St. Louis Climate and Average Weather
Climate of St. Louis: average temperatures, rainfall and seasons month by month.
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).
Recent extremes in St. Louis
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How St. Louis compares with nearby places
Annual averages, and the difference against St. Louis.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Gateway Arch National Park | 1 mi | 58°F | about the same | 45 in |
| Illinois | 85 mi | 56°F | 34°F cooler | 36 in |
| Starved Rock State Park | 197 mi | 53°F | 37°F cooler | 39 in |
| Branson | 215 mi | 60°F | +34°F warmer | 44 in |
| Indianapolis | 230 mi | 55°F | 35°F cooler | 43 in |
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.
What this means for St. Louis
Today is slightly cooler than average for August. The forecast high of 82°F is 3.6°F below the 86°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 83°F.
What to pack, what to skip
- Lightweight, light-coloured clothing and a refillable water bottle
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
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 81°F (27°C) in St. Louis with overcast. It feels like 80°F. Today runs from 64°F to 82°F. Chance of precipitation is 2%. Sightseeing conditions score 9.3/10 - 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 slightly cooler than average for August. The forecast high of 82°F is 3.6°F below the 86°F typical for this month. The best window to be outside is roughly 8 AM to 11 AM, when temperature, rain chance and wind line up best. family time is the strongest bet in St. Louis today at 9.6/10. 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.
Quick facts about St. Louis
| Type | City |
|---|---|
| State | Missouri |
| Country | United States |
| Continent | North America |
| Coordinates | 38°37′37.2″N 90°11′57.8″W (38.627, -90.1994) |
| Population | 290.000 |
| Known for | Gateway Arch and blues |
| Local time | 6:06 PM (UTC-05:00) |
| Best months | August, September and October |
| Climate | Continental |
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.
Explore St. Louis
Every topic we hold for this place, and the same topic for the places around it.
Climate 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 81°F (27°C) with overcast. Humidity is 40% and wind is 7 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 6:06 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 23, 2026 at 6:06 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
