See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:28
Sunrise
19:12
Sunset
Moon
Waxing Gibbous
18:43
Moonrise
05:44
Moonset
Daily Forecast
Today
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Air Quality Data Available
Upgrade to access real-time air quality data for Saint-Louis.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Saint-Louis.
View stargazing scoreWeather in Saint-Louis today, September 25, 2026
Expect a mostly clear day in Saint-Louis on September 25, 2026, with sunshine dominating from morning through evening. Cloud should stay limited, so the overall feel remains bright and settled. The opening hours look fair, as cloud stays near 14% around 09:00. Morning errands should face fewer weather interruptions.
The temperature range runs from about 8°C up to 24°C. Expect humidity between 23% and 88%, most humid near 09:00. Expect gentle winds, highest near 14:00 at 1.4 km/h.
The afternoon keeps an overcast feel, as cloud reaches about 98% around 15:00. Outdoor plans may still want a flexible backup. Expect visibility near 43.7 km, with poorer spells close to 20.9 km. Sunrise is at 07:28 and sunset at 19:12, giving 11 hours 44 minutes of sunlight today.
In short, September 25, 2026 looks like a fine day in Saint-Louis for being outside, peaking around 24°C.
Frequently asked questions about weather in Saint-Louis
How warm does it get in Saint-Louis?
The warmest month in Saint-Louis is July, with average high temperatures of 25°C. The average temperature during this period is around 20°C.
How cold does it get in Saint-Louis?
The coldest month in Saint-Louis is January, with average low temperatures of -1°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Saint-Louis?
The wettest month in Saint-Louis is June, with an average of 133mm of precipitation.
What is the driest time of year in Saint-Louis?
The driest month in Saint-Louis is February, with an average of 75mm of precipitation.
Explore more weather forecasts
- Rixheim, Grand Est
- Paris, Île-de-France
- Riedisheim, Grand Est
- Marseille, Provence-Alpes-Côte d'Azur
- Mulhouse, Grand Est
- Lyon, Auvergne-Rhône-Alpes
- Illzach, Grand Est
- Toulouse, Occitanie
- Kingersheim, Grand Est
- Nice, Provence-Alpes-Côte d'Azur
- Wittenheim, Grand Est
- Nantes, Pays de la Loire
- Wittelsheim, Grand Est
- Marne La Vallée, Île-de-France
- Cernay, Grand Est
- Strasbourg, Grand Est
