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17°
Mostly Clear
Feels Like: 18°
Min: 9°
Max: 23°
The next few hours will be mostly clear, with today reaching 23°C and dropping to 11°C. The coming days will be light rain
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:32
Sunrise
19:17
Sunset
Moon
Waxing Gibbous
18:47
Moonrise
05:49
Moonset
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View stargazing scoreWeather in Cossonay today, September 25, 2026
Expect a mostly clear day in Cossonay on September 25, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled. Morning skies stay relatively clear, holding cloud close to 17% near 11:00. The early part of the day favours being outside.
Expect highs of 23°C and cooler readings close to 9°C. The air stays humid, with relative humidity between 32% and 66% and the peak around 11:00. Airflow remains manageable, reaching about 2.8 km/h around 11:00.
The afternoon keeps an overcast feel, as cloud reaches about 100% around 14:00. Outdoor plans may still want a flexible backup. Expect visibility near 41.5 km, with poorer spells close to 34.6 km. Expect sunrise at 07:32, sunset at 19:17, and 11 hours 44 minutes of sunlight today overall.
In short, September 25, 2026 looks like a fine day in Cossonay for being outside, peaking around 23°C.
Frequently asked questions about weather in Cossonay
How warm does it get in Cossonay?
The warmest month in Cossonay is August, with average high temperatures of 24°C. The average temperature during this period is around 20°C.
How cold does it get in Cossonay?
The coldest month in Cossonay is January, with average low temperatures of 1°C. The average temperature during this period is around 3°C.
What is the wettest time of year in Cossonay?
The wettest month in Cossonay is December, with an average of 139mm of precipitation.
What is the driest time of year in Cossonay?
The driest month in Cossonay is February, with an average of 86mm of precipitation.
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