See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
18°
Hazy
Feels Like: 21°
Min: 18°
Max: 25°
The next few hours will be mostly clear, with tomorrow reaching 25°C and dropping to 17°C. The coming days will be drizzle throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:10
Sunrise
18:10
Sunset
Moon
Waxing Gibbous
13:33
Moonrise
03:13
Moonset
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View stargazing scoreWeather in Saint-Louis tomorrow, September 22, 2026
Saint-Louis looks damp on September 22, 2026, so plan for wet spells during the day. Early travel and outdoor time should assume rain can arrive quickly. Morning plans should assume damp conditions, as rain chances climb toward 50% around 11:00. Cloud cover is also at its densest near 11:00 at roughly 55%.
Temperatures climb from an overnight low near 17°C toward a daytime high of about 25°C. Expect humidity between 60% and 82%, most humid near 19:00. Winds stay light, near 4.0 km/h by 13:00, so the day feels still more than breezy.
Afternoon showers stay in play, peaking near 50% around 12:00. Skies remain cluttered, with cover about 81% by 16:00. Visibility stays generally good near 8.9 km on average, though it can drop toward 0.5 km in thicker cloud or showers. Daylight runs from 06:09 to 18:11, lasting 12 hours 1 minutes of sunlight today.
Taken together, Saint-Louis looks wet enough on September 22, 2026 that flexible outdoor plans work best, with temperatures peaking near 25°C.
Frequently asked questions about weather in Saint-Louis
How warm does it get in Saint-Louis?
The warmest month in Saint-Louis is February, with average high temperatures of 26°C. The average temperature during this period is around 23°C.
How cold does it get in Saint-Louis?
The coldest month in Saint-Louis is August, with average low temperatures of 15°C. The average temperature during this period is around 17°C.
What is the wettest time of year in Saint-Louis?
The wettest month in Saint-Louis is January, with an average of 308mm of precipitation.
What is the driest time of year in Saint-Louis?
The driest month in Saint-Louis is September, with an average of 46mm of precipitation.
