About Grellingen
Grellingen is a Swiss municipality located in the canton of Basel-Country (BL), at 47.439° latitude and 7.584° longitude. The municipality is part of the Rhine valley, mild climate for Switzerland thanks to low elevation. Also known as Grellingen, Grellingen benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Grellingen
The climate in Grellingen is characteristic of the Rhine valley, mild climate for Switzerland thanks to low elevation. Temperatures, precipitation and wind conditions vary throughout the year with local features linked to altitude and surrounding terrain. Our data comes from official weather stations and real-time Netatmo sensors for Grellingen and neighboring municipalities.
On this page you will find the detailed weather forecast for Grellingen: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
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.
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.
Nearby cities
Check the weather of cities near Grellingen:
- Weather Himmelried
- Weather Nenzlingen
- Weather Duggingen
- Weather Brislach
- Weather Nunningen
- Weather Pfeffingen
- Weather Seewen
- Weather Aesch (BL)
- Weather Zwingen
- Weather Fehren
- Weather Breitenbach
- Weather Hochwald
→ Nearby cities · Canton Basel-Country
Frequently asked questions about weather in Grellingen
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.