St. Louis Väder Prognos
St. Louis weather: 26°C, klart. Varje timme forecast, 14-day outlook, UV, air quality and the best time och visit.
14-day forecast for St. Louis
Max / Min; Nederb.; UV
| Dag | Förhållanden | Max / Min | Nederb. | Vind | UV |
|---|---|---|---|---|---|
| ons, sep 16 | ☁️ Mulet | 36° / 24° | 18% | 10 km/h | 6 |
| tor, sep 17 | 🌦️ Light drizzle | 36° / 23° | 32% · 1 mm | 15 km/h | 6 |
| fre, sep 18 | ☁️ Mulet | 38° / 27° | 3% | 18 km/h | 6 |
| lör, sep 19 | ☁️ Mulet | 36° / 27° | 10% | 14 km/h | 5 |
| sön, sep 20 | ☁️ Mulet | 37° / 27° | 19% | 13 km/h | 5 |
| mån, sep 21 | 🌦️ Light drizzle | 31° / 23° | 24% · 0 mm | 18 km/h | 5 |
| tis, sep 22 | 🌤️ Mest klart | 31° / 19° | 21% | 7 km/h | 6 |
| ons, sep 23 | 🌦️ Light drizzle | 34° / 20° | 11% · 1 mm | 20 km/h | 5 |
| tor, sep 24 | ☁️ Mulet | 27° / 17° | 9% | 23 km/h | 5 |
| fre, sep 25 | ☀️ Klart | 24° / 14° | 12% | 17 km/h | 6 |
| lör, sep 26 | ☀️ Klart | 26° / 13° | 15% | 10 km/h | 6 |
| sön, sep 27 | ⛅ Delvis molnigt | 29° / 13° | 17% | 13 km/h | 6 |
| mån, sep 28 | ⛅ Delvis molnigt | 32° / 15° | 14% | 10 km/h | 6 |
| tis, sep 29 | ⛅ Delvis molnigt | 32° / 18° | 30% | 11 km/h | 6 |
The two-week trend
Cooling. The second half of the window averages 6°C cooler than the days immediately ahead.
The window averages 32°C against a september normal of 28°C - 4°C above.
The next 7 days look unusually dry - roughly 5% of a normal september week (1 mm against 16 mm).
What this means for St. Louis
Today is much warmer than average for september. The forecast high of 36°C is 8.6°C above the 28°C typical for this month.
A 18% chance means most of the area stays dry; a passing shower is possible but short.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in juni och augusti.
The gap between the warmest and coldest month averages 28°C.
What och pack, what och skip
- Lightweight, light-coloured clothing and a refillable water bottle
- sönglasses, a brimmed hat and SPF 30+
- Avoid long hikes after mid-morning; start at dawn or leave it for a cooler day.
- If your dates are flexible, avoid januari, februari and december - historically the least comfortable months here.
Se prognosen för St. Louis per tidsintervall
St. Louis weather - more answers
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Frequently asked questions
Where is St. Louis?
St. Louis is a city in Missouri. Its coordinates are 38.627, -90.1994. It lies in Nordamerika.
What is the weather like in St. Louis just nu?
It is currently 26°C (78°F) med klart. Luftfuktighet is 78% and wind is 2 km/h.
When is the best time och visit St. Louis?
augusti, september and oktober offer the most comfortable conditions in St. Louis, which has a continental climate. januari, februari and december are usually the hardest months for outdoor plans.
What time zone is St. Louis in?
St. Louis observes America/Chicago (UTC-05:00). The local time is 12:52 AM.
How many people live in St. Louis?
St. Louis has a population of approximately 290.000.
What is the nearest airport och St. Louis?
The closest airports are Nashville International Airport (BNA), 417 km away and O'Hare International Airport (ORD), 420 km away.
What are the top things och do in St. Louis?
Popular options include Gateway Arch National Park, Starved Rock State Park and Mammoth Cave National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (cities-us) - coordinates, hierarchy and facts. |
|---|---|
| Prognos and observations | Open-Meteo (ECMWF and national models). |
| Luftkvalitet and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Klimat averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Väder Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated september 16, 2026 at 12:52 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
