h
16:00	sunny	29 °C	8 km/h
17:00	mostly sunny	28 °C	10 km/h
18:00	sunny	27 °C	5 km/h
19:00	sunny	24 °C	6 km/h
20:00	sunny	20 °C	9 km/h
21:00	sunny	20 °C	8 km/h
22:00	sunny	19 °C	8 km/h
23:00	mostly sunny	19 °C	8 km/h

Hourly forecast issued 27.09.2026 for Grellingen (320 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Grellingen weather tomorrow

Tomorrow, Monday 28 Sep, in Grellingen: overcast, 17 to 30 °C, wind up to 10 km/h. No precipitation expected.

Grellingen weekend weather

This weekend in Grellingen: Saturday fog, 13 to 23 °C; Sunday mostly sunny, 14 to 29 °C.

Will it rain in Grellingen this week?

Yes: 1 day with precipitation is expected in Grellingen over the next 7 days, 6.3 mm in total. Wettest day: Thursday 1 Oct (6.0 mm).

The best day to go out in Grellingen

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

The last 7 days in Grellingen

From 20 Sep to 26 Sep: 17.1 °C on average, 2.0 °C above the September normal (15.1 °C), 0 mm of precipitation (7-day normal: 17 mm). Warmest day: saturday 26 Sep (27 °C); coolest night: tuesday 22 Sep (9 °C).

Day	Min	Max
Sun 20 Sep	14 °C	26 °C
Mon 21 Sep	12 °C	20 °C
Tue 22 Sep	9 °C	21 °C
Wed 23 Sep	9 °C	23 °C
Thu 24 Sep	13 °C	23 °C
Fri 25 Sep	9 °C	23 °C
Sat 26 Sep	11 °C	27 °C

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

Climate of Grellingen: 1991–2020 normals

In Grellingen (320 m), the mean annual temperature is 10.7 °C. The warmest month is July (19.7 °C on average) and the coldest January (2.1 °C). About 854 mm of precipitation falls per year, peaking in May (97 mm) with a minimum in February (47 mm). The sun shines for about 1687 hours a year, mostly in July (236 h). On average there are 66 frost days and 14 hot days (≥ 30 °C) per year. The mean monthly maximum reaches 32.7 °C and the absolute minimum −8.5 °C.

10.7 °CMean annual temperature

854 mmPrecipitation per year

1687 hSunshine hours per year

66Frost days per year

58Summer 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	2.1 °C	13.6 °C	−8.5 °C	49	66	17	0
Feb	3.1 °C	15.2 °C	−7.2 °C	47	88	14	0
Mar	6.8 °C	20.3 °C	−4.1 °C	50	137	9	0
Apr	10.5 °C	24.5 °C	−0.8 °C	64	167	2	1
May	14.4 °C	28.1 °C	3.6 °C	97	181	0	5
Jun	17.9 °C	31.4 °C	7.5 °C	88	206	0	12
Jul	19.7 °C	32.7 °C	9.8 °C	91	236	0	18
Aug	19.3 °C	32.0 °C	9.2 °C	90	217	0	16
Sep	15.1 °C	26.8 °C	5.4 °C	71	160	0	5
Oct	10.9 °C	22.9 °C	1.3 °C	74	110	1	0
Nov	5.9 °C	17.0 °C	−3.3 °C	66	65	6	0
Dec	2.8 °C	14.2 °C	−7.1 °C	66	54	15	0
Year	10.7 °C	32.7 °C	−8.5 °C	854	1687	66	58

Source: MeteoSwiss open data (1991–2020 normals) — stations Basel / Binningen (11 km, 316 m), St. Chrischona (17 km, 493 m), Delémont (20 km, 439 m), adjusted to the elevation of Grellingen (320 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.