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10°
Mostly Clear
Feels Like: 9°
Min: 10°
Max: 22°
The next few hours will be mostly clear, with today reaching 22°C and dropping to 12°C. The coming days will be mostly cloudy
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:29
Sunrise
19:13
Sunset
Moon
Waxing Gibbous
18:43
Moonrise
05:45
Moonset
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View stargazing scoreWeather in Grenchen today, September 25, 2026
Grenchen starts September 25, 2026 under largely sunny skies, with bright spells setting the tone from the outset. Outdoor plans should enjoy long stretches of open sky as the day unfolds. Expect a brighter morning, with limited cloud around 27% by 08:00. Conditions start on a settled note.
The temperature range runs from about 10°C up to 22°C. The air stays humid, with relative humidity between 46% and 88% and the peak around 07:00. Airflow remains manageable, reaching about 2.0 km/h around 15:00.
Expect persistent cloud later on, with amounts around 96% by 15:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 38.3 km on average, though it can drop toward 28.8 km in thicker cloud or showers. Daylight runs from 07:29 to 19:13, lasting 11 hours 44 minutes of sunlight today.
In short, September 25, 2026 looks like a fine day in Grenchen for being outside, peaking around 22°C.
Frequently asked questions about weather in Grenchen
How warm does it get in Grenchen?
The warmest month in Grenchen is July, with average high temperatures of 25°C. The average temperature during this period is around 19°C.
How cold does it get in Grenchen?
The coldest month in Grenchen is January, with average low temperatures of -2°C. The average temperature during this period is around 1°C.
What is the wettest time of year in Grenchen?
The wettest month in Grenchen is May, with an average of 154mm of precipitation.
What is the driest time of year in Grenchen?
The driest month in Grenchen is February, with an average of 77mm of precipitation.
