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Hourly Forecast
Daylight Hours
07:44
Sunrise
19:13
Sunset
Moon
Waning Gibbous
20:57
Moonrise
12:20
Moonset
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View stargazing scoreWeather in Saint-Just-Chaleyssin today, September 30, 2026
Saint-Just-Chaleyssin starts September 30, 2026 looking damp, with rain in the forecast and wetter spells likely at times. Waterproof kit is the safer call for early plans. Cloud leads the morning, peaking close to 100% near 08:00. Sunshine has little room until later in the day.
The temperature range runs from about 19°C up to 22°C. Moisture in the air spans 49%-85%, with the highest values around 23:00. Airflow remains manageable, reaching about 6.4 km/h around 13:00.
Through the afternoon wet weather remains a factor, with rain chances near 92% around 13:00. Cloud also stays substantial, close to 100% near 12:00. Horizontal visibility sits around 34.7 km, briefly nearer 20.6 km. Daylight runs from 07:44 to 19:13, lasting 11 hours 28 minutes of sunlight today.
In short, treat September 30, 2026 in Saint-Just-Chaleyssin as a damp day: pack covers, watch the wetter hours, and expect a high near 22°C.
Frequently asked questions about weather in Saint-Just-Chaleyssin
How warm does it get in Saint-Just-Chaleyssin?
The warmest month in Saint-Just-Chaleyssin is August, with average high temperatures of 29°C. The average temperature during this period is around 23°C.
How cold does it get in Saint-Just-Chaleyssin?
The coldest month in Saint-Just-Chaleyssin is January, with average low temperatures of 1°C. The average temperature during this period is around 4°C.
What is the wettest time of year in Saint-Just-Chaleyssin?
The wettest month in Saint-Just-Chaleyssin is May, with an average of 108mm of precipitation.
What is the driest time of year in Saint-Just-Chaleyssin?
The driest month in Saint-Just-Chaleyssin is February, with an average of 57mm of precipitation.
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