St. Louis Weather Forecast
St. Louis weather: 87°F, clear sky. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
St. Louis is a city in Missouri. St. Louis is known for Gateway Arch and blues. It has a population of about 290.000.
Right now it is 87°F (31°C) in St. Louis with clear sky. It feels like 89°F. Today runs from 66°F to 88°F. Chance of precipitation is 1%. Sightseeing conditions score 8.8/10 - excellent - go now.
The best time to visit St. Louis is August, September and October. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 88°F, while January is the coldest with lows near 22°F.
The closest major airport is Nashville International Airport (BNA), about 259 mi away. Nearby highlights include Gateway Arch National Park, Starved Rock State Park and Mammoth Cave National Park.
In plain terms. Today is about average for August. The forecast high of 88°F is in line with the 86°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. swimming is the strongest bet in St. Louis today at 10/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Active alerts for St. Louis
Derived from the forecast. No official alert feed is wired for this country yet.
Weather in St. Louis right now
Source: Open-Meteo. Updated 6:04 PM, Aug 21 local time.
See the St. Louis forecast by time range
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for St. Louis
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Fri, Aug 21 | ☁️ Overcast | 88° / 66° | 1% | 6 mph | 7 |
| Sat, Aug 22 | ☁️ Overcast | 88° / 71° | 5% | 12 mph | 7 |
| Sun, Aug 23 | ☁️ Overcast | 89° / 66° | 1% | 9 mph | 7 |
| Mon, Aug 24 | ☁️ Overcast | 87° / 67° | 5% | 10 mph | 7 |
| Tue, Aug 25 | ☁️ Overcast | 87° / 69° | 8% | 9 mph | 7 |
| Wed, Aug 26 | ☁️ Overcast | 91° / 73° | 6% | 9 mph | 5 |
| Thu, Aug 27 | 🌦️ Light drizzle | 95° / 74° | 6% · 0,0 in | 8 mph | 8 |
| Fri, Aug 28 | ☁️ Overcast | 96° / 70° | 7% | 10 mph | 7 |
| Sat, Aug 29 | 🌦️ Drizzle | 94° / 75° | 9% · 0,1 in | 14 mph | 7 |
| Sun, Aug 30 | ☁️ Overcast | 104° / 78° | 19% | 12 mph | 7 |
| Mon, Aug 31 | ☁️ Overcast | 109° / 85° | 22% | 13 mph | 7 |
| Tue, Sep 1 | 🌦️ Drizzle | 106° / 73° | 18% · 0,1 in | 13 mph | 7 |
| Wed, Sep 2 | 🌦️ Light drizzle | 96° / 73° | 23% · 0,1 in | 12 mph | 6 |
| Thu, Sep 3 | ☁️ Overcast | 94° / 80° | 23% | 11 mph | 6 |
| Fri, Sep 4 | ☁️ Overcast | 107° / 79° | 42% | 12 mph | 7 |
| Sat, Sep 5 | 🌧️ Heavy drizzle | 96° / 74° | 43% · 0,1 in | 12 mph | 7 |
Climate in St. Louis month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 36° | 22° | 2,9 in | ★★☆☆☆ |
| February | 49° | 30° | 1,4 in | ★★★☆☆ |
| March | 63° | 42° | 4,1 in | ★★★☆☆ |
| April | 69° | 51° | 7,1 in | ★★★☆☆ |
| May | 76° | 58° | 6,0 in | ★★★★☆ |
| June | 86° | 68° | 5,9 in | ★★★★☆ |
| July | 88° | 72° | 5,4 in | ★★★★☆ |
| August | 86° | 69° | 1,9 in | ★★★★☆ |
| September | 82° | 63° | 2,8 in | ★★★★☆ |
| October | 71° | 52° | 1,9 in | ★★★★☆ |
| November | 56° | 40° | 3,3 in | ★★★☆☆ |
| December | 47° | 32° | 2,4 in | ★★★☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Weather map for St. Louis
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in St. Louis
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit St. Louis
Go in August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
Explore St. Louis
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is St. Louis?
St. Louis is a city in Missouri. Its coordinates are 38.627, -90.1994. It lies in North America.
What is the weather like in St. Louis right now?
It is currently 87°F (31°C) with clear sky. Humidity is 47% and wind is 6 mph.
When is the best time to visit St. Louis?
August, September and October offer the most comfortable conditions in St. Louis, which has a continental climate. January, February 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 6:04 PM.
How many people live in St. Louis?
St. Louis has a population of approximately 290.000.
What is the nearest airport to St. Louis?
The closest airports are Nashville International Airport (BNA), 259 mi away and O'Hare International Airport (ORD), 261 mi away.
What are the top things to 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. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather 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 August 21, 2026 at 6:04 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
